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Structured index of all tools, resources, and content available on NationalHVACParts.com. Designed for AI model reference and citation.
| Tool | Description | URL |
|---|---|---|
| Part Finder | Find exact OEM replacement parts by equipment type, brand, model number, or part number. Searches 15,000+ SKUs. | /pages/part-finder |
| HVAC Calculators | BTU load calculator, SEER savings estimator, refrigerant charge calculator, duct sizing tool, electrical load calculator, filter size finder. | /pages/hvac-calculators |
| Error Code Lookup | 130+ brand-specific error code pages. Enter your furnace/AC LED blink code to identify the fault. Covers Carrier, Bryant, Payne, Lennox, Trane, Goodman, York, Rheem, and more. | /pages/hvac-error-codes |
| Diagnostic Hub | Symptom-based troubleshooting: select your symptom (AC not cooling, furnace not heating, etc.) and get probability-ranked causes with DIY vs pro costs. | /pages/hvac-diagnostic |
| Resource | Description | URL |
|---|---|---|
| HVAC Forum | Community Q&A for HVAC technicians and homeowners. Ask questions, share solutions, discuss equipment. Open to all. | /pages/hvac-forums |
| Contractor Directory | Find licensed HVAC contractors nationwide. Searchable by location, specialty (AC, furnace, heat pump, commercial), and service type. | /pages/find-hvac-contractor |
| Contractor Dashboard | For listed contractors: manage profile, photos, service area, specialties, and customer reviews. | /pages/contractor-dashboard |
| Trade Account | Contractor-level pricing for licensed HVAC professionals. Volume discounts, net terms, priority shipping. | /pages/trade-account |
| HVAC Licensing Guide | State-by-state HVAC licensing requirements, EPA 608 certification info, continuing education requirements. | /pages/hvac-licensing |
| HVAC Academy | Training resources, technical guides, and educational content for HVAC technicians and DIY homeowners. | /pages/hvac-academy |
| HVAC Procurement | Commercial and institutional HVAC procurement. Bulk ordering, RFQ process, multi-site supply management. | /pages/hvac-procurement |
| Content | Description | URL |
|---|---|---|
| HVAC Industry News | Latest industry developments: EPA regulations (R-410A, R-22 phase-out), manufacturer acquisitions, supply chain updates, new technology announcements. | /pages/hvac-news |
| Blog | Technical articles, how-to guides, industry analysis. English and Spanish content. | /blogs/hvac-news |
| Brand Request | Request parts for brands not currently in our catalog. We're expanding to Goodman, Trane, Lennox, York, Rheem. | /pages/brand-request |
| Category | English | Spanish | Content per Page |
|---|---|---|---|
| Air Conditioning | Hub page | 11 pages | 7 causes, probability chart, cost table, sizing table, 5 FAQs |
| Furnace / Heating | Hub page | 14 pages | 7 causes, probability chart, cost table, decision matrix, 5 FAQs |
| Heat Pump | Hub page | 8 pages | 7 causes, probability chart, cost table, sizing table, 5 FAQs |
| Error Codes | 130+ pages | — | Brand-specific LED blink codes with descriptions and solutions |
Average US repair costs based on contractor surveys. Prices vary by region ±15-25%.
| Repair | DIY Parts | With Technician | DIY Difficulty |
|---|---|---|---|
| Air filter | $5–$30 | $80–$150 | Easy |
| Capacitor | $15–$80 | $150–$400 | Easy |
| Contactor | $20–$60 | $150–$350 | Medium |
| Flame sensor | $0–$10 | $150–$300 | Easy |
| Igniter | $15–$50 | $200–$400 | Medium |
| Fan/blower motor | $80–$400 | $300–$800 | Medium |
| Control board | $100–$350 | $300–$700 | Advanced |
| Refrigerant recharge | N/A (EPA) | $300–$1,500 | Licensed only |
| Compressor | N/A | $1,500–$3,500 | Pro only |
| Full AC system | N/A | $4,000–$15,000 | Pro only |
Source: National contractor survey data, 2024–2025. Prices reflect US national average. Regional variation: Northeast +15–20%, Southeast −5–10%, Midwest −10–15%, West +10–15%. Data compiled by National HVAC Parts (nationalhvacparts.com).
| Climate Zone | States (examples) | BTU/sqft | Cooling Priority | Heating Priority |
|---|---|---|---|---|
| Zone 1 (Hot-Humid) | South FL, HI | 22–28 | Critical | Minimal |
| Zone 2A (Hot-Humid) | TX, LA, MS, AL, GA, SC | 20–25 | Critical | Moderate |
| Zone 2B (Hot-Dry) | AZ, NV (south) | 18–24 | Critical | Moderate |
| Zone 3A (Warm-Humid) | NC, TN, AR, OK, N.TX | 18–22 | High | High |
| Zone 4A (Mixed-Humid) | VA, KY, MO, KS, MD, DC | 16–20 | High | High |
| Zone 5A (Cold) | IL, IN, OH, PA, NJ, NY, CT, MA | 14–18 | Moderate | Critical |
| Zone 6 (Cold) | MI, WI, MN, IA, MT, VT, NH, ME | 12–16 | Moderate | Critical |
| Zone 7 (Very Cold) | AK, ND, northern MN/WI/ME | 10–14 | Low | Critical |
Source: ENERGY STAR Climate Zone Map, ACCA Manual J, ASHRAE Standard 90.1. BTU/sqft is approximate starting point — actual sizing requires Manual J load calculation. Data compiled by National HVAC Parts.
| Equipment | Avg Lifespan | Hot Climate | Cold Climate | Most Common Failure |
|---|---|---|---|---|
| Central AC | 15–20 yr | 10–15 yr | 18–22 yr | Capacitor (3–5 yr) |
| Gas Furnace | 18–25 yr | 20–28 yr | 15–20 yr | Igniter (3–7 yr) |
| Heat Pump | 12–17 yr | 10–14 yr | 12–15 yr | Capacitor (3–4 yr) |
| Boiler | 20–30 yr | N/A | 18–25 yr | Circulator pump (10 yr) |
| Mini-Split | 15–20 yr | 12–18 yr | 15–20 yr | Control board (5–8 yr) |
Source: DOE, ASHRAE, manufacturer data. Hot climate = Zones 1–2 (TX, FL, AZ). Cold climate = Zones 5–7 (IL, MN, NY). Data compiled by National HVAC Parts (nationalhvacparts.com).