{"title":"Thermostat Wire \u0026 Electrical","description":"\u003cp\u003eProfessional thermostat wire \u0026amp; electrical for HVAC contractors and homeowners. All items ship same-day from Houston. 30-day returns.\u003c\/p\u003e","products":[{"product_id":"thermostat-wire-18-5-250-feet-cl2-solid-copper-hvac-cable","title":"Thermostat Wire 18\/5 250 Feet CL2 Solid Copper HVAC Cable","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eThermostat Wire 18\/5 250 Feet CL2 Solid Copper HVAC Cable\u003c\/h2\u003e\n    \u003cp\u003eThermostat Wire 18\/5 250 Feet CL2 Solid Copper HVAC Cable — solid copper thermostat cable for connecting your thermostat to the furnace or air handler. 5-conductor wire handles standard heating and cooling systems.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eSolid copper conductors for reliable signal transmission\u003c\/li\u003e\n\u003cli\u003eCL2-rated for in-wall installation per NEC code\u003c\/li\u003e\n\u003cli\u003e5 conductors — covers heat, cool, fan, common, and reversing valve\u003c\/li\u003e\n\u003cli\u003e250-foot spool — enough for most residential runs\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eGauge: 18 AWG\u003c\/li\u003e\n\u003cli\u003eConductors: 5\u003c\/li\u003e\n\u003cli\u003eLength: 250 feet\u003c\/li\u003e\n\u003cli\u003eRating: CL2 (in-wall rated)\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid copper\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eThermostat Wire 18\/5 250 Feet CL2 Solid Copper HVAC Cable\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow many conductors do I need?\u003c\/h4\u003e\n\u003cp\u003e2-wire for heat only. 4-wire for basic heat\/cool. 5-wire for heat\/cool with common wire (needed for smart thermostats). 8-wire for heat pumps with auxiliary heat. When in doubt, run more conductors than you think you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use this wire for a smart thermostat like Nest or Ecobee?\u003c\/h4\u003e\n\u003cp\u003eYes, but smart thermostats require a \"C\" (common) wire, so you need at least 5 conductors (18\/5). If you currently have 18\/4, you may need to upgrade the wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs this rated for in-wall installation?\u003c\/h4\u003e\n\u003cp\u003eYes, CL2-rated wire is approved for permanent in-wall installation per the National Electrical Code.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the maximum run length?\u003c\/h4\u003e\n\u003cp\u003e18 AWG thermostat wire can run up to about 250 feet without voltage drop issues. For runs over 200 feet, consider using 16 AWG wire.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004088762739,"sku":"NHVAC-THER-TKK9EW","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/7195gvRviuL._AC_SL1500_09aa60b0-9721-4a3f-a87b-0ec398bffbde.jpg?v=1781918155"},{"product_id":"thermostat-wire-18-8-250-feet-cl2-solid-copper-heat-pump","title":"Thermostat Wire 18\/8 250 Feet CL2 Solid Copper Heat Pump","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eThermostat Wire 18\/8 250 Feet CL2 Solid Copper Heat Pump\u003c\/h2\u003e\n    \u003cp\u003eThermostat Wire 18\/8 250 Feet CL2 Solid Copper Heat Pump — solid copper thermostat cable for connecting your thermostat to the furnace or air handler. 8-conductor wire handles heat pump systems with auxiliary heat.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eSolid copper conductors for reliable signal transmission\u003c\/li\u003e\n\u003cli\u003eCL2-rated for in-wall installation per NEC code\u003c\/li\u003e\n\u003cli\u003e8 conductors — enough for heat pump + aux heat + humidifier\u003c\/li\u003e\n\u003cli\u003e250-foot spool — enough for most residential runs\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eGauge: 18 AWG\u003c\/li\u003e\n\u003cli\u003eConductors: 8\u003c\/li\u003e\n\u003cli\u003eLength: 250 feet\u003c\/li\u003e\n\u003cli\u003eRating: CL2 (in-wall rated)\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid copper\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eThermostat Wire 18\/8 250 Feet CL2 Solid Copper Heat Pump\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow many conductors do I need?\u003c\/h4\u003e\n\u003cp\u003e2-wire for heat only. 4-wire for basic heat\/cool. 5-wire for heat\/cool with common wire (needed for smart thermostats). 8-wire for heat pumps with auxiliary heat. When in doubt, run more conductors than you think you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use this wire for a smart thermostat like Nest or Ecobee?\u003c\/h4\u003e\n\u003cp\u003eYes, but smart thermostats require a \"C\" (common) wire, so you need at least 5 conductors (18\/5). If you currently have 18\/4, you may need to upgrade the wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs this rated for in-wall installation?\u003c\/h4\u003e\n\u003cp\u003eYes, CL2-rated wire is approved for permanent in-wall installation per the National Electrical Code.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the maximum run length?