A week ago, the North East experienced heavy snow storm and dangerously cold temperature of around 10ºF; It even dropped to 0ºF with wind chills at my place. That was a good chance for me to test the capability of the MrCool heat pump that I installed earlier. I installed a 3-ton 4-zone MrCool heat pump system for my house with 4 air-handlers placed in 4 different rooms, all is connected to an outdoor unit that extracts heat from the outside. Let’s check out the performance in each room.
The living room is the toughest one because it is the largest room and opens to other spaces. I set the temperature at 76ºF, the air-handler keeps blowing out warm air but the room temperature could reach just around 56ºF. This is pretty low but totally in my expectation because the room is not well insulated with drafty windows and door. To make the room warmer, I often have to use another space heater as a supplement heating source.
Move on to the next room which is smaller and has less windows. I set the temperature at 74ºF and now my thermostat shows over 56ºF. Then in my bedroom which is insulated way better, the room temperature reaches 61ºF when I set the air-handler at 62ºF. The room actually becomes really hot and I can’t set the heat pump at a lower temperature because 62ºF is the minimum in heating mode. In another bedroom, I also set it at 62ºF and the room temperature is around 59ºF.
Overall, I am really satisfied with performance of the MrCool heatpump, especially in my 2 bedrooms. This was tested on the coldest days in the winter and the efficiency might decrease during this period. However, the heatpump doesn’t seem to struggle as it gets to the Defrost mode just once every 1-2 hours. You can watch my another video to understand the Defrost mode and should you worry about it.
I will change my old windows and doors in the Spring and I believe the warm air won’t be leaked out as it is right now. Then I believe even my large living room can get cozy and toasty even without additional heating sources. And most importantly, I can save significantly on my energy bills.
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