Goodman 100000 BTU 80% Efficiency Two Stage Gas Furnace | Variable-Speed ECM Upflow / Horizontal | R32 (GRVT801005CN)
Check current price on AC Direct →
Key features
- 100,000 BTU two-stage gas valve for full and partial heat output
- 80% AFUE mid-efficiency rating with single-pipe B-vent compatibility
- Variable-speed ECM blower motor for quieter, lower-electricity air delivery
- Upflow and horizontal configuration for basement, closet, or attic installs
- Compatible with existing metal flue systems, no condensate drain required
- Qualifies for Goodman's 10-year parts limited warranty with registration
About this system
The Goodman GRVT801005CN is a 100,000 BTU, 80% AFUE two-stage gas furnace built for upflow or horizontal installation. The two-stage gas valve fires at a lower output during mild weather and ramps to full capacity on the coldest days, which reduces temperature swings, lowers fuel consumption compared to single-stage operation, and cuts down on the hard on-off cycling that puts wear on heat exchangers over time. The variable-speed ECM blower motor pairs with that staging to move air more consistently and quietly than a standard PSC motor, and it draws significantly less electricity in its lower-speed modes, which shows up on utility bills over a heating season.
At 80% AFUE this furnace is a mid-efficiency unit, meaning roughly 20 cents of every dollar in gas exits through the flue rather than heating your home. That trade-off comes with a practical upside: single-pipe venting through an existing B-vent or metal flue is straightforward, and there is no condensate drain line to run or freeze-protect. It is a sensible choice for homeowners in moderate climates, rentals, or replacements where running PVC condensate lines would add significant labor cost. Buyers in very cold climates who run their furnace hard from November through March will find a 95-plus AFUE unit pays back its price premium faster in fuel savings. The R-32 refrigerant designation on the model number is a Goodman internal coding convention and does not indicate this furnace uses refrigerant; it is a gas heating-only component.
This model lands in the upper tier of Goodman’s furnace lineup thanks to its two-stage operation and ECM motor, though it still carries the brand’s characteristic value pricing, typically 15 to 25 percent below a comparable Carrier, Trane, or Lennox furnace. It suits homeowners who want upgraded comfort features without paying premium-brand prices, provided they budget for professional installation by a qualified technician, since Goodman’s real-world longevity depends heavily on install quality.
The GRVT801005CN gives budget-conscious buyers genuine comfort upgrades, specifically two-stage firing and a variable-speed ECM motor, at a price point well below comparable Carrier or Trane hardware. The 80% AFUE rating is honest and appropriate for mild-to-moderate climates or retrofit situations where high-efficiency venting is impractical, but buyers in cold climates should model fuel savings against a 95-plus AFUE alternative before committing. Long-term satisfaction hinges more on who installs it than on the equipment itself.
Overall score is the average of the five ratings above.
What we like
- Two-stage operation reduces temperature swings and short-cycling compared to single-stage furnaces
- ECM variable-speed motor cuts electricity draw at lower speeds and runs noticeably quieter
- 80% AFUE allows simpler single-pipe metal flue venting, reducing installation complexity and cost
- Priced 15 to 25 percent below comparable Carrier, Trane, and Lennox models at similar feature levels
- 10-year parts limited warranty with registration is competitive for the value-brand category
Trade-offs
- 80% AFUE loses meaningful fuel efficiency versus 95-plus AFUE alternatives in climates with long heating seasons
- Dual-run capacitors and blower components are the most commonly reported failure points after year 7, per owner reviews
- Brand reliability ratings are mixed, with ConsumerAffairs averaging around 2.5 out of 5, driven by repair-cost complaints in older units
- Longevity depends heavily on installation quality, so a low-bid install can undercut the value proposition entirely
What homeowners and pros say about Goodman
Homeowners who choose Goodman furnaces most often point to affordability as the deciding factor, and that tracks with Google dealer reviews that average around 3.8 out of 5, where lower purchase price comes up repeatedly as a reason for satisfaction. The picture gets more complicated in long-term ownership data. ConsumerAffairs, a channel skewed toward people motivated to leave a review after a problem, scores Goodman at roughly 2.5 out of 5, and the recurring complaint is repair costs climbing after roughly year 7. For the GRVT801005CN specifically, the components most likely to need attention over time are the dual-run capacitors, which are the most commonly documented failure point across Goodman equipment and usually a low-cost repair, and the blower motor assembly. Neither is unusual for the category, but buyers should factor a service budget into the total cost of ownership.
HVAC technicians who work on Goodman equipment regularly tend to hold a pragmatic view: the hardware is adequate, the price is genuinely lower than Trane, Carrier, or Lennox equivalents, and the install is where the real risk lives. A rushed or undersized installation erodes whatever value the lower equipment price provided. Compressor lifespans on Goodman systems average 10 to 14 years in documented owner experience, compared to 15 to 20 years for premium-brand compressors, though this furnace is heating-only and that comparison applies more directly to paired cooling equipment. For the GRVT801005CN, the two-stage gas valve and ECM blower are real upgrades over basic single-stage hardware, and they hold up to scrutiny. The honest caveat is that the brand’s reliability ceiling is lower than the premium tier, and that gap tends to show up in the second decade of ownership.
Sources: ConsumerAffairs Goodman owner reviews, AHRI Directory of Certified Product Performance, U.S. DOE appliance and equipment efficiency standards, Goodman product specification sheets.
How it compares
| Brand | Comparable model | SEER2 | Stage | Price position |
|---|---|---|---|---|
| Goodman | GRVT801005CN | N/A (gas furnace) | Two-stage | Value pick |
| Carrier | Performance 80 (58TP Series) | N/A (gas furnace) | Two-stage | Typically 20 to 25 percent more than this Goodman |
| Trane | S8X2 80% Two-Stage | N/A (gas furnace) | Two-stage | Typically 20 to 30 percent more than this Goodman |
| Lennox | ML180 80% Two-Stage | N/A (gas furnace) | Two-stage | Typically 25 to 35 percent more than this Goodman |
Competitor rows are comparable single-stage units at similar efficiency; price is relative position, not a quote.
Questions about this system
Can this furnace use my existing metal B-vent flue, or do I need new venting?
Yes. At 80% AFUE this is a non-condensing furnace, so it vents through a standard metal B-vent or existing masonry flue liner. You do not need PVC condensate venting or a drain line, which often simplifies a replacement install significantly.
What does two-stage actually mean day to day, and is it worth it over a single-stage?
Two-stage means the gas valve fires at a reduced output, typically around 65 percent of full capacity, during mild weather and only ramps to 100 percent on the coldest days. In practice this means fewer temperature swings, longer and quieter run cycles, and somewhat lower gas consumption compared to a single-stage unit that always fires at full blast.
What are the most common repairs on Goodman furnaces, and what do they cost?
Dual-run capacitors are the most frequently reported failure point on Goodman equipment and are generally a straightforward fix in the 300 to 600 dollar range. Blower motor and control board issues also show up in owner feedback, particularly after year 7, which aligns with the repair-cost complaints that pull Goodman's ConsumerAffairs score to around 2.5 out of 5.
Does the variable-speed ECM blower actually save money on electricity?
ECM motors are meaningfully more efficient than standard PSC motors, especially at lower speeds where they spend most of their run time. The savings vary by climate and runtime, but the efficiency advantage is real and documented, not just a marketing claim.
How important is the installer for a Goodman furnace versus a premium brand?
Very important. HVAC technicians consistently cite installation quality as the biggest variable in how long any Goodman unit lasts and how reliably it operates. Proper sizing, correct airflow setup, and tight gas connections matter more here than on brands with tighter factory tolerances, so getting multiple bids from licensed contractors and not simply choosing the lowest price is genuinely worthwhile.
Specifications
| Furnace output | 100000 BTU |
| Configuration | Upflow |
| Refrigerant | R-32 |
| Model | GRVT801005CN |