In perusing the many facets of any product on today's market, the consumer will surely be faced with knowing and

understanding the many rating issues that denote how it is rated. Seasonal Energy Efficiency Ratio (SEER) will be listed as a

number to tell the buyer how efficiently this air source heat pump will operate over an entire season. The consumer will

expect that the higher the number, the less money that will be drawn from the energy budget. Additionally, Energy Efficiency

Ratio (EER) is another rating which falls into the higher outside temperature category of close to 100 degrees. Again, the

higher the rating number, the more efficient the operating costs will be. While the previous two rating systems are focused

on the cooling aspects, the Heat Seasonal Performance Factor (HSPF) deals solely with the efficiency as it pertains to

heating function. The higher number will tell the story.

Of the many products available, there are a few that seem to stand out in the crowd. Trane is one of the top manufacturers of

the air sourceheat pump and carries the Energy Star rating for energy efficiency. With some of their products having a 19

SEER rating, the claims are for a savings of as much as 50% for energy costs. Lennox is another of the leaders in this field

of heating and cooling technology. The ozone-free facet offers another perk for the occupants of the residence or office

space to be protected from harmful environmental irritants which enjoying heating and cooling comforts.

Key words:Air Source Heat Pump ，Heat Pump

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