\u003c\/h4\u003e\n\u003cp\u003e18 AWG thermostat wire can run up to about 250 feet without voltage drop issues. For runs over 200 feet, consider using 16 AWG wire.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004088795507,"sku":"NHVAC-THER-TL0IAH","price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/7195gvRviuL._AC_SL1500_325712d5-1de2-4e82-a2af-0b5694418eed.jpg?v=1781918157"},{"product_id":"thermostat-wire-18-2-250-feet-cl2-solid-copper-ac","title":"Thermostat Wire 18\/2 250 Feet CL2 Solid Copper AC","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eThermostat Wire 18\/2 250 Feet CL2 Solid Copper AC\u003c\/h2\u003e\n    \u003cp\u003eThermostat Wire 18\/2 250 Feet CL2 Solid Copper AC — solid copper thermostat cable for connecting your thermostat to the furnace or air handler. 2-conductor wire handles basic heating-only or cooling-only systems.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eSolid copper conductors for reliable signal transmission\u003c\/li\u003e\n\u003cli\u003eCL2-rated for in-wall installation per NEC code\u003c\/li\u003e\n\u003cli\u003e2 conductors — for basic heat or cool only\u003c\/li\u003e\n\u003cli\u003e250-foot spool — enough for most residential runs\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eGauge: 18 AWG\u003c\/li\u003e\n\u003cli\u003eConductors: 2\u003c\/li\u003e\n\u003cli\u003eLength: 250 feet\u003c\/li\u003e\n\u003cli\u003eRating: CL2 (in-wall rated)\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid copper\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eThermostat Wire 18\/2 250 Feet CL2 Solid Copper AC\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow many conductors do I need?\u003c\/h4\u003e\n\u003cp\u003e2-wire for heat only. 4-wire for basic heat\/cool. 5-wire for heat\/cool with common wire (needed for smart thermostats). 8-wire for heat pumps with auxiliary heat. When in doubt, run more conductors than you think you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use this wire for a smart thermostat like Nest or Ecobee?\u003c\/h4\u003e\n\u003cp\u003eYes, but smart thermostats require a \"C\" (common) wire, so you need at least 5 conductors (18\/5). If you currently have 18\/4, you may need to upgrade the wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs this rated for in-wall installation?\u003c\/h4\u003e\n\u003cp\u003eYes, CL2-rated wire is approved for permanent in-wall installation per the National Electrical Code.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the maximum run length?\u003c\/h4\u003e\n\u003cp\u003e18 AWG thermostat wire can run up to about 250 feet without voltage drop issues. For runs over 200 feet, consider using 16 AWG wire.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004088828275,"sku":"NHVAC-THER-K5D9LQ","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/7195gvRviuL._AC_SL1500.jpg?v=1781918151"},{"product_id":"thermostat-wire-18-4-50-feet-cl2-solid-copper-hvac","title":"Thermostat Wire 18\/4 50 Feet CL2 Solid Copper HVAC","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eThermostat Wire 18\/4 50 Feet CL2 Solid Copper HVAC\u003c\/h2\u003e\n    \u003cp\u003eThermostat Wire 18\/4 50 Feet CL2 Solid Copper HVAC — solid copper thermostat cable for connecting your thermostat to the furnace or air handler. 4-conductor wire handles basic heating-only or cooling-only systems.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eSolid copper conductors for reliable signal transmission\u003c\/li\u003e\n\u003cli\u003eCL2-rated for in-wall installation per NEC code\u003c\/li\u003e\n\u003cli\u003e4 conductors — for basic heat or cool only\u003c\/li\u003e\n\u003cli\u003e50-foot spool — enough for most residential runs\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eGauge: 18 AWG\u003c\/li\u003e\n\u003cli\u003eConductors: 4\u003c\/li\u003e\n\u003cli\u003eLength: 50 feet\u003c\/li\u003e\n\u003cli\u003eRating: CL2 (in-wall rated)\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid copper\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eThermostat Wire 18\/4 50 Feet CL2 Solid Copper HVAC\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow many conductors do I need?\u003c\/h4\u003e\n\u003cp\u003e2-wire for heat only. 4-wire for basic heat\/cool. 5-wire for heat\/cool with common wire (needed for smart thermostats). 8-wire for heat pumps with auxiliary heat. When in doubt, run more conductors than you think you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use this wire for a smart thermostat like Nest or Ecobee?\u003c\/h4\u003e\n\u003cp\u003eYes, but smart thermostats require a \"C\" (common) wire, so you need at least 5 conductors (18\/5). If you currently have 18\/4, you may need to upgrade the wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs this rated for in-wall installation?\u003c\/h4\u003e\n\u003cp\u003eYes, CL2-rated wire is approved for permanent in-wall installation per the National Electrical Code.