ACiQ 4 Ton Evaporator Coil | 21" Wide V-Coil w/ TXV | R454B (EVD5X48M21A)
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Key features
- 4-ton capacity in a 21-inch wide cabinet for mid-size residential ducted systems
- R-454B refrigerant compatible, meeting current EPA low-GWP transition requirements
- Factory-installed TXV for precise refrigerant metering and improved part-load efficiency
- Multi-position design supports upflow, downflow, and horizontal installations
- V-coil geometry maximizes heat-transfer surface area within the 21-inch footprint
- Ships as a coil-only component requiring a matched air handler and R-454B outdoor unit
About this system
The ACiQ EVD5X48M21A is a 4-ton, 21-inch wide V-coil evaporator designed for multi-position installations in residential and light-commercial ducted split systems. It ships pre-charged for R-454B, the low-GWP refrigerant that is replacing R-410A across new equipment lines, so pairing it with an R-454B-compatible outdoor unit is a hard requirement rather than a recommendation. The built-in thermal expansion valve (TXV) meters refrigerant flow precisely in response to load changes, which improves efficiency across a wider range of operating conditions compared to a fixed-orifice piston and makes it compatible with both single-stage and variable-capacity condensing units.
At 4 tons and 21 inches wide, this coil fits a mid-size residential footprint and is aimed at homes in the 1,800 to 2,400 square foot range, depending on climate and load. Multi-position flexibility means it can be installed in upflow, downflow, or horizontal configurations, which gives installers and homeowners flexibility when working around existing ductwork and mechanical room constraints. The V-coil geometry increases surface area without requiring a wider cabinet, which helps with airflow and heat transfer in tight air-handler bays. This product is the coil only and must be matched with a compatible air handler or furnace blower section and a condensing unit rated for R-454B.
The ACiQ EVD5X48M21A is a straightforward, competitively priced evaporator coil that covers the R-454B transition requirement and includes a TXV without the premium attached to name-brand coils. The trade-off is that ACiQ is a newer brand with limited long-term field data, and the undisclosed manufacturing origin makes parts cross-referencing less straightforward if a repair is ever needed.
Overall score is the average of the five ratings above.
What we like
- Lower purchase price than comparable coils from Carrier, Trane, or Lennox
- TXV included from the factory, improving efficiency and compatibility with variable-capacity systems
- R-454B ready, so the system is positioned for the current refrigerant transition rather than needing a future retrofit
- Multi-position flexibility reduces installation constraints in diverse equipment room layouts
- 12-year warranty coverage that does not depend on dealer markup or registration through a contractor network
Trade-offs
- ACiQ is a relatively new brand, and Consumer Reports has not yet assigned it a reliability score due to insufficient long-term data
- The manufacturing source is not disclosed, which complicates parts sourcing and cross-referencing service history if the original documentation is unavailable
- Sold direct rather than through a dealer network, so service and warranty work depend on finding an independent contractor willing to work with the brand
- Coil-only product with no bundled air handler, meaning total system cost and compatibility responsibility fall entirely on the buyer and installer
What homeowners and pros say about ACiQ
Homeowners who have installed ACiQ equipment broadly report quieter-than-expected operation and responsive customer support when questions arise, and those same themes show up for the brand’s coil and air-handler components. Because ACiQ is a relatively new market entrant, Consumer Reports has not yet accumulated enough long-term data to assign a reliability score, which means early owner feedback is essentially the only independent signal available right now. For a coil-only product like this, the most relevant concerns raised in contractor forums center on the undisclosed manufacturing origin: technicians note that not knowing the parent factory makes it harder to cross-reference coil construction details or source drop-in replacement parts if something fails outside of warranty, and that ambiguity is a real practical issue rather than a theoretical one.
Documented failure modes that matter for an evaporator coil in this category include coil leaks at the connections or along the fin-and-tube assembly, which can develop over years of thermal cycling and are not unique to ACiQ but are harder to diagnose quickly without clear parts documentation. The direct-sale model also means warranty claims and service calls depend on locating an independent contractor willing to work on the brand, since there is no factory dealer network to fall back on. Contractors who have installed ACiQ products generally describe the fit and finish as consistent with what the price suggests, noting it occupies a middle ground between the cheapest imported coils and the established name-brand options, without yet having the field history to confirm where long-term durability lands.
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 | EVD5X48M21A | N/A (coil only) | TXV, multi-position coil | Value pick |
| Carrier | Performance CNPVP Series (CNPVP4821ALA) | N/A (coil only) | TXV, multi-position coil | Moderately higher than ACiQ |
| Trane | 4TXCC Series 4-ton coil | N/A (coil only) | TXV, multi-position coil | Moderately to significantly higher than ACiQ |
| Lennox | C33 Series 4-ton coil | N/A (coil only) | TXV, multi-position coil | Significantly higher than ACiQ |
Competitor rows are comparable single-stage units at similar efficiency; price is relative position, not a quote.
Questions about this system
What outdoor units is the EVD5X48M21A compatible with, and does it have to be an ACiQ condenser?
No, but the condensing unit must be rated for R-454B refrigerant and sized for 4-ton capacity. R-454B is not interchangeable with R-410A equipment, so you cannot pair this coil with an older R-410A condenser. Verify the manufacturer's match-up guide or AHRI certificate for the specific combination you plan to use.
Is R-454B refrigerant safe and where do I get it serviced?
R-454B is mildly flammable (A2L classification) and requires technicians certified to handle A2L refrigerants, which is now a standard EPA requirement. Any licensed HVAC contractor who has updated their certification for the new refrigerant classes can service the system, though you should confirm that ahead of time since not every technician has completed that training yet.
How do I register the 12-year warranty, and does it require a licensed installer?
ACiQ's warranty terms require registration through their website and typically require professional installation by a licensed HVAC contractor. You should review the warranty card that ships with the unit and complete registration promptly, because coverage periods and conditions can differ if the system is self-installed or registration is delayed.
Can this coil work in a horizontal configuration, and are there any drain pan orientation requirements?
Yes, multi-position V-coils like this one are designed to handle horizontal installation, but the drain pan and condensate connections must be correctly oriented and sealed for the specific position. Your installer should verify the drain pan configuration and test for leaks before closing up the air handler cabinet.
Since ACiQ does not disclose its manufacturer, how do I find replacement parts if something fails out of warranty?
This is a genuine concern with the brand. The most practical approach is to source parts directly through ACiQ's support channel, which has been described as responsive by early owners, or to work with an HVAC parts distributor who can identify components by cross-referencing the model and part numbers on the unit itself. Forum speculation about the parent manufacturer exists but is unconfirmed, so relying on that to source parts carries risk.
Specifications
| Cooling capacity | 4 Ton |
| Configuration | multi-position |
| Refrigerant | R-454B |
| Model | EVD5X48M21A |