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Heat Pump FAQs

Lennox Heat Pump FAQs

Q: What are the differences in the Lennox models of heat pumps?

A: Type of freon, single or 2 stage compressor, hail guards, self diagnostics, self protection against high or low freon pressure, sound levels and compressor heaters.

Q: What is Silent Comfort Technology?

A: It is a patent pending fan design (in cooperation with an insulated compressor) that greatly limits noise production.

Q: I currently have a heat pump with R22 freon that needs to be replaced. Does Lennox offer R22 equipment? Should I consider switching to R410A equipment?

A: Yes, you may still find some R22 equipment available, but the industry is switching to R410A freon.


Q: What does the HSPF, SEER and EER ratings mean?

A: The most important is the HSPF (heating season performance factor). This refers to the seasonal efficiency during the heating season, which is when the economics of a heat pump have the most benefits. The SEER (seasonal energy efficiency rating) refers to the efficiency during the cooling season. The EER (energy efficiency rating) is the efficiency at a given set of values, not considering the season. This is given because not all areas of the country have the same seasons.


Q. Does Lennox offer a solar powered heat pump?

A. Lennox is offering a solar powered heat pump system starting 2010.




General Heat Pump FAQs

Q: I've been told that heat pumps are better than air conditioners. Is this true? Why?
A: Although heat pumps can serve as an air conditioner, the cost savings come when utilizing it for heat. This is due to the heat pump's ability to transfer heat from outside the home to the inside. Because of this, a heat pump can assist in energy costs.

Q: How is heat transferred inside, since its cold outside?
A: Just as heat is transferred from inside the home to the outside during the air conditioning cycle (due to the change in freon states), so the reverse is true. However, it's important to understand that the heat produced feels 'cool' to some individuals accustomed to a warmer type of heat (fossil fuels). This is in spite of the fact that the desired set temperature is satisfied. Why is this? Because the heat produced is close to 'normal' body temperature (98.6 degrees) and, when coupled with the air circulation, feels like air-conditioning. 

Q: What is lowest temperature that a heat pump will work?
A: Equipment varies and so does the operating range. However, 40 degrees is a general standard where some heat pumps begin to lose efficiency. Most will continue to work down to 17 degrees, with some equipment going below that. When the thermostat (via outdoor temperature sensor) senses the outdoor temperature is too cold for the heat pump to be used as the primary heat source, it automatically switches to a secondary heating source (gas, propane, oil or electric).

Q: I notice the bottom of my heat pump continues to frost over. Is this normal?
A: Yes. A heat pump will frost during its normal operation. However, this frost (or ice) should also melt off when the heat pump goes through a self-initiated defrost cycle. 

Q: My heat pump is raised up off the condenser pad. Is this normal?
A: Yes, this is normal. During the normal defrost cycle, frost and/or ice will melt and flow away from the unit. Without being raised up, the condensate could potentially freeze and start to build up. 

Q: I was told that an outdoor sensor is required for my heat pump. Is this true?
A: Requirements may vary between the manufacturer's recommendations, independent testing agencies (ARI/AHRI), and local/State authorities. However, it is true that an outdoor temperature sensor will enhance the effectiveness of the equipment (see question 3 above).