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the maximum run length?\u003c\/h4\u003e\n\u003cp\u003e18 AWG thermostat wire can run up to about 250 feet without voltage drop issues. For runs over 200 feet, consider using 16 AWG wire.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004088893811,"sku":"NHVAC-THER-2J4TOA","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/7195gvRviuL._AC_SL1500_2beec4f8-66b0-4f45-97fd-0272ba93d073.jpg?v=1781918153"},{"product_id":"wire-nuts-assortment-160-piece-yellow-red-orange-tan-connector-kit","title":"Wire Nuts Assortment 160 Piece Yellow Red Orange Tan Connector Kit","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eWire Nuts Assortment 160 Piece Yellow Red Orange Tan Connector Kit\u003c\/h2\u003e\n    \u003cp\u003eWire Nuts Assortment 160 Piece Yellow Red Orange Tan Connector Kit — essential electrical component for HVAC system wiring and controls. Professional quality for reliable long-term operation. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eProfessional quality for HVAC electrical work\u003c\/li\u003e\n\u003cli\u003eCompatible with standard HVAC control systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eGauge: 18 AWG\u003c\/li\u003e\n\u003cli\u003eRating: CL2 (in-wall rated)\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid copper\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eWire Nuts Assortment 160 Piece Yellow Red Orange Tan Connector Kit\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow many conductors do I need?\u003c\/h4\u003e\n\u003cp\u003e2-wire for heat only. 4-wire for basic heat\/cool. 5-wire for heat\/cool with common wire (needed for smart thermostats). 8-wire for heat pumps with auxiliary heat. When in doubt, run more conductors than you think you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use this wire for a smart thermostat like Nest or Ecobee?\u003c\/h4\u003e\n\u003cp\u003eYes, but smart thermostats require a \"C\" (common) wire, so you need at least 5 conductors (18\/5). If you currently have 18\/4, you may need to upgrade the wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs this rated for in-wall installation?\u003c\/h4\u003e\n\u003cp\u003eYes, CL2-rated wire is approved for permanent in-wall installation per the National Electrical Code.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the maximum run length?\u003c\/h4\u003e\n\u003cp\u003e18 AWG thermostat wire can run up to about 250 feet without voltage drop issues. For runs over 200 feet, consider using 16 AWG wire.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004088926579,"sku":"NHVAC-THER-TVNJDC","price":14.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/61d53ciKLyL._AC_SL1500.jpg?v=1781918162"},{"product_id":"24v-transformer-wire-harness-18-awg-2-wire-quick-connect","title":"24V Transformer Wire Harness 18 AWG 2 Wire Quick Connect","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003e24V Transformer Wire Harness 18 AWG 2 Wire Quick Connect\u003c\/h2\u003e\n    \u003cp\u003e24V Transformer Wire Harness 18 AWG 2 Wire Quick Connect — essential electrical component for HVAC system wiring and controls. Professional quality for reliable long-term operation. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eProfessional quality for HVAC electrical work\u003c\/li\u003e\n\u003cli\u003eCompatible with standard HVAC control systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eGauge: 18 AWG\u003c\/li\u003e\n\u003cli\u003eRating: CL2 (in-wall rated)\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid copper\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003e24V Transformer Wire Harness 18 AWG 2 Wire Quick Connect\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow many conductors do I need?\u003c\/h4\u003e\n\u003cp\u003e2-wire for heat only. 4-wire for basic heat\/cool. 5-wire for heat\/cool with common wire (needed for smart thermostats). 8-wire for heat pumps with auxiliary heat. When in doubt, run more conductors than you think you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use this wire for a smart thermostat like Nest or Ecobee?\u003c\/h4\u003e\n\u003cp\u003eYes, but smart thermostats require a \"C\" (common) wire, so you need at least 5 conductors (18\/5). If you currently have 18\/4, you may need to upgrade the wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs this rated for in-wall installation?\u003c\/h4\u003e\n\u003cp\u003eYes, CL2-rated wire is approved for permanent in-wall installation per the National Electrical Code.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the maximum run length?\u003c\/h4\u003e\n\u003cp\u003e18 AWG thermostat wire can run up to about 250 feet without voltage drop issues. For runs over 200 feet, consider using 16 AWG wire.