ACiQ 3.5 Ton Evaporator Coil | 21" Wide V-Coil w/ TXV | R454B (EVD5X42M21A)
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Key features
- 3.5-ton V-coil sized for residential split systems in the 1,600 to 2,200 sq ft range
- 21-inch wide cabinet for compatibility with standard air handler and furnace platforms
- R-454B refrigerant ready, aligned with current EPA low-GWP transition requirements
- Factory-installed TXV for active refrigerant metering and improved part-load efficiency
- Compatible with upflow and horizontal system configurations
- Sold direct with 12-year parts warranty and no dealer markup
About this system
The ACiQ EVD5X42M21A is a 3.5-ton, 21-inch wide V-coil evaporator coil designed for use with R-454B refrigerant, a lower-global-warming-potential alternative to R-410A that is becoming the new standard as the industry moves away from older refrigerants under updated EPA regulations. The coil ships with an integrated thermostatic expansion valve (TXV), which actively meters refrigerant flow in response to load conditions rather than relying on a fixed-orifice metering device. That means better efficiency matching across a range of operating conditions and a coil that is compatible with variable-capacity and two-stage systems rather than only basic single-stage equipment.
The 21-inch cabinet width and V-coil configuration make this a practical fit for residential forced-air systems where horizontal or upflow installations require a compact footprint without sacrificing surface area. At 3.5 tons, it covers homes roughly in the 1,600 to 2,200 square foot range depending on climate and insulation, and it is intended to be matched with a compatible R-454B condensing unit. Buyers considering this coil are typically replacing an aging coil in an existing system, building out a new split system at a lower upfront cost, or preparing for a refrigerant-transition upgrade before R-410A equipment becomes harder to source. It is a replacement or new-construction component, not a standalone comfort solution, so proper system matching and professional installation are required.
The ACiQ EVD5X42M21A offers a sensible, future-oriented coil choice at a price that undercuts comparable name-brand units, with R-454B compatibility and a factory TXV giving it a genuine technical edge over basic replacements. The trade-offs are real: the brand is newer with limited long-term reliability data, the actual manufacturer is undisclosed, and service after the sale depends entirely on finding a qualified independent contractor who is comfortable working with the equipment. For cost-conscious buyers doing a planned replacement or new installation with a trusted local contractor, it is a solid candidate.
Overall score is the average of the five ratings above.
What we like
- R-454B ready, positioning the system for refrigerant compliance as R-410A is phased down
- Factory TXV included, improving efficiency and compatibility with variable and two-stage condensing units
- 12-year parts warranty ships with the unit and is not subject to dealer markup
- Direct-sale pricing undercuts Carrier, Trane, and Lennox equivalents by a meaningful margin
- Early owner feedback points to quiet operation and responsive customer support from ACiQ
Trade-offs
- Long-term coil reliability is unproven since the brand is relatively new and Consumer Reports does not yet rank it
- The actual manufacturer is not publicly disclosed, making parts cross-referencing and service history harder to verify
- No dealer network means installation and future service depend on independent contractors, who vary widely in familiarity with ACiQ equipment
- R-454B requires technicians certified and equipped for the refrigerant, which not all local HVAC contractors are set up for yet
What homeowners and pros say about ACiQ
Owners of ACiQ equipment in early forums and review threads consistently mention that the units run quietly and that the company’s direct support line is easier to reach than a traditional dealer chain. However, because ACiQ is a newer brand, Consumer Reports has not yet assigned it a reliability score due to insufficient long-term data, and that absence is a real gap for buyers who rely on independent verification. The direct-sale model is widely praised for keeping prices below name-brand equivalents, but the same model means there is no local dealer to call if something goes wrong mid-season. For a coil specifically, that trade-off is somewhat lower stakes than for a compressor-bearing outdoor unit, but it still matters if a coil develops a refrigerant leak and your contractor is unfamiliar with ACiQ’s parts sourcing process.
Among HVAC professionals, the undisclosed manufacturer is the most frequently raised concern. Technicians who suspect an ICP or Carrier supply chain connection say cross-referencing components sometimes works, but it is not guaranteed and ACiQ has not confirmed it. The shift to R-454B also adds a layer of complexity: while the coil itself is straightforwardly built, A2L refrigerant handling requirements mean not every contractor in every market is yet equipped to service it. Contractors who are already R-454B certified tend to view the coil’s factory TXV and competitive pricing favorably, particularly for budget-conscious retrofit jobs where the homeowner needs a refrigerant-transition-ready system without the premium of a Carrier or Lennox label.
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 | EVD5X42M21A | N/A (coil only) | TXV, compatible with single, two-stage, or variable | Value pick |
| Carrier | Performance series CNPVP3617ALA (or comparable 3.5T cased coil) | N/A (coil only) | TXV, single or two-stage compatible | Moderately higher than ACiQ |
| Trane | Vortica II BAVP series 42 (3.5T cased coil) | N/A (coil only) | TXV, single or two-stage compatible | Moderately to significantly higher than ACiQ |
| Lennox | C33 series cased coil (3.5T) | N/A (coil only) | TXV, single, two-stage, or variable compatible | 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
Is the EVD5X42M21A compatible with any R-454B condensing unit, or does it have to be matched with an ACiQ outdoor unit?
The coil is designed for R-454B systems and should be matched with a condensing unit whose capacity and refrigerant rating align with a 3.5-ton R-454B circuit. While ACiQ markets it alongside their own outdoor units, a qualified HVAC technician can match it to another manufacturer's compatible R-454B condenser as long as the system is properly sized and the TXV is set up for the specific refrigerant charge. Always confirm ARI or AHRI matched ratings with your contractor for efficiency credit and warranty purposes.
Can my existing technician who normally works on R-410A equipment install and service this coil?
Not without additional preparation. R-454B is classified as a mildly flammable A2L refrigerant, which requires technicians to complete A2L-specific training and use leak detection and recovery equipment rated for flammable refrigerants. Many experienced R-410A technicians are pursuing this certification now, but you should confirm your contractor is already qualified before scheduling the job.
How does the 12-year warranty work when the coil is sold direct and there is no ACiQ dealer near me?
ACiQ handles warranty claims directly through their support channel rather than through a dealer network, which removes the dealer markup but also means you are responsible for coordinating with an independent contractor for any warranty labor. The 12-year term covers parts; labor costs for warranty repairs are typically the homeowner's responsibility unless a separate labor warranty is purchased or negotiated with the installing contractor.
Will this coil work in a horizontal installation, or is it upflow only?
The EVD5X42M21A V-coil configuration is designed to support both upflow and horizontal installations, which is common for attic or crawlspace applications. Confirm the drain pan orientation and condensate drain routing with your installer before the job, as horizontal setups require attention to proper slope and secondary drain provisions.
What is the risk of buying a coil from a brand whose manufacturer is not publicly identified?
The main practical risk is parts sourcing and service cross-referencing: if a coil develops a leak or a valve fails outside the warranty period, a technician cannot easily look up the OEM parts catalog by manufacturer name. Forum speculation links ACiQ to the ICP and Carrier family of manufacturers, but this is unconfirmed. Sticking with ACiQ's own support line for parts requests is the most straightforward workaround during the ownership period.
Specifications
| Cooling capacity | 3.5 Ton |
| Refrigerant | R-454B |
| Model | EVD5X42M21A |