How on earth can you get heat out of very cold outside air? How can a heat pump make heat out of cold air?
By the state change of some very fascinating gases the magic happens.
A heat pump can do some very superb things in relation to making heat. To grasp the way it works you will need to first perceive what occurs when sure gases change from a liquid to a gas and back to a liquid again. To simplify it a bit we are able to look at a fundamental air-con system. The refrigerant in an air con system is modified to a liquid within the out of doors condenser. The compressor compresses the gas forming a sizzling gas. As this gas cools below high pressure it adjustments right into a liquid form. Inside the indoor unit the liquid is pushed by way of a small hole or orifice. When it comes out the opposite side it quickly adjustments to a gas because the pressure immediately drops. The speedy pressure drop modifications the refrigerant to a very cool gas. Air flowing over the cool gas inside the pipes makes the air cool and provides air conditioning.
Now for a heat pump the process is much the same. The coils are just switched by used a reversing valve in the outside condenser unit. Instead of the heat being discharged to the outside from the condenser unit, the indoor unit becomes the condenser coil. The out of doors coil now turns into the cold coil and cools the outside. That is why if it is too cold outside the unit should run in air-con mode for a short time to defrost the outside cold coil. Throughout this time the system will normally have electrical heat inside to run and hold the indoor air warm.
Now you know that a heat pump is really no more than an air conditioner running in reverse. Via the magic of using refrigerants a heat pump can run many occasions more efficiently than straight electrical heat.
A careful heat loss/gain ought to at all times be performed by a certified individual before any sizing of a unit. Too massive or too small of a heat pump system can cause it to be inefficient and probably cause it to be very uncomfortable. The longevity of the unit will also be affected by sizing and installation. Be patient and look diligently for the most effective contractor to put in your system.
A properly designed and put in system can provide a few years of comfort and efficiency. If you happen to look for and find the fitting contractor to do the job right you will get many bother free comfortable years from your heat pump unit.
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