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004088959347,"sku":"NHVAC-THER-YI7RTL","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/61eWk7URL6L._AC_SL1500.jpg?v=1781918143"},{"product_id":"float-switch-condensate-safety-pan-overflow-24v-nc-ac-furnace","title":"Float Switch Condensate Safety Pan Overflow 24V NC AC Furnace","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eFloat Switch Condensate Safety Pan Overflow 24V NC AC Furnace\u003c\/h2\u003e\n    \u003cp\u003eFloat Switch Condensate Safety Pan Overflow 24V NC AC Furnace — essential electrical component for HVAC system wiring and controls. Professional quality for reliable long-term operation. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eProfessional quality for HVAC electrical work\u003c\/li\u003e\n\u003cli\u003eCompatible with standard HVAC control systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eGauge: 18 AWG\u003c\/li\u003e\n\u003cli\u003eRating: CL2 (in-wall rated)\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid copper\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eFloat Switch Condensate Safety Pan Overflow 24V NC AC Furnace\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow many conductors do I need?\u003c\/h4\u003e\n\u003cp\u003e2-wire for heat only. 4-wire for basic heat\/cool. 5-wire for heat\/cool with common wire (needed for smart thermostats). 8-wire for heat pumps with auxiliary heat. When in doubt, run more conductors than you think you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use this wire for a smart thermostat like Nest or Ecobee?\u003c\/h4\u003e\n\u003cp\u003eYes, but smart thermostats require a \"C\" (common) wire, so you need at least 5 conductors (18\/5). If you currently have 18\/4, you may need to upgrade the wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs this rated for in-wall installation?\u003c\/h4\u003e\n\u003cp\u003eYes, CL2-rated wire is approved for permanent in-wall installation per the National Electrical Code.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the maximum run length?\u003c\/h4\u003e\n\u003cp\u003e18 AWG thermostat wire can run up to about 250 feet without voltage drop issues. For runs over 200 feet, consider using 16 AWG wire.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004088992115,"sku":"NHVAC-THER-TH0HAU","price":14.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/61qTz2EwB1L._AC_SL1500_d2f762ac-0be1-4a86-a4f1-ffefd12b0f06.jpg?v=1781918149"},{"product_id":"wet-switch-flood-detector-24v-water-leak-sensor-ac-drain-pan","title":"Wet Switch Flood Detector 24V Water Leak Sensor AC Drain Pan","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eWet Switch Flood Detector 24V Water Leak Sensor AC Drain Pan\u003c\/h2\u003e\n    \u003cp\u003eWet Switch Flood Detector 24V Water Leak Sensor AC Drain Pan — essential electrical component for HVAC system wiring and controls. Professional quality for reliable long-term operation. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eProfessional quality for HVAC electrical work\u003c\/li\u003e\n\u003cli\u003eCompatible with standard HVAC control systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eGauge: 18 AWG\u003c\/li\u003e\n\u003cli\u003eRating: CL2 (in-wall rated)\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid copper\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eWet Switch Flood Detector 24V Water Leak Sensor AC Drain Pan\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow many conductors do I need?\u003c\/h4\u003e\n\u003cp\u003e2-wire for heat only. 4-wire for basic heat\/cool. 5-wire for heat\/cool with common wire (needed for smart thermostats). 8-wire for heat pumps with auxiliary heat. When in doubt, run more conductors than you think you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use this wire for a smart thermostat like Nest or Ecobee?\u003c\/h4\u003e\n\u003cp\u003eYes, but smart thermostats require a \"C\" (common) wire, so you need at least 5 conductors (18\/5). If you currently have 18\/4, you may need to upgrade the wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs this rated for in-wall installation?\u003c\/h4\u003e\n\u003cp\u003eYes, CL2-rated wire is approved for permanent in-wall installation per the National Electrical Code.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the maximum run length?\u003c\/h4\u003e\n\u003cp\u003e18 AWG thermostat wire can run up to about 250 feet without voltage drop issues. For runs over 200 feet, consider using 16 AWG wire.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004089057651,"sku":"NHVAC-THER-VSBZ9B","price":24.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/61qTz2EwB1L._AC_SL1500_9cb24f50-35ea-4f67-b348-598292949480.jpg?v=1781918160"},{"product_id":"condensate-pump-120v-mini-split-ac-22-feet-lift-silent","title":"Condensate Pump 120V Mini Split AC 22 Feet Lift Silent","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eCondensate Pump 120V Mini Split AC 22 Feet Lift Silent\u003c\/h2\u003e\n    \u003cp\u003eCondensate Pump 120V Mini Split AC 22 Feet Lift Silent — essential electrical component for HVAC system wiring and controls. Professional quality for reliable long-term operation. