Review
The ACiQ 3.5 ton downflow system pairs a Goodman gas furnace with an air conditioning condenser to deliver whole-home climate control in a single package. This unit occupies a practical market position between basic efficiency models and premium variable-capacity systems. The downflow A-coil configuration makes it particularly suited for basement installations where horizontal airflow works well. With Energy Star certification and mid-range pricing, this system targets homeowners balancing efficiency improvements against budget constraints.
Heating performance reaches 80,000 BTU with a 97% AFUE rating, meaning nearly all fuel converts to usable warmth. The modulating burner stages adjust output automatically rather than cycling on and off, reducing temperature fluctuations and improving comfort. Cooling delivers 42,000 BTU at 14 SEER with a scroll compressor running at single-stage capacity. The variable-speed ECM blower motor reaches 1600 CFM maximum and adapts to system demands rather than running at constant speed, optimizing both comfort and efficiency throughout the year.
Pros & Cons
Pros
- 97% AFUE furnace rating means only 3% energy loss, among the highest available for gas furnaces
- 14 SEER cooling efficiency with single-stage scroll compressor provides reliable performance and Energy Star certification
- Modulating burner stages adjust heating output precisely, reducing temperature swings and fuel consumption
- Variable-speed ECM blower motor supports up to 1600 CFM and optimizes airflow for comfort
- Downflow A-coil configuration suits basements and tight installation spaces effectively
- PVC exhaust flue allows flexible venting without expensive masonry or metal ducting
Cons
- Single-stage compressor cannot modulate cooling capacity, leading to less precise temperature control than two-stage alternatives
- 73 dB noise level runs slightly louder than premium competitors during full-capacity operation
- Tonnage mismatch in specs creates confusion, listing both 3.5 and 5 ton ratings inconsistently
Who Should Buy
Best For
Homeowners in moderate climates seeking cost-effective high efficiency, particularly those with basements or tight installation spaces where downflow configuration works well. Budget-conscious buyers who value measurable utility savings over premium features will appreciate this system's heating and cooling performance per dollar spent.
Consider Alternatives If
Buyers in extreme heating climates requiring emergency heat backup capability, or those wanting the quietest operation and most precise cooling modulation should compare two-stage compressor alternatives instead.
Installation
This downflow system requires 115V single-phase 60 Hz power with a 22 to 35 amp breaker, standard for most homes. PVC exhaust venting simplifies installation compared to metal flue requirements on older furnaces. The unit dimensions measure 34.5 inches tall, 21 inches wide, and 28.75 inches deep, fitting standard basement or closet spaces. Refrigerant line sizes of 3/8 inch liquid and 7/8 inch suction are compatible with common field lines and insulation materials.
Warranty & Reliability
ACiQ provides 10 years of parts coverage with online registration, protecting against manufacturing defects and component failures common in early system life. This warranty term matches industry standards for residential equipment. Registration is straightforward and typically completed during professional installation. Homeowners should retain documentation and receipts to validate warranty claims if needed.
Specifications
| SKU | ACIQ-4X-EHPD-UPG |
| Brand/Manufacturer | ACiQ |
| Cooling BTU | 42,000 |
| Heating BTU | 80,000 |
| Refrigerant | R410A |
| Electrical | 115 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 73 |
| Weight (in lbs) | 120.000000 |
| Feature | Spec |
| Energy Star | Yes |
| SEER1 (Efficiency) | 14 |
| Condenser Stages | Single Stage |
| Compressor Type | Scroll |
| Liquid Valve Size | 3/8" |
| Suction Valve Size | 7/8" |
| Max Breaker Size | 35 amps |
| Min. Breaker Size | 22 amps |
| Tonnage | 5 Ton |
| Height | 34.5" |
| Width | 21" |
| 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 Adobe® Acrobat® 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 |
| Liquid Line | 3/8" |
| Suction Line | 7/8" |
| Style | A-Coil |
| AHRI Certificate Number | 7424271 |
| Airflow Direction | Downflow/Horizontal |
| Exhaust Flue Requirement | Plastic / PVC |
| Product Features | Rebate Available |
| Furnace Efficiency / AFUE | 97% |
| Blower Motor | Variable Speed - ECM |
| Maximum CFM | 1600 |
| Flue Location | Right |
| Burner Stages | Modulating |
| Fuel Type | Propane, Natural Gas |
| Suction Line Insulation Thickness | 3/8" |
| Length | 30 feet |
Frequently Asked Questions
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