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Question: What is the minimum outside temperature in which the heat pump will still work?  Many I've seen only go down to 45 degrees.  Thanks!
Document: I used to own a single hose portable AC that was nowhere near as efficient as this model. This is technically a heat pump. It appears to have a reversing valve. Both heat and cool work great. This unit still produces a fair amount of heat at low temps of approx. 20 degrees. One gripe I have is the blower cycles on if by chance the units thermostat reaches 81 degrees.
Not only will it not heat beyond 77 degrees -- it silently deactivates the temperature adjustments once the temperature has reached 77 degrees. Combined with what's either a badly calibrated thermostat, or a design that subjects the thermostat to the local heat in the unit, we've run it up to 77 just to get to 70 in the room.Incidentally, I've got to praise Amazon's second line customer support. I ran into the problem about 35 days after purchase.
I'm giving this 4 stars because I'm not impressed with the amount of heat it produces when in that mode. That said, the air conditioning part is the BEST! Once you figure out its thermostat is about 5 degrees above the real temperature in the room, it cools my 20' x 20' bedroom in less than 5 minutes. Waiting for the next electric bill, but I don't think this uses that many kilowatts. Actually, I really don't care - being cool in this add-on room is worth any price.
This is a product I'd love to like. I'm using it as a heat pump in mild Northern California weather, replacing electric baseboard heating. It puts out a good amount of heat and will probably be far more efficient than the baseboards. The second unit I received seems to be off by a few degrees on its thermostat, but I can live with that.
I can then cool the room. Pulling in damp air makes it miserable.The hose used to drain the unit is so great. HUUUGE fan of this. This saves me so much hassle.All in all i probably will have to buy a separate dehumidifier - just because of the hassle it causes me.This unit can cool a room quite quickly (15 degrees in about 1-2 hours). I will update this winter once I can see the heat pump in action.
It does surge when the compressor cycles on. It has thrown a 20 amp breaker a few times when I had other appliances running on the same circuit.It is also noisier than I had hoped. In AC mode with the fan on high it can be distracting when I am trying to work. It is better when the fan is on the lowest setting, but still quite loud. I could not hear my wife calling me from another room just now because the heater is on.
I purchased this because it has the ability to heat and cool and dehumidify using a heat pump. I plan to use it as a very powerful dehumidifier that I can use to occasionally heat / cool my basement.
Overall, I'm disappointed by this air conditioner. I think like most air conditioners the maximum room size is very unrealistic. The unit maximum is supposed to be 700 sq. ft. I placed it in a 500 sq. ft. room when it was about 95 F outside. After an hour it lowered the room temperature from 90 to 89. Of course, I have an old house with poor insulation, single pane windows and the room had a southern exposure.
I bought a portable air conditioning unit at Home Depot about 5 years ago. I probably didn't pay much. Maybe $300? It was never very effective, only managing to bring the temperature down a few degrees, even after a couple hours in a small, closed room. The Friedrich unit is so much better. First off, the compressor is significantly quieter. It's far from silent, don't get me wrong, and there's definitely a lot of fan noise. But it's tolerable.
All parts feel solid and high quality.So far it is doing a nice job of keeping my entire 800 sq ft condo at around 77 degrees despite Houston, TX heat and humidity. I will update when I test out its heating capability.
Answer: The manual says that it can operate down to 14 degrees - I don't have any personal experience though since I am in research process...