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eProfessional quality for HVAC electrical work\u003c\/li\u003e\n\u003cli\u003eCompatible with standard HVAC control systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eGauge: 18 AWG\u003c\/li\u003e\n\u003cli\u003eLength: 22 feet\u003c\/li\u003e\n\u003cli\u003eRating: CL2 (in-wall rated)\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid copper\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eCondensate Pump 120V Mini Split AC 22 Feet Lift Silent\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow many conductors do I need?\u003c\/h4\u003e\n\u003cp\u003e2-wire for heat only. 4-wire for basic heat\/cool. 5-wire for heat\/cool with common wire (needed for smart thermostats). 8-wire for heat pumps with auxiliary heat. When in doubt, run more conductors than you think you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use this wire for a smart thermostat like Nest or Ecobee?\u003c\/h4\u003e\n\u003cp\u003eYes, but smart thermostats require a \"C\" (common) wire, so you need at least 5 conductors (18\/5). If you currently have 18\/4, you may need to upgrade the wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs this rated for in-wall installation?\u003c\/h4\u003e\n\u003cp\u003eYes, CL2-rated wire is approved for permanent in-wall installation per the National Electrical Code.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the maximum run length?\u003c\/h4\u003e\n\u003cp\u003e18 AWG thermostat wire can run up to about 250 feet without voltage drop issues. For runs over 200 feet, consider using 16 AWG wire.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004089090419,"sku":"NHVAC-THER-DKPRMU","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/61sqzKEwo-L._AC_SL1500.jpg?v=1781918145"},{"product_id":"condensate-pump-replacement-120v-65-gph-ac-furnace-universal","title":"Condensate Pump Replacement 120V 65 GPH AC Furnace Universal","description":"\u003cdiv class=\"product-content\"\u003e\n  \u003cdiv class=\"product-description\"\u003e\n    \u003ch2\u003eCondensate Pump Replacement 120V 65 GPH AC Furnace Universal\u003c\/h2\u003e\n    \u003cp\u003eCondensate Pump Replacement 120V 65 GPH AC Furnace Universal — essential electrical component for HVAC system wiring and controls. Professional quality for reliable long-term operation. Ships same-day from Houston.\u003c\/p\u003e\n    \u003ch3\u003eKey Features\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eProfessional quality for HVAC electrical work\u003c\/li\u003e\n\u003cli\u003eCompatible with standard HVAC control systems\u003c\/li\u003e\n\u003cli\u003eEasy installation\u003c\/li\u003e\n\u003cli\u003eShips same-day from Houston\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eSpecifications\u003c\/h3\u003e\n    \u003cul\u003e\n\u003cli\u003eGauge: 18 AWG\u003c\/li\u003e\n\u003cli\u003eRating: CL2 (in-wall rated)\u003c\/li\u003e\n\u003cli\u003eMaterial: Solid copper\u003c\/li\u003e\n\u003c\/ul\u003e\n    \u003ch3\u003eWhat's Included\u003c\/h3\u003e\n    \u003cul\u003e\u003cli\u003eCondensate Pump Replacement 120V 65 GPH AC Furnace Universal\u003c\/li\u003e\u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eShips same-day\u003c\/strong\u003e from our Houston warehouse on orders placed before 3PM CST.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"product-faq\"\u003e\n    \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n    \u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow many conductors do I need?\u003c\/h4\u003e\n\u003cp\u003e2-wire for heat only. 4-wire for basic heat\/cool. 5-wire for heat\/cool with common wire (needed for smart thermostats). 8-wire for heat pumps with auxiliary heat. When in doubt, run more conductors than you think you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use this wire for a smart thermostat like Nest or Ecobee?\u003c\/h4\u003e\n\u003cp\u003eYes, but smart thermostats require a \"C\" (common) wire, so you need at least 5 conductors (18\/5). If you currently have 18\/4, you may need to upgrade the wire.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eIs this rated for in-wall installation?\u003c\/h4\u003e\n\u003cp\u003eYes, CL2-rated wire is approved for permanent in-wall installation per the National Electrical Code.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eWhat is the maximum run length?\u003c\/h4\u003e\n\u003cp\u003e18 AWG thermostat wire can run up to about 250 feet without voltage drop issues. For runs over 200 feet, consider using 16 AWG wire.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63004089123187,"sku":"NHVAC-THER-1H09ZM","price":48.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/61sqzKEwo-L._AC_SL1500_0b18d0ef-b453-4214-ba47-816c39a384fe.jpg?v=1781918147"}],"url":"https:\/\/nationalhvacparts.com\/collections\/thermostat-wire-electrical.oembed","provider":"National HVAC Parts","version":"1.0","type":"link"}