COP – (Coefficient of Performance): This number, which usually ranges between 2 and 5 (the higher the number the better), tells how much heating/cooling energy the mini-split offers for each unit of energy it consumes. Put simply, if a unit has a COP number of 3, that means that it creates three times as much heating/cooling energy as it uses to do this work. This isn’t magic. Heat pumps don’t create heat directly from the electricity they consume. Instead, they move heat around to where it is needed. “Air to Air” heat pumps, the category that mini-spits fall under, efficiently move heat from the air outside your house to inside your house (in heating mode), or from inside to outside your house (cooling mode). They can heat your house even when the air outside is much colder than the air inside. Likewise, they can cool your house even when the air outside is much hotter than inside (just like an air conditioner does).

HSPF – (Heating Seasonal Performance Factor): This number, which usually ranges from about 7 to 14 (again, the higher the better) indicates the expected heating performance of a mini-split unit over an entire season (like winter!). Obviously, your heating bill in October might be much less than your heating bill in January. So this number indicates the expected heating performance of a heat pump in different conditions over time. It is especially indicative of how well the heat pump provides heating, as opposed to the next number, SEER, which indicates how well the heat pump provides cooling.

SEER – (Seasonal Energy Efficiency Ratio): This number, which usually ranges from about 