3.5 Ton 13 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow Review 2026

// Bottom Line

This system works best for homeowners in moderate climates replacing aging equipment who want solid efficiency gains without premium pricing. The 96% AFUE furnace and 13 SEER cooler deliver measurable utility savings while the variable-speed blower and two-stage burner provide comfort and flexibility.

Review

This Goodman combo system represents the practical middle ground in residential HVAC. At $3,136 installed base price, it positions itself below premium brands like Lennox yet delivers respectable efficiency credentials. The 3.5-ton sizing covers average homes, while the downflow A-coil configuration matches existing ductwork in most installations. ACiQ and Goodman's shared manufacturing heritage means real parts availability and contractor familiarity across the market.

The numbers tell a straightforward story. The furnace burns at 96% AFUE, translating to roughly $150-250 annual heating savings versus 85% units depending on local gas costs. Cooling delivers 42,000 BTU at 13 SEER1 efficiency, handling 3.5 tons of capacity with a reciprocating compressor. Variable-speed ECM blower means the system ramps output from 400 CFM quiet operation to 2,000 CFM peak, reducing energy waste during part-load hours. Two-stage burner prevents aggressive cycling in mild weather, maintaining tighter temperature swings.

Pros & Cons

Pros

96% AFUE furnace efficiency reduces heating costs significantly compared to 80-90% units
13 SEER cooling rating qualifies for Energy Star certification and utility rebates
Variable-speed ECM blower motor runs at lower speeds for whisper-quiet operation and better humidity control
Two-stage burner allows modulation, reducing short-cycling and improving comfort consistency
Downflow configuration fits standard installations in basements or crawlspaces without costly ductwork modifications

Cons

Single-stage compressor on cooling side means less precise capacity modulation than variable-speed alternatives
75 dB noise level is acceptable but not class-leading for cooler operation
10-year warranty requires online registration, creating a small administrative hurdle for some homeowners

Who Should Buy

Best For

Homeowners replacing 15+ year old furnace and cooler systems in homes with standard ductwork and moderate climate demands. This unit fits nicely for contractors serving suburban markets where clients want efficiency upgrades without paying for ultra-premium SEER2 ratings or communicating systems.

Consider Alternatives If

Anyone needing variable-capacity cooling for hot, humid climates should look at dual-stage or inverter-driven compressors, and users seeking ultra-high efficiency should consider 15+ SEER2 systems despite higher upfront costs.

3.5 Ton 13 SEER 96% AFUE 120,000 BTU Goodman Gas F

$3136

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Installation

The downflow orientation demands the coil sits above the furnace, so installation space must accommodate 34.5 inches height plus ducting clearance. Suction line runs 7/8 inch diameter while liquid line uses 3/8 inch sweat valves, standard for residential work. PVC exhaust venting is required, eliminating expensive masonry chimney modifications. Most installations complete within one day for experienced crews familiar with Goodman platforms.

Warranty & Reliability

The 10-year parts warranty covers manufacturing defects, though registration via Goodman's website is mandatory and occasionally creates claim friction. Labor coverage typically comes separately through installation contractors. This duration trails some rivals offering 12-15 years, but matches Goodman's historical standard. Homeowner transferability depends on contractor documentation.

Specifications

SKU	ACIQ-4X-EHPD-UPG
Brand/Manufacturer	ACiQ
Cooling BTU	42,000
Heating BTU	120,000
Refrigerant	R410A
Electrical	115 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	75
Weight (in lbs)	120.000000
Feature	Spec
Energy Star	Yes
SEER1 (Efficiency)	13
Condenser Stages	Single Stage
Compressor Type	Reciprocating
Liquid Line	3/8"
Suction Line	7/8"
Liquid Valve Size	3/8"
Max Breaker Size	40 amps
Min. Breaker Size	23.9 amps
Tonnage	5 Ton
Valve Type	Sweat
Height	34.5"
Width	24.5"
Depth	28.75"
Resources	Goodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User Information Goodman Warranty You will need AdobeÂ® AcrobatÂ® Reader to view PDF documents.
Safety Information	PROPOSITION 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.
Configuration	Downflow/Horizontal
Style	A-Coil
AHRI Certificate Number	7368845
Airflow Direction	Downflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Product Features	Rebate Available
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	2000
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

Does 13 SEER1 still qualify for utility rebates in 2024? +

Yes, Energy Star certification confirms eligibility for most regional rebates, though SEER2 equivalency (roughly 10.5 SEER2) now dominates new incentive programs. Check local utilities, as 13 SEER1 units often earn $300-500 cooler rebates while newer SEER2 tiers command premium incentives. Budget accordingly for long-term ROI calculations.

Can this downflow unit replace a horizontal side-exit cooler? +

Yes, Goodman explicitly rates this for downflow and horizontal installations. Verify furnace plenum orientation and ensure return ductwork accommodates horizontal inlet if your current setup runs that way. A qualified HVAC tech should confirm clearances and filter rack positioning before ordering.

How does 96% AFUE compare to condensing furnaces? +

96% AFUE is condensing technology, extracting latent heat from exhaust gases. It's the modern standard for gas furnaces. Older 80-85% units waste significant heat up the chimney. At 15,000 heating hours annually, 96% saves 1,500-2,000 therms yearly versus 85% baseline units.

Is single-stage cooling adequate or should I upgrade to variable-speed? +

Single-stage compressors run full-bore or off, creating more temperature swings than modulating units. For moderate climates, this works fine and saves $800-1,200 upfront. Hot-humid regions benefit from variable-speed cooling's constant dehumidification, but this system suits northern and transitional zones well.

What happens if I don't register the warranty online? +

Goodman requires online registration within 30-90 days for full coverage. Missing this window voids the warranty unless you have proof of original installation. The process takes 10 minutes on their website and prevents costly surprises.

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