The MRCOOL® Signature Series 18k Multi-Position Air Handler delivers dependable, year-round climate control with enhanced energy efficiency thanks to its use of R-454B refrigerant, an eco-friendly upgrade that reduces environmental impact without sacrificing performance.
Built for flexibility, this unit supports upflow, downflow, and horizontal configurations, making it an excellent choice for compact installations such as closets, attics, and crawl spaces. Despite its slim profile, this Signature Series Air Handler provides robust heating and cooling when matched with a compatible heat pump or condenser. Its tough galvanized steel cabinet resists wear and corrosion, ensuring long-term durability. Inside, copper “A” coils with high-efficiency aluminum fins maximize heat transfer and moisture removal, while internal thermal insulation minimizes energy waste and condensation, keeping comfort high and utility bills low. Installation is streamlined with its user-friendly design, saving time and reducing labor costs. A built-in air filter rack allows for quick filter replacements, and an optional electric heat kit is available for enhanced performance in colder regions.
Smart home ready, this unit works with most third-party thermostats, giving homeowners the freedom to customize their comfort without relying on proprietary controls. Covered by a 10-year limited parts warranty, the MRCOOL® Signature Series 18k Multi-Position Air Handler combines strength, efficiency, and adaptability delivering powerful, reliable comfort all year long.
| Net Dimensions (In) | 22 D x 45.75 H x 19.625 W |
| Net Weight (Lbs) | 120 |
| Works With | Signature Series Top Discharge Condensers |
| CFM | 749 |
| Tonnage | 1.5 |
| Voltage (V) | 208/230 |
| Phase | 1 |
| Cycle | 60 |
| Max Fuse Breaker (A) | 3 |
| Min Circuit Ampacity (A) | 2.1 |
| Mount Type | Multi-Position |
| Color | Grey |
| Refrigerant Type | R-454B |
| Decibel Rating (Dba) | 53 |
| Air Flow Direction | Multi-Position |
| Drain Connection Size | 3/4 |
| Liquid Line Size | 3/8 |
| Suction Line Size | 3/4 |
| Blower Motor Type | PSC |
| Blower Motor Hp | 1/4 |
| Blower Motor Speeds | 3 |
| Blower Motor Rpm | 830 |
| Filter Type | Replaceable |
| Filter Size | 18 * 21 * 1 |
| Metering Device | Orifice |
| Auxiliary Heater Included | No |
| Auxiliary Heater Available | Yes |
| Auxiliary Heater Sizes | 5kW, 7.5kW |
| UL Listed | Yes |
| CSA Listed | Yes |
| ETL Listed | Yes |
| Energy Star Certified | No |
| AHRI Certified | Yes |
| Base Warranty | 10 Year Parts, Limited Lifetime Compressor Warranty |
| Base Parts Warranty | 10 Year |
| Base Compressor Warranty | Limited Lifetime |
| Contains Electronics | Yes |
| Contains Chemicals | Yes |
| Contains Compressed Gas | Yes |
| Proposition 65 Warning | Yes |
| Gross Depth (In) | 25.6 |
| Gross Height (In) | 47.625 |
| Gross Width (In) | 22.83 |
| Gross Weight (Lbs) | 133 |
