Review
The ACiQ 4-ton downflow system bridges heat pump and furnace technology for contractors seeking affordable dual-fuel solutions. This unit pairs a 14 SEER1 cooling coil with a 100,000 BTU two-stage gas furnace, delivering year-round conditioning without requiring separate equipment. At 120 pounds and 34.5 inches tall, it fits tight equipment closets common in downflow installations. The system directly replaces the older Goodman GSZ140491, simplifying retrofit work and keeping compatibility within the Goodman ecosystem.
Performance specs reveal a capable but conventional design. The 46,000 BTU cooling capacity pairs with a single-stage scroll compressor running at 14 SEER1, meeting Energy Star requirements without cutting-edge efficiency. The two-stage gas burner operates at 80% AFUE, a baseline efficiency that keeps costs low but sacrifices the 10-15% savings offered by condensing furnaces. Electrical demands stay modest, requiring 26.4 to 40 amp breakers at 120V single-phase. The multi-speed blower motor handles up to 2,000 CFM, supporting flexible ductwork configurations.
Pros & Cons
Pros
- Energy Star certified with 14 SEER1 cooling efficiency, meeting current DOE standards
- Dual-fuel configuration delivers 100,000 BTU heating via two-stage gas burner plus 46,000 BTU heat pump cooling
- R454B refrigerant aligns with EPA phase-down requirements for future compliance
- Multi-speed blower motor optimizes comfort and reduces runtime noise at 74 dBA
- 10-year warranty with online registration provides substantial peace of mind coverage
Cons
- 80% AFUE gas efficiency lags behind high-efficiency condensing furnaces rated 90-98% AFUE
- Single-stage compressor cannot modulate cooling capacity, leading to cycling rather than smooth operation
- 5-ton unit oversizes the cooling capacity relative to 4-ton rating, creating potential humidity control issues
Who Should Buy
Best For
Homeowners in transitional climates needing backup gas heating and reliable cooling without premium pricing. Contractors replacing GSZ140491 units will appreciate the direct compatibility and straightforward installation path.
Consider Alternatives If
Buyers in consistently cold climates should pursue dedicated gas furnaces, while those in hot-humid regions need modulating compressors or higher SEER ratings for efficiency.
Installation
Downflow orientation suits attic or closet placement where return air flows from above. Requires metal exhaust flue, 3/8 inch liquid line, and 1 1/8 inch suction line with 1/2 inch insulation up to 50 feet. Sweat valve connections demand basic soldering skills or professional labor. Electrical integration involves standard 120V controls, manageable for experienced installers but requiring licensed work in most jurisdictions.
Warranty & Reliability
ACiQ provides 10-year coverage when registered online, protecting against compressor and furnace failure during the critical ownership window. This registration-based structure means buyers must document purchase within specified timeframes. Coverage typically excludes wear items, refrigerant, and service labor, so maintenance records matter for claim validation.
Specifications
| SKU | ACIQ-48-EHPD-UPG |
| Brand/Manufacturer | ACiQ |
| Cooling BTU | 46,000 |
| Heating BTU | 100,000 |
| Refrigerant | R454B |
| Electrical | 120 V. 1 Phase 60 Hz |
| Warranty | 10 Years with Online Registration |
| Decibel Level (dBA) | 74 |
| Weight (in lbs) | 120.000000 |
| Feature | Spec |
| Replaces | GSZ140491 |
| Product Features | Rebate Available |
| 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 | 40 amps |
| Min. Breaker Size | 26.4 amps |
| Tonnage | 5 Ton |
| Valve Type | Sweat |
| Height | 34.5" |
| Width | 21" |
| Depth | 28.75" |
| Resources | Goodman Brochure Goodman Installation Manual 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 |
| Liquid Line | 3/8" |
| Suction Line | 1 1/8" |
| Style | A-Coil |
| Exhaust Flue Requirement | Metal |
| Furnace Efficiency / AFUE | 80% |
| Blower Motor | Multi-Speed |
| Maximum CFM | 2000 |
| Burner Stages | Two |
| Fuel Type | Gas |
| Suction Line Insulation Thickness | 1/2" |
| Length | 50 feet |
Frequently Asked Questions
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