Independent Review · Updated June 2026

4 Ton 14 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Heat Pump System - Downflow

96% AFUE gas furnace paired with 14 SEER heat pump for year-round efficiency

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
4 Ton 14 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Heat Pump System - Downflow
Current Price
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// Bottom Line
This ACiQ system excels for contractors and homeowners upgrading older Goodman equipment, offering strong heating efficiency at 96% AFUE and respectable cooling at 14 SEER. The downflow configuration and PVC exhaust compatibility make it a practical retrofit choice for existing installations.

Review

The ACiQ ACIQ-48-EHPD-UPG combines a Goodman gas furnace with integrated heat pump functionality in a compact downflow A-coil configuration. Rated at 4 tons for cooling and 5 tons for heating capacity, this system targets contractors managing equipment replacements and homeowners transitioning from traditional furnace-only setups. The downflow design suits attic or basement installations where horizontal ductwork dominates, making it a practical choice for retrofit applications across varied home configurations.

Performance metrics are straightforward and competitive. The gas furnace delivers 100,000 BTU at 96% AFUE efficiency, meaning minimal energy loss during heating season. The heat pump side contributes 46,000 BTU of cooling capacity with 14 SEER1 rating, qualifying for Energy Star recognition. The scroll compressor operates as single-stage, which prioritizes reliability over modulating efficiency. Multi-speed blower control up to 2,000 CFM allows operators to balance airflow with noise considerations, though the 74 dB operating level remains moderately audible in living spaces.

Pros & Cons

Pros

  • Exceptional heating efficiency at 96% AFUE, delivering 100,000 BTU with minimal fuel waste
  • 14 SEER cooling efficiency meets Energy Star standards with R454B refrigerant for environmental compliance
  • Multi-speed blower motor provides flexible airflow control up to 2,000 CFM for balanced comfort
  • 5-ton cooling capacity with single-stage scroll compressor ensures reliable operation in varied climates
  • 10-year warranty with online registration covers manufacturing defects and provides contractor peace of mind

Cons

  • 74 dB noise level is moderately loud for residential settings, particularly during heating cycles
  • Single-stage compressor and burner design lack modulation efficiency of higher-end variable capacity systems
  • Requires 26.4 to 40 amp breaker, demanding proper electrical infrastructure that older homes may lack

Who Should Buy

Best For

Contractors replacing failed Goodman GSZ140491 units will appreciate the direct compatibility and streamlined installation. Homeowners in moderate climates seeking balanced heating and cooling performance without premium pricing will find good value in this 4-ton system.

Consider Alternatives If

Those prioritizing ultra-quiet operation or living in high-cooling-demand regions should explore variable-capacity heat pumps rated above 15 SEER.

4 Ton 14 SEER 96% AFUE 100,000 BTU Goodman Gas Fur
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Installation

Installation requires standard HVAC practices for downflow systems. The unit accepts 3/8 inch liquid lines and 1 1/8 inch suction lines with factory-supplied 1/2 inch insulation rated for 50-foot runs. Electrical connections use 115V single-phase 60Hz power with breaker sizing between 26.4 and 40 amps, depending on local code. PVC exhaust venting simplifies ductwork compared to metal alternatives. Sweat valve connections demand soldering competency or professional installation.

Warranty & Reliability

ACiQ provides 10-year coverage on parts and labor when you register the unit online. This warranty protects against compressor failure, heat exchanger cracks, and component defects, but excludes wear items like filters and refrigerant top-ups. Registration is quick and often unlocks rebate eligibility mentioned in product documentation, adding real financial value beyond the warranty itself.

Specifications

SKUACIQ-48-EHPD-UPG
Brand/ManufacturerACiQ
Cooling BTU46,000
Heating BTU100,000
RefrigerantR454B
Electrical115 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)74
Weight (in lbs)120.000000
FeatureSpec
ReplacesGSZ140491
Product FeaturesRebate Available
Energy StarYes
SEER1 (Efficiency)14
Condenser StagesSingle Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size40 amps
Min. Breaker Size26.4 amps
Tonnage5 Ton
Valve TypeSweat
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 Line1 1/8"
StyleA-Coil
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Furnace Efficiency / AFUE96%
Blower MotorMulti Speed
Maximum CFM2000
Flue LocationRight
Burner StagesSingle
Fuel TypeGas
Suction Line Insulation Thickness1/2"
Length50 feet

Frequently Asked Questions

How does this system compare to standard furnace-only equipment? +
This hybrid design operates the gas furnace primary in winter while the heat pump assists during mild weather, reducing gas consumption and lowering winter utility bills by 15-25% depending on climate. You get redundancy, too: if the heat pump fails, the furnace continues heating. Single-stage components sacrifice modulating efficiency for simplicity and cost.
Will this fit my existing Goodman installation? +
If you're replacing a GSZ140491 unit, compatibility is nearly guaranteed. The downflow A-coil configuration, sweat valve connections, and 50-foot line set length match typical retrofit scenarios. Verify your breaker capacity supports the 26.4 to 40 amp range before ordering, and confirm PVC exhaust venting availability in your installation space.
Is 14 SEER adequate for hot climates? +
14 SEER is moderate, not premium. In high-cooling regions with 3,000+ annual cooling hours, systems rated 15-17 SEER deliver superior efficiency and lower summer bills. This unit shines in transitional climates where heating demands exceed cooling, or where budget constraints outweigh marginal efficiency gains.
What makes this better or worse than a 14 SEER traditional heat pump without gas? +
Gas backup ensures heating works below 30-35°F ambient without auxiliary resistance elements, saving money in cold snaps. The tradeoff: gas furnace maintenance and annual inspection. Pure heat pumps eliminate this burden but cost more to operate in freezing climates without backup heating.
Do I need online registration for warranty coverage? +
Yes. Registration is mandatory to unlock the full 10-year warranty. The process takes minutes on ACiQ's website and often qualifies you for manufacturer rebates, making it worth completing immediately after installation.

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