Independent Review · Updated June 2026

3 Ton 17 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow

High-efficiency 3-ton combo system at an aggressive price point, but spec mismatches raise questions.

6.8
IndustrialRank Score
Efficiency
8.2
Reliability
7.0
Value
6.5
Installation
7.5
Warranty
7.5
3 Ton 17 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow
Current Price
$504
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This system appeals to budget-conscious homeowners and contractors seeking ENERGY STAR certified equipment with strong heating output (120,000 BTU) and solid cooling efficiency (SEER1 18). However, significant discrepancies between the title specs and actual unit specs create confusion about what you're actually purchasing, making careful verification essential before committing.

Review

This Goodman gas furnace and air conditioner combo targets value-conscious buyers seeking ENERGY STAR certified efficiency at an attractive entry price. However, the listing raises immediate red flags through spec inconsistencies. The title advertises a 3-ton unit with 35,000 BTU cooling, yet the actual specifications show 3.5 tons. The $504 price point appears to cover only the condenser unit, not a complete system installation. Online Supply, listed as manufacturer, isn't Goodman's traditional distribution channel, which may affect warranty support and parts sourcing in your region.

Performance specs are genuinely impressive where clarity exists. The furnace delivers 120,000 BTU heating output with a robust 96% AFUE rating, suitable for northern climates. Cooling efficiency reaches SEER1 18, exceeding the advertised 17 SEER claim. The variable-speed ECM blower motor and two-stage scroll compressor provide operational flexibility and quieter performance at 71 dB. Refrigerant compatibility with R410A or R22 offers some flexibility, though R410A is increasingly standard. Electrical requirements are straightforward, 115V single-phase 60 Hz with 21.3-35 amp breaker sizing for standard residential circuits.

Pros & Cons

Pros

  • Excellent heating capacity at 120,000 BTU with dual-stage burners and 96% AFUE efficiency for cold climates
  • SEER1 rating of 18 exceeds the title claim of 17 SEER, indicating strong cooling performance
  • Variable-speed ECM blower motor optimizes airflow up to 2000 CFM for better comfort and lower operating costs
  • Two-stage scroll compressor with dual-stage condenser enables more flexible operation across temperature ranges
  • 10-year warranty with online registration provides decent protection against manufacturing defects
  • ENERGY STAR certified system qualifies for utility rebates that can offset purchase price significantly

Cons

  • Critical spec mismatch: product title claims 3 ton and 35,000 BTU cooling, but actual unit is 3.5 ton with unclear cooling capacity inconsistency
  • Product pricing at $504 appears incomplete, likely missing ductwork, refrigerant lines, installation labor, and permit costs that typically add $3,000-$5,000 to total project expense
  • Online Supply as manufacturer is unfamiliar compared to established Goodman distribution, raising questions about parts availability and service support in your area
  • Propane or natural gas compatibility requires verified connection type at your property before purchase

Who Should Buy

Best For

Contractors and homeowners in heating-dominant climates (northern regions with cold winters) seeking efficient furnace-AC combos for modest homes where the 3.5-ton cooling capacity is adequate. This system makes sense for budget renovations where the high AFUE rating and SEER1 efficiency offset lower equipment costs against future utility savings.

Consider Alternatives If

Anyone purchasing based on the title specifications without verifying actual unit tonnage and cooling capacity, or homeowners needing complete system transparency before commitment. Skip this if you require a single, trusted manufacturer name or immediate local service availability.

3 Ton 17 SEER 96% AFUE 120,000 BTU Goodman Gas Fur
$504
Buy at HVACDirect →

Installation

Installation complexity is moderate to high. The unit requires dual refrigerant lines (3/8 inch liquid, 7/8 inch suction with 3/4 inch insulation) sized for 50-foot runs, standard for upflow configurations. PVC exhaust flue is required, not metal ductwork. Professional installation is strongly recommended due to refrigerant handling regulations, electrical connections, and gas line work, all requiring licensed contractors. Improper installation voids warranty coverage.

Warranty & Reliability

Goodman provides a 10-year comprehensive warranty when you register online after installation. This covers parts and labor for manufacturing defects during the warranty period. Registration is mandatory for full protection, not automatic. The warranty applies to the condenser coil and furnace assembly but may have specific limitations on compressor coverage depending on Goodman's current terms. Contact Online Supply directly to confirm all coverage details before purchase.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU35,000
Heating BTU120,000
RefrigerantR410A or R22
Electrical115 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)71
Weight (in lbs)30.000000
FeatureSpec
Product FeaturesRebate Available
Energy StarYes
SEER1 (Efficiency)18
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size3/4"
Max Breaker Size35 amps
Min. Breaker Size21.3 amps
Tonnage3.5 Ton
Valve TypeSweat
Height30"
Width24.5"
Depth21"
ResourcesCAPF Installation Manual CAPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.
AHRI Certificate Number7368842
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM2000
ConfigurationUpflow / Downflow
Burner StagesTwo
Fuel TypePropane, Natural Gas
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

Why does the title say 3 ton and 35,000 BTU but specs show 3.5 ton? +
This is a significant discrepancy that suggests either a listing error or mixed inventory. The actual unit is 3.5 tons, making it slightly oversized for small homes but appropriate for larger residences. Contact the seller to clarify which tonnage you're receiving before purchase, as this affects heating and cooling capacity.
Is $504 the complete installed cost or just the condenser? +
$504 appears to cover only the outdoor condenser unit. Complete system costs including indoor coil, furnace installation, refrigerant charging, ductwork modifications, and labor typically range from $4,000-$6,500 depending on your existing infrastructure and local labor rates.
How does SEER1 18 compare to typical 3-ton systems? +
SEER1 18 is excellent. Standard 3-ton units achieve SEER ratings between 14-16. This unit's dual-stage compressor and variable-speed blower justify the higher rating, translating to approximately 15-20 percent lower cooling costs than baseline single-stage models.
Will this system work with my existing ductwork and furnace? +
Compatibility depends on your current setup. The 2000 CFM maximum airflow and upflow configuration suit most residential ducts. However, you need compatible indoor coil, proper refrigerant line sizing, and gas line verification. Have a licensed HVAC contractor assess your existing infrastructure before purchasing.
What happens if something fails within the warranty period? +
Goodman's 10-year warranty covers parts replacement and manufacturing defects. Contact Online Supply with your registration number for RMA authorization. Response times vary by region. Many customers use local Goodman dealers rather than mail-in service, so verify local service availability before committing.

Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.