ACiQ 3 Ton Evaporator Coil | 21" Wide Multi-Positional A-Coil w/ TXV | R454B (EAM5X36M21A)
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Key features
- 3-ton capacity, 21-inch wide cabinet for tighter mechanical spaces
- Multi-positional: upflow, downflow, or horizontal installation
- Factory-installed TXV for precise refrigerant metering and consistent efficiency
- R-454B refrigerant compatible, meeting current EPA low-GWP requirements
- Ships with a 12-year parts warranty, no dealer markup required
- Sold direct by AC Direct, cutting out distributor and dealer channel costs
About this system
The ACiQ EAM5X36M21A is a 3-ton multi-positional A-coil designed to work as the indoor half of a split-system air conditioner or heat pump. At 21 inches wide, it fits into tighter mechanical closets and air-handler cabinets than standard 24-inch coils, making it a practical choice for replacement jobs or new installs where cabinet width is a constraint. The coil is factory-equipped with a thermostatic expansion valve (TXV), which meters refrigerant flow more precisely than a fixed orifice and helps the system maintain rated efficiency across a wider range of outdoor temperatures and load conditions.
This coil is charged for R-454B, a lower-global-warming-potential refrigerant that is increasingly required under EPA regulations phasing out R-410A. If you are pairing it with a new outdoor unit, that unit must also be R-454B compatible. Retrofitting it onto an existing R-410A system is not permitted, so confirm refrigerant compatibility before purchasing. Multi-positional means the coil can be installed in upflow, downflow, or horizontal configurations, which gives installers flexibility when air-handler orientation is dictated by the space rather than preference. This model is well suited for homeowners doing a full system replacement who want to stay ahead of refrigerant regulations without paying name-brand prices.
The ACiQ EAM5X36M21A offers a straightforward, TXV-equipped A-coil at a price point that undercuts most name-brand counterparts by a meaningful margin. The 21-inch width and multi-positional design add real installation flexibility, and the 12-year parts warranty is competitive. The trade-offs are the brand's limited long-term track record and the added complexity that comes with an undisclosed manufacturer and direct-sales service model.
Overall score is the average of the five ratings above.
What we like
- Priced well below comparable coils from Carrier, Trane, and Lennox
- TXV included from the factory, not an upcharge or field add-on
- 21-inch cabinet fits spaces where standard 24-inch coils will not
- R-454B ready, so the system is compliant with current and near-term refrigerant regulations
- 12-year parts warranty without requiring dealer registration or markup
Trade-offs
- Manufacturer is not publicly disclosed, making parts cross-referencing and service history harder to verify
- No independent long-term reliability data; Consumer Reports has not yet ranked the brand
- Sold direct, so service depends entirely on finding an independent contractor willing to work on a non-dealer brand
- R-454B limits compatibility to newer outdoor units only, ruling out any pairing with existing R-410A equipment
What homeowners and pros say about ACiQ
Homeowners who have installed ACiQ equipment broadly report quiet operation and no early reliability issues, though it is worth noting that the brand is relatively new and Consumer Reports has not yet accumulated enough long-term data to assign a reliability score. Early owner sentiment on forums and direct reviews skews positive, with responsive customer support cited as a consistent bright spot. That said, the documented structural concerns with the brand apply here too: the undisclosed manufacturer makes it genuinely harder for a technician to cross-reference coil specifications, source parts from secondary suppliers, or trace service history the way they can with a Carrier or Trane product. That ambiguity is a real trade-off, not a hypothetical one.
Among HVAC contractors, the reception to direct-sale brands like ACiQ is mixed. Technicians who are comfortable with the model appreciate the price advantage it passes to customers, and early field reports do not flag coil-specific failure patterns at unusual rates. However, contractors who rely on manufacturer distributor relationships for parts, technical support, and warranty labor reimbursement tend to steer customers toward brands with established dealer networks. The lack of a dealer channel means that if something does go wrong with this coil inside the warranty period, the homeowner coordinates the claim directly and pays labor out of pocket. For buyers who have a trusted independent contractor and are primarily focused on upfront cost, the ACiQ coil represents a credible option. For buyers who want the backstop of a local dealer service network, the name-brand alternatives carry less uncertainty.
Sources: Consumer Reports heat pump ratings, HVACDirect on the ACiQ brand, AHRI Directory of Certified Product Performance, U.S. DOE appliance and equipment efficiency standards.
How it compares
| Brand | Comparable model | SEER2 | Stage | Price position |
|---|---|---|---|---|
| ACiQ | EAM5X36M21A | N/A (coil only) | N/A (coil only, TXV included) | Value pick |
| Carrier | Performance Series CAPF3636B6 | N/A (coil only) | N/A (coil only, TXV included) | Moderately higher than ACiQ |
| Trane | Spine Fin 4TXCB003DS3HCA | N/A (coil only) | N/A (coil only, TXV included) | Moderately to significantly higher than ACiQ |
| Lennox | Merit Series CH35-36B | N/A (coil only) | N/A (coil only, TXV included) | Moderately higher than ACiQ |
Competitor rows are comparable single-stage units at similar efficiency; price is relative position, not a quote.
Questions about this system
Can I pair this coil with my existing R-410A outdoor unit?
No. The EAM5X36M21A is designed and rated for R-454B only. Connecting it to an R-410A system is not permitted under EPA regulations and would void any warranty. You need an R-454B compatible outdoor unit to complete the system.
Does the TXV come installed, or do I need to add it separately?
The TXV is factory-installed on this coil. Your installer does not need to source or add one in the field, which saves time and removes one potential installation variable.
What does multi-positional actually mean for my installation?
It means the coil can be oriented for upflow, downflow, or horizontal airflow without purchasing a different model for each application. Your HVAC contractor will configure it to match the direction your air handler moves air.
How does the 12-year warranty work when there is no local dealer?
ACiQ sells direct through AC Direct, so warranty claims go through them rather than a local dealer. Parts coverage lasts 12 years, but labor is not included, meaning you will need to pay an independent contractor to perform any warranty repairs. Confirm the claim process with ACiQ before purchase.
The manufacturer is not disclosed. Will I have trouble finding replacement parts or a technician willing to service this coil?
Parts availability has not been widely reported as a problem by early owners, but because the OEM is unconfirmed, a technician cannot easily cross-reference the coil against a known manufacturer's parts catalog the way they can with a Carrier or Trane product. Some independent contractors may be hesitant to service a direct-sale brand, so it is worth confirming your installer's comfort level before committing.
Specifications
| Cooling capacity | 3 Ton |
| Refrigerant | R-454B |
| Model | EAM5X36M21A |