ACiQ 4 Ton Evaporator Coil | 21" Wide Multi-Positional V-Coil w/ TXV | R454B (EVM5X48M21A)
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Key features
- 4-ton capacity with R-454B refrigerant compatibility for post-2025 compliant systems
- 21-inch wide cabinet fits standard air handler openings
- Multi-positional V-coil design supports upflow, downflow, and horizontal installation
- Factory-installed TXV for precise refrigerant metering and compressor protection
- Ships direct from ACiQ with a 12-year parts warranty, no dealer markup
- Designed as a matched-system component; requires compatible R-454B air handler and condenser
About this system
The ACiQ EVM5X48M21A is a 4-ton, multi-positional V-coil evaporator coil designed for use with R-454B refrigerant, a lower global-warming-potential alternative to R-410A that is now required in new residential equipment manufactured after January 1, 2025. At 21 inches wide, it fits into a range of air handler cabinets and can be oriented for upflow, downflow, or horizontal applications, which gives installing contractors some flexibility when working in tight mechanical rooms or unconditioned attics. The factory-installed TXV (thermostatic expansion valve) meters refrigerant flow precisely, improving efficiency and helping protect the compressor from liquid slugging compared to a fixed-orifice piston metering device.
This coil is a replacement or new-construction component, not a standalone system. It must be matched with a compatible R-454B air handler or furnace and a condensing unit that is also rated for R-454B. Buyers upgrading from R-410A equipment should confirm full system compatibility before purchasing, since R-454B operates at different pressures and requires different handling procedures and certified technicians. The 4-ton capacity suits homes roughly in the 2,000 to 2,400 square foot range under typical conditions, though an accurate Manual J load calculation is the only reliable way to size a coil for a specific structure.
The EVM5X48M21A is a competitively priced R-454B evaporator coil that checks the right technical boxes, including a TXV and multi-positional flexibility, at a lower out-of-pocket cost than most name-brand equivalents. The 12-year parts warranty is strong for a value-tier component, but the undisclosed manufacturer and limited long-term field data mean buyers are accepting some uncertainty in exchange for the lower price. For cost-conscious homeowners working with a reputable independent contractor who can verify system matching, it represents a reasonable choice.
Overall score is the average of the five ratings above.
What we like
- R-454B ready, keeping the system compliant with post-2025 refrigerant regulations
- Factory TXV included, a feature sometimes sold as an add-on by competitors
- Multi-positional design reduces the chance of needing a position-specific coil on a future swap
- 12-year parts warranty is longer than many name-brand coils at similar price points
- Direct-ship pricing undercuts dealer-channel alternatives on upfront cost
Trade-offs
- Actual manufacturer is undisclosed, making it harder to cross-reference OEM parts or service bulletins
- No independent long-term reliability data exists yet; Consumer Reports does not rank ACiQ
- Service depends entirely on independent contractors since there is no ACiQ dealer network for warranty support coordination
- R-454B handling requires A2L-certified technicians and specific equipment, which can limit the pool of installers willing to work on the system
What homeowners and pros say about ACiQ
Homeowners who have purchased ACiQ equipment directly report that the buying experience is straightforward and that responsive customer support stands out compared to navigating a traditional dealer channel. Early owner reviews across forums and direct-purchase review platforms are largely positive, with quiet operation and solid out-of-box performance cited most often. That said, Consumer Reports does not yet rank ACiQ due to insufficient long-term field data, which is an honest signal that the brand is still building its reliability track record. Buyers should weigh those early positives against the fact that independent, multi-year performance data simply does not yet exist for this product line.
Independent HVAC technicians who have worked on ACiQ equipment note a specific practical concern: because the manufacturer is not publicly disclosed, cross-referencing parts, service bulletins, or failure patterns against a known OEM is not straightforward. If a coil develops a refrigerant leak or a TXV fails out of the early warranty window, the contractor is dependent on ACiQ’s own parts supply chain rather than the broad regional distributor networks that support Carrier or Trane equipment. For the EVM5X48M21A specifically, the R-454B refrigerant adds another layer of consideration, since A2L handling requirements mean not every contractor in a given market will be equipped to service it, potentially narrowing warranty service options in less densely populated areas.
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 | EVM5X48M21A | N/A (coil only) | N/A (coil only) | Value pick |
| Carrier | Puron Advance (PA) Series Evaporator Coil CNPHP4821ALA | N/A (coil only) | N/A (coil only) | Noticeably higher through authorized dealer |
| Trane | 4TXCC008DS3HCA Uncased Coil (4-ton) | N/A (coil only) | N/A (coil only) | Moderately higher through Trane dealer network |
| Lennox | CH35 Series Evaporator Coil (4-ton) | N/A (coil only) | N/A (coil only) | Moderately to noticeably higher through Lennox dealer |
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 condensing unit?
No. R-454B and R-410A operate at different pressures and are not interchangeable. The entire system, including the coil, air handler, and condensing unit, must be rated for R-454B. Mixing refrigerant types or connecting mismatched equipment will void the warranty and can damage the compressor.
Does the 12-year warranty require professional installation or registration?
ACiQ's 12-year parts warranty typically requires installation by a licensed HVAC technician and product registration within a set period after installation. Review the warranty certificate that ships with the unit for exact registration deadlines and conditions, since failing to register is one of the most common reasons warranty claims are denied.
What does multi-positional mean, and does it affect how the coil is installed?
Multi-positional means the coil can be configured for upflow, downflow, or horizontal airflow orientation. In practice, the installer will position the coil and its drain pan correctly for the chosen orientation before connecting it to the air handler, and the condensate drain must be routed appropriately for each position.
Why does this coil cost less than a Carrier or Trane coil of the same size?
ACiQ sells direct without a dealer network, eliminating the distributor and dealer markup that is built into name-brand pricing. The actual manufacturer has not been publicly disclosed by ACiQ or its parent company AC Direct, so it is not possible to confirm whether the underlying components are identical to a more expensive brand.
If I need a replacement part down the road, will I be able to find it?
Because the manufacturer is not publicly identified, sourcing OEM parts requires going through ACiQ directly rather than through a regional distributor network the way you would with Carrier or Trane. That is worth factoring in if you are in a remote area or if ACiQ's business situation were ever to change, since parts availability through third parties would be uncertain.
Specifications
| Cooling capacity | 4 Ton |
| Refrigerant | R-454B |
| Model | EVM5X48M21A |