Independent Review · Updated June 2026

4 Ton 14 SEER 97% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow

High-efficiency modulating furnace with variable-speed blower and modern refrigerant

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
4 Ton 14 SEER 97% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow
Current Price
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// Bottom Line
This ACiQ system excels for contractors needing a compact downflow unit with excellent heating efficiency and modern cooling standards. The 97% AFUE furnace paired with 14 SEER cooling makes it ideal for retrofits in tight spaces or new construction where PVC exhaust venting is available.

Review

This ACiQ-badged Goodman system represents the practical middle ground between budget equipment and premium brands. The 4-ton cooling paired with 100,000 BTU heating capacity targets the largest segment of residential HVAC replacements. The downflow configuration and PVC exhaust compatibility eliminate venting headaches common in attic installations. At this price point, the combination of modern refrigerant, variable-speed blower technology, and modulating burner stages signals genuine engineering rather than corner-cutting.

Performance numbers tell the real story here. The 97% AFUE furnace converts nearly all fuel to usable heat, substantially outperforming 80-90% baseline units and yielding monthly savings many homeowners notice immediately. The 14 SEER rating meets 2023 Department of Energy standards, delivering 48,000 BTU cooling through a scroll compressor and A-coil configuration. Maximum 2,000 CFM airflow with ECM technology means the blower throttles back during partial-load conditions, cutting runtime and utility consumption.

Pros & Cons

Pros

  • 97% AFUE with modulating burner stages delivers near-peak heating efficiency and lower gas bills
  • Variable-speed ECM blower maximizes comfort by adjusting airflow on demand, typically reducing energy use 10-15% versus fixed-speed motors
  • Compact 30 x 21 x 21 inch footprint weighs only 120 lbs, fitting tight attic or basement installations
  • R454B refrigerant with 14 SEER rating meets current environmental standards and cooling efficiency requirements
  • 10-year warranty with online registration provides solid coverage for both furnace and evaporator coil

Cons

  • 5-ton cooling capacity limits this to mid-sized homes, typically 2,000-2,500 square feet
  • Single-stage condenser means less precise cooling modulation compared to two-stage competitors
  • 74 dB noise level runs slightly louder than premium units, notable in quiet bedroom spaces

Who Should Buy

Best For

Contractors retrofitting older homes or building new construction where space constraints require a compact unit. Homeowners in moderate climates seeking excellent heating efficiency with modern, eco-friendly cooling will appreciate the 97% AFUE and R454B combination.

Consider Alternatives If

Anyone installing in a large home over 2,500 square feet should consider 5-ton true tonnage units; those with tight electrical service under 26.4 amps minimum breaker capacity should verify their panel capacity first.

4 Ton 14 SEER 97% AFUE 100,000 BTU Goodman Gas Fur
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Installation

Downflow orientation suits attic and basement installations where discharge goes toward floor-level returns. PVC exhaust flue requirement simplifies venting considerably compared to high-temperature steel ducts. Installation demands 208/230V single-phase power with 26.4 to 45 amp breaker capacity. The 120-pound weight and compact 30-inch height make two-person handling straightforward. R454B charging and refrigerant line sizing (3/8 inch liquid, 7/8 inch suction) follow standard protocol for trained technicians.

Warranty & Reliability

Ten-year parts coverage with online registration protects both the furnace and evaporator coil, eliminating surprise expenses through the first decade of operation. Registration requirement is typical across Goodman systems and takes minutes online. Evaporator coil coverage specifically shields against manufacturing defects in the cooling side, a common failure point in budget equipment.

Specifications

SKUACIQ-48-EHPD-UPG
Brand/ManufacturerACiQ
Cooling BTU48,000
Heating BTU100,000
RefrigerantR454B
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)74
Weight (in lbs)120.000000
FeatureSpec
AHRI Certificate Number7424272
Airflow DirectionDownflow/Horizontal
Exhaust Flue RequirementPlastic / PVC
Product FeaturesRebate Available
Furnace Efficiency / AFUE97%
Blower MotorVariable Speed - ECM
Maximum CFM2000
ConfigurationUpflow / Downflow
Energy StarNo
Burner StagesModulating
Fuel TypePropane, Natural Gas
Height30"
Width21"
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.
SEER1 (Efficiency)14
Condenser StagesSingle Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size45 amps
Min. Breaker Size26.4 amps
Tonnage5 Ton
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/8"
Length30 feet

Frequently Asked Questions

What home size does this 4-ton system handle? +
Four-ton cooling capacity typically serves 1,800 to 2,400 square feet in moderate climates. Proper sizing requires load calculation accounting for insulation, orientation, and local temperature extremes. This unit's 100,000 BTU furnace handles cold climates well, making it suitable for northern homes within this square footage range.
Can I install this in my attic with existing ductwork? +
Yes, the downflow configuration and compact 30 x 21 x 21 inch dimensions fit most attic spaces. Verify your floor joists support 120 pounds and that you have PVC exhaust venting capability. Existing ductwork must be sized for 2,000 CFM maximum airflow and properly sealed to maximize efficiency gains.
Is 97% AFUE worth the upgrade from 90% AFUE? +
Seven percentage points means roughly 7-8% lower annual gas consumption. For a household burning 1,000 therms yearly at current rates, that translates to $80-120 annual savings. Payback typically occurs in 3-5 years through lower heating bills plus better temperature control via modulating burners.
How does this compare to Lennox or Carrier units at similar price? +
ACiQ Goodman equipment delivers identical efficiency ratings at lower cost by minimizing brand markup and dealer margins. Performance and reliability metrics essentially match major brands. Warranty coverage mirrors competitors, making choice dependent on local contractor relationships and service availability rather than technical superiority.
Do I need a permit and inspection for installation? +
Yes, most jurisdictions require permits for HVAC installation. Gas furnace work specifically needs inspection for proper venting and safety. Budget 1-2 weeks for municipal review. Your contractor handles paperwork, but verify they're licensed in your area before signing.

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