ACiQ 3.5 Ton Evaporator Coil | 21" Wide Multi-Positional V-Coil w/ TXV | R454B (EVM5X42M21A)
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Key features
- 3.5-ton capacity V-coil, 21 inches wide for tighter equipment closets
- R-454B refrigerant compatible, meeting current EPA phase-down requirements
- Factory-installed TXV for active refrigerant metering and improved efficiency
- Multi-positional design supports upflow, downflow, and horizontal installations
- Sold direct with ACiQ's 12-year parts warranty, no dealer markup included
- Designed as part of ACiQ's matched-system lineup for certified efficiency ratings
About this system
The ACiQ EVM5X42M21A is a 3.5-ton, 21-inch-wide multi-positional V-coil designed to work with R-454B refrigerant, the low-global-warming-potential replacement that is quickly becoming the industry standard as R-410A is phased out. If you are building a new system or replacing a coil in preparation for a next-generation refrigerant future, this unit positions you on the right side of that transition. The included thermal expansion valve (TXV) actively modulates refrigerant flow in response to load conditions, which produces more consistent temperatures and better efficiency than a fixed orifice would.
The V-coil configuration and multi-positional design give installers flexibility to mount the coil in upflow, downflow, or horizontal orientations, making it a practical fit for a range of air handler placements. At 3.5 tons, it is sized for homes roughly in the 1,600 to 2,100 square foot range, though actual sizing depends entirely on a proper Manual J load calculation for your climate and construction. This is a coil only, not a system, so it must be matched with a compatible air handler and condensing unit rated for R-454B; confirm ARI-certified matched system combinations before purchase to protect efficiency ratings and warranty coverage.
The EVM5X42M21A is a straightforward, competitively priced R-454B evaporator coil that covers the essentials well: TXV metering, flexible orientation, and a 12-year warranty at a price below most name-brand equivalents. The main reservations are the undisclosed manufacturing origin, which complicates parts sourcing down the road, and the limited long-term field data on ACiQ coils specifically. For a cost-conscious buyer working with a trusted installer who can confirm matched-system certification, it represents a reasonable bet.
Overall score is the average of the five ratings above.
What we like
- R-454B compatibility future-proofs the system against ongoing R-410A phase-out regulations
- Factory TXV included at no upcharge, improving efficiency and temperature control over fixed-orifice alternatives
- Multi-positional V-coil design reduces install constraints across different mechanical room configurations
- 12-year parts warranty ships with the unit without requiring dealer registration markups
- Direct-to-consumer pricing undercuts comparable coils from Carrier, Trane, and Lennox name-brand lines
Trade-offs
- Undisclosed manufacturer makes cross-referencing parts, service bulletins, and long-term reliability data harder than with a named brand
- Consumer Reports has not yet assigned a reliability score due to insufficient long-term data on ACiQ products
- No factory dealer network means warranty labor depends entirely on finding a willing independent contractor
- As a coil-only component, efficiency ratings are only valid within ACiQ-certified matched system combinations, adding a verification step before purchase
What homeowners and pros say about ACiQ
Homeowners who have installed ACiQ equipment generally report positive early experiences, citing quiet operation and responsive customer support as recurring themes in online forums and contractor communities. However, Consumer Reports has not yet assigned ACiQ a reliability score because the brand is too new for the long-term failure data that scoring requires, and that absence is a real caveat worth acknowledging rather than glossing over. For a coil specifically, the documented concerns in the ACiQ ecosystem center on the undisclosed manufacturing origin: without a confirmed parent brand, it is harder for technicians to cross-reference service bulletins, confirm parts interchangeability, or predict long-term failure patterns the way they can with a Carrier or Trane coil whose lineage is known.
HVAC contractors tend to have a split reaction to ACiQ. Those who have worked with the equipment report that it installs without surprises and that ACiQ’s support line is accessible when questions arise. The friction point is the direct-sale model: contractors who rely on distributor relationships for parts, warranty processing, and technical backup sometimes resist servicing equipment that bypasses that chain. If a coil develops a leak or a fitting fails years from now, the repair path runs through independent sourcing rather than a local distributor with stock on the shelf. That is not a dealbreaker for an experienced contractor with good supplier contacts, but it is a real operational difference from specifying a coil from a brand with full regional distribution.
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 | EVM5X42M21A | N/A (coil only) | N/A (coil component) | Value pick |
| Carrier | Performance CNPVP Series | N/A (coil only) | N/A (coil component) | Moderately higher than ACiQ with dealer markup and wider service network |
| Trane | Vortica II BCXF Series | N/A (coil only) | N/A (coil component) | Higher than ACiQ, typically sold through Trane dealer network with associated markup |
| Lennox | C33 Evaporator Coil Series | N/A (coil only) | N/A (coil component) | Premium-tier pricing, sold exclusively through Lennox dealers at higher cost than ACiQ |
Competitor rows are comparable single-stage units at similar efficiency; price is relative position, not a quote.
Questions about this system
Does this coil come with the TXV already installed, or do I need to buy one separately?
The TXV is factory-installed on the EVM5X42M21A, so your installer does not need to source or add one separately. Confirm this with your order documentation before the install appointment to avoid any confusion on-site.
What air handlers and condensing units is this coil certified to match with for R-454B?
ACiQ publishes matched-system combination ratings on their site and through the AHRI directory. You should verify that your specific air handler and outdoor unit combination appears as an AHRI-certified match before purchase, because mismatched combinations void efficiency ratings and may affect warranty coverage.
Will a standard HVAC contractor work on an ACiQ coil, or does it require a factory technician?
Any EPA 608-certified HVAC technician can legally service R-454B equipment, and ACiQ sells direct rather than through a dealer network, so there are no factory-exclusive service requirements. The practical issue is that some contractors are unfamiliar with or reluctant to service direct-sale brands, so it is worth confirming your chosen contractor is comfortable with ACiQ before you buy.
How does the 12-year warranty work when ACiQ sells direct and there is no local dealer?
ACiQ's 12-year parts warranty covers replacement components, but labor costs are your responsibility and must be arranged through an independent contractor. There is no dealer network to call, which means warranty claims are handled directly through ACiQ and the replacement parts are shipped to you or your contractor. Keep all purchase and installation documentation.
Is R-454B safe to handle, and do I need any special tools compared to R-410A?
R-454B is mildly flammable (A2L classification), which means technicians need to follow updated safety protocols including the use of A2L-rated recovery equipment and leak detection practices. Most R-410A service tools are not rated for A2L refrigerants, so your contractor should confirm their equipment is compatible before beginning work.
Specifications
| Cooling capacity | 3.5 Ton |
| Refrigerant | R-454B |
| Model | EVM5X42M21A |