Independent Review · Updated June 2026

3.5 Ton 14 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow

High-efficiency gas furnace and AC combo with 96% AFUE and 14 SEER rating

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
3.5 Ton 14 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow
Current Price
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// Bottom Line
This 3.5-ton system pairs a 96% AFUE furnace with a 14 SEER air conditioner, making it ideal for homeowners in moderate climates seeking solid year-round efficiency without premium pricing. The two-stage burner and variable-speed ECM blower keep energy bills reasonable while delivering consistent comfort.

Review

The Goodman 3.5-ton gas furnace and air conditioner system delivers solid, dependable performance in a straightforward package. This downflow configuration works well for attics or crawl spaces above finished living areas. With a 96% AFUE rating on the furnace side and 14 SEER cooling efficiency, it sits comfortably in the mid-to-upper-efficiency range without commanding premium pricing. The unit qualifies for ENERGY STAR certification, appealing to cost-conscious homeowners who track their utility bills.

The furnace produces 100,000 BTU of heating output across two burner stages, while the air conditioner delivers 42,000 BTU of cooling capacity. The variable-speed ECM blower motor runs at 2000 CFM maximum and adjusts its speed based on heating or cooling demand, reducing unnecessary electricity draw. The scroll compressor is proven technology that handles R410A refrigerant reliably. Electrically, the system requires 115V single-phase power with a breaker between 22 and 35 amps, fitting standard residential circuits.

Pros & Cons

Pros

  • 96% AFUE furnace rating means 96 cents of every heating dollar becomes usable heat, well above the federal minimum of 90%
  • 14 SEER cooling efficiency qualifies for ENERGY STAR certification, reducing AC runtime costs noticeably over summer months
  • Two-stage gas burner adjusts heat output to actual demand, avoiding the constant on-off cycling of single-stage units
  • Variable-speed ECM blower motor reduces electricity consumption by running at optimal speeds rather than full blast constantly
  • 10-year warranty with online registration provides strong protection for a mid-range system

Cons

  • Single-stage air conditioner compressor cannot modulate cooling capacity, limiting part-load efficiency during mild weather
  • 73 dB noise level is audible from nearby rooms during operation, noticeable for light sleepers near the equipment
  • No SEER2 rating provided, making direct comparison difficult with newer systems tested under current standards

Who Should Buy

Best For

Homeowners in climates with distinct heating and cooling seasons who prioritize heating efficiency and want a balanced, cost-effective system. Contractors seeking an affordable high-efficiency combo unit for rental properties or budget-conscious residential retrofits.

Consider Alternatives If

Buyers in hot climates where AC runtime dominates should look at variable-capacity compressors for better part-load cooling efficiency.

3.5 Ton 14 SEER 96% AFUE 100,000 BTU Goodman Gas F
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Installation

Downflow configuration requires proper ductwork clearance below the unit, typically in attics or upper-story closets. Suction and liquid lines use 7/8-inch and 3/8-inch connections respectively, standard for 3.5-ton systems. PVC exhaust flue is required for the furnace, simplifying venting compared to metal alternatives. A-coil design sits inside the return air path. Installation time typically runs 4-6 hours for experienced HVAC crews.

Warranty & Reliability

The 10-year warranty covers parts and labor when you register online after installation. This is stronger protection than many budget systems offer and provides peace of mind if compressor or heat exchanger issues arise. Registration is straightforward through the manufacturer portal and is essential to activate full coverage.

Specifications

SKUACIQ-4X-EHPD-UPG
Brand/ManufacturerACiQ
Cooling BTU42,000
Heating BTU100,000
RefrigerantR410A
Electrical115 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)73
Weight (in lbs)120.000000
FeatureSpec
Energy StarYes
SEER1 (Efficiency)14
Condenser StagesSingle Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size35 amps
Min. Breaker Size22 amps
Tonnage5 Ton
Height34.5"
Width21"
Depth28.75"
ResourcesGoodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User Information Goodman 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.
ConfigurationDownflow/Horizontal
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
AHRI Certificate Number7368844
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE96%
Blower MotorVariable Speed - ECM
Maximum CFM2000
Burner StagesTwo
Fuel TypePropane, Natural Gas
Suction Line Insulation Thickness3/8"
Length30 feet

Frequently Asked Questions

How does the 96% AFUE rating translate to actual heating cost savings? +
A 96% AFUE furnace converts 96 cents of fuel into usable heat. If your old unit was 80% AFUE, you'd see roughly 16-20% lower heating costs over the season, depending on weather and usage. On a typical $1,200 winter bill, that could mean $200-250 in annual savings.
Is this system compatible with my existing ductwork? +
Likely yes, if your current system is also 3.5 tons and uses standard sheet metal ducts. The downflow configuration requires that ducts run below the unit, which works well in attics. Have a technician verify your ductwork diameter and return air plenum size before ordering.
What does 14 SEER mean for summer cooling bills? +
14 SEER is mid-range efficiency. For every 1,000 watts of power consumed, you get 14 BTU/hour of cooling. Higher SEER ratings (18-24) cost more upfront but run cooler months more cheaply. For moderate climates, 14 SEER provides reasonable summer energy costs without excessive equipment expense.
How does this compare to a Lennox XC21 at similar price points? +
The XC21 typically offers variable-capacity cooling and higher SEER ratings, 16-18 range. This Goodman prioritizes heating efficiency with its 96% AFUE two-stage burner. Choose Goodman if heating dominates your costs, Lennox if AC runtime is longer in your climate.
Will the 10-year warranty cover compressor failure? +
Yes, the compressor is covered for parts and labor under the full 10-year warranty when you register online. You must register within 30 days of installation to activate this coverage.

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