The MRCOOL® Signature Series 42k Cooling Only Condenser is built to provide reliable, energy-efficient cooling for homeowners who want dependable performance and lower utility bills.
With a 14.3 SEER2 and 11.7 EER2 rating, this system offers consistent comfort while keeping energy consumption in check, making it a great fit for both replacement projects and new installations. Pre-charged with environmentally friendly R-454B refrigerant, this unit complies with modern environmental regulations while maintaining strong cooling capacity and dependable performance. At the heart of the system is a durable scroll compressor, engineered to deliver steady, reliable operation over time with minimal wear. To further enhance performance, the unit is equipped with inner-groove copper tubing, which maximizes surface area and significantly improves thermal conductivity and heat transfer efficiency. Despite its robust output, the system is designed with noise reduction in mind, operating at a low 65 decibels, comparable to the sound of a household dishwasher. A sound-dampening top minimizes operational noise without limiting airflow, making this unit ideal for installation in residential areas where quiet performance is valued. For added durability, it features a steel louver coil guard and wire fan discharge grille, which offer strong protection for critical internal components.
The unit’s compact, lightweight design makes it easy to position in tight spaces, while thoughtful service-friendly features like sweat connection valves and an easy-access gauge port streamline both installation and ongoing maintenance. To top it off, MRCOOL® offers a 10-year limited parts warranty and a limited lifetime compressor warranty, offering dependable protection and lasting value.
| Net Dimensions (In) | 29.14 D x 32.875 H x 29.14 W |
| Net Weight (Lbs) | 185 |
| Works With | Signature Series Multi-Position or Stud Mount Air Handlers |
| SEER2 | 14.3 |
| EER2 | 11.7 |
| CFM | 2950 |
| Tonnage | 3.5 |
| Cooling 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) | 114.6 |
| Decibel Rating (Dba) | 65 |
| Inverter | No |
| Min Ambient Cool (F) | 59 |
| 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) | 195 |
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".
