What are the specs for this Flue Collector Box?

The correct replacement for Goodman model GMN120-5 Furnace — 2820007S is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Goodman equipment which lists the model number GMN120-5 Furnace — 2820007S.

What symptoms indicate I need a new flue collector box?

Common symptoms that indicate you need a new flue collector box include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

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Goodman

OEM Goodman 24.5" Flue Collector Box for GMN120-5 Furnace — 2820007S

Name: OEM Goodman 24.5" Flue Collector Box for GMN120-5 Furnace — 2820007S
Brand: Goodman
SKU: GOODMAN-11601
Price: 155.95 USD
Availability: InStock

SKU: GOODMAN-11601 Brand: Goodman

$155.95 $202.95

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Goodman 2820007S 24.5" Flue Collector Box

The 2820007S is a genuine OEM 24.5-inch flue collector box for Goodman GMN120-5 gas furnaces. This component gathers combustion gases from the heat exchanger and channels them safely to the inducer and vent. Replace it when you find corrosion, cracks, rust-through, or evidence of flue-gas leakage — a compromised collector box is a combustion-safety issue that must not be ignored.

Length: 24.5 inches
Function: Combustion flue-gas collection
Material: Corrosion-resistant furnace-grade steel
Fits: Goodman GMN120-5 furnace
OEM Part: 2820007S

OEM vs. Generic

The OEM collector box is dimensionally matched to the GMN120-5 heat exchanger ports and gasket seats. Generic or aftermarket boxes rarely seal correctly and can create dangerous flue-gas leaks — for a combustion-path part, OEM is strongly advised.

Install Difficulty

Moderate to difficult. Requires furnace disassembly, gasket replacement, and a combustion/CO safety check after reassembly. Professional installation recommended.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

OEM Goodman 24.5" Flue Collector...

$155.95

Frequently Asked Questions

Does this Flue Collector Box fit my Goodman GMN120-5 Furnace — 2820007S?

Yes. This is the factory-specified OEM flue collector box for the Goodman GMN120-5 Furnace — 2820007S. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the flue collector box on my Goodman GMN120-5 Furnace — 2820007S?

Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.

What symptoms mean I need a new flue collector box?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this flue collector box compatible with Bryant or Payne too?

Many Goodman parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Goodman flue collector box?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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