• Cost: You pay more for a heat pump, with the initial cost ranging from $600 to $1,500. However, the device will pay for itself over within two to three years, since it doesn’t consume a lot of electricity.

• Match the unit to your room size: If a mini-split heat pump is too large for the room, it will waste energy instead of conserving it, and won’t regulate temperature properly either. If the heat pump is too small, it will have to run extra amounts of time to properly heat and cool the room. Some provide the following guidelines when choosing a heat pump:

  • Room size from 250 sq. ft. - 450 sq. ft.: 9,000 BTUs

  • Room size from 550 sq. ft. - 800 sq. ft.: 12,000 BTUs

  • Room size from 750 sq. ft. - 1100 sq. ft.: 15,000 BTUs

  • Room size from 850 sq. ft. - 1250 sq. ft.: 18,000 BTUs

• Control humidity as well: Since the water vapor content in the room is closely related to the temperature, if it doesn’t regulate temperature properly, it won’t regulate the humidity either. Another point is that there will probably be some condensate during the winter, due to the outdoor unit getting too cold. There should be some way of letting this condensate out of the device in a controlled manner.

• Installation vs. DIY models: Some companies, such as Mr. Cool, make mini-split heat pumps that you can install yourself, to save on installation. The hole for the tubing that connects the indoor and outdoor units can be as small as 3” in diameter, which is not difficult to perform by yourself. Such a unit will efficiently cool or heat a space that is between 300- 525 square feet. You just have to mount the indoor and outdoor units--the refrigerant is already supplied in the device.

• Safer from intruders: One disadvantage of an air conditioning unit that you put in a window is that an intruder can easily push the unit in and gain access to your house. Using a mini-split heat pump will serve the same purpose, without the risk of intrusion.

• Noise: You don’t want your heat pump to be obnoxiously noisy. The best models will have most of the moving parts in the outdoor unit, so as to keep the noise out of your house. The Senville 24000 BTU Mini-Split Air Conditioner Heat Pump is made for quiet operation, so it’s perfect even for your bedroom!

• Specifications on heat pumps: There are a number of important specs that tell you the efficiency of your heat pump:

  • The Coefficient of Performance (= COP): This is a measure of the ratio of how much heating (or cooling) the device provides, divided by the work required. The higher the COP, the more efficient and economical the pump--you can find some with a COP between 3.1-4.1.

  • SEER: SEER ( = Seasonal Energy Efficiency Ratio) tells you how well the heat pump cools. The minimum SEER is 13, so you want your unit to have a higher rating than that, especially if you live in a hot climate.

  • HSPF:  HSPF (= Heating Season Performance Factor) tells you how well the pump heats your house. The minimum HSPF rating is 7.7, and the maximum is 12.5. You want the HSPF to be as high as possible.

Goodman was founded in 1975 by Harold V. Goodman of San Antonio, Texas. They are presently a subsidiary of Daikin Group, which is based in Osaka, Japan.  Originally, Goodman manufactured flexible air ducts, but then when into HVAC (= Heating, Ventilation, and Air Conditioning) solutions and gas heat products. They presently make air conditioners, heat pumps, and gas furnaces. Their heat pumps have louvered coil guards that protect the condenser coils, as well as filter dryers to remove any contaminants or excess moisture.

Senville is a maker of mini-split and multi-zone heat pumps, as well as air conditioners and water heaters. Their headquarters is located in Montreal, Quebec.

Pioneer, located in Doral, Florida, is a manufacturer of ductless mini-split heat pumps, in a variety of geometries: wall-mounted, ceiling cassette, floor-ceiling mounted, and floor mounted. They also make ducted heat pumps that are ceiling-concealed or central split design.

Fujitsu, founded in 1936 and with their headquarters in Kawasaki, Japan, is a manufacturer of single- and multi-room mini-split heat pumps, as well as air conditioners and gas furnaces.

MrCool is a maker of heat pumps, gas furnaces, and air conditioning systems. Some of their units support WiFi technology as well--you can operate them with your smartphone or tablet.