The MRCOOL® Signature Series 42k Heat Pump Condenser is a powerful, energy-efficient solution designed to keep your home comfortable all year. With performance ratings of 14.3 SEER2 and 11.7 EER2, it delivers reliable heating and cooling while helping reduce overall energy use and utility bills. Whether you’re facing summer heat or winter chill, this system is built to perform.
Pre-charged with R-454B refrigerant, this model supports modern environmental standards with a lower global warming potential than older refrigerants. The pre-charged design also speeds up installation and reduces labor costs, making it a smart choice for contractors and homeowners alike. At its core, a single-speed scroll compressor ensures steady, long-lasting performance. Enhanced with inner-groove copper tubing, the system provides faster, more efficient heat transfer. Built-in temperature and pressure sensors offer real-time system monitoring and protection, while an intelligent defrost function prevents frost buildup for smooth operation in cold conditions. Operating at just 65 decibels, the unit stays quiet enough for residential use, aided by a sound-dampening top. Durability features include a steel louver coil guard, and a wire fan grille, the best for protecting internal components.
The compact design allows flexible installation, and accessible service ports simplify maintenance. Backed by a 10-year limited parts warranty and a limited lifetime compressor guarantee, the MRCOOL® Signature Series 42k Heat Pump Condenser offers lasting comfort and confidence.
| Net Dimensions (In) | 29.14 D x 32.875 H x 29.14 W |
| Net Weight (Lbs) | 202 |
| Works With | Signature Series Multi-Position or Stud Mount Air Handlers |
| SEER2 | 14.3 |
| EER2 | 11.7 |
| HSPF2 | 7.5 |
| Cfm | 2950 |
| Tonnage | 3.5 |
| Cooling Capacity (Btu) | 39000 |
| Heating Capacity (Btu) | 39000 |
| Voltage (V) | 208/230 |
| Phase | 1 |
| Cycle | 60 |
| Max Fuse Breaker (A) | 45 |
| Min Circuit Ampacity (A) | 26 |
| Color | Grey |
| Refrigerant Type | R-454B |
| Refrigerant Volume (Oz) | 119.9 |
| Decibel Rating (Dba) | 65 |
| Inverter | No |
| Min Ambient Cool (F) | 59 |
| Min Ambient Heat (F) | 5 |
| Max Lineset Length (Ft) | 150 |
| Liquid Line Size | 3/8 |
| Suction Line Size | 3/4 |
| Compressor Motor Type | Scroll |
| Condenser Fan Motor Type | PSC |
| Condenser Fan Motor Hp | 1/7 |
| 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) | 30.3 |
| Gross Height (In) | 34.8 |
| Gross Width (In) | 30.3 |
| Gross Weight (Lbs) | 212 |
I ordered a 2 zone unit for the bedrooms in our home. It took a few months to arrive (manufacturer issue, nothing to do with HOD, and we were contacted on more than one occasion with an order update which was much appreciated!), but when it did arrive was very easy to install. Both the heat and AC function work perfectly, and our family is very happy!
I ordered a HVAC system and it arrived in a timely manner and with no apparent issues. I thought the system was defective once installed but it was the installers fault who wired it wrong. My only issue would be the fee (30% I believe) to return a defective item within the 30 day return policy. If it is defective the customer shouldn't have to pay a fee to return an item that is not operating as designed. Other than that this is a good company.
Installed my own central HP system. It was a bit of work but nothing beyond a person with basic mechanical and electrical skills. It took me a while because I had to remove the existing electric forced air furnace from a pretty tight place. Some custom sheet metal work and a bit of custom electrical too. Worked perfectly when powered up and I actually like the thermostat provided, although I wish it was clearer how to set up a temperature set-back schedule. Pre-charged refrigerant piping was something new and I liked that too. The best thing is that my electric utility forked out $4,000 and that paid for the unit!
Installed with ceiling cassettes... Quiet and keeping us cool so far !
Sure! Here’s a **funny, pun-filled review** you could post online about a **Mr. Cool mini split** — you can tweak it depending on whether you want it to sound like a casual customer or a witty product review.
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😎 “Mr. Cool? More Like Mr. Ice-olation Station!”
Check this guy out. Mr. Cool. He doesn’t talk back, he keeps his chill no matter how heated things get, and best of all, he "splits" his time evenly between cooling and heating. Talk about a balanced relationship! Installation was a breeze (literally). I expected drama, sweat, and a few choice but once he moved in, the temperature dropped faster than my motivation to leave the house.
Now my living room is so cool, penguins are sending me roommate requests. My electric bill? It’s giving "light chill, not frostbite."
Whether it’s summer meltdown season or winter’s silent treatment, Mr. Cool always knows how to vent properly. I’ve never had such a fan-tastic relationship before. So yeah, call me biased, but this unit really "blew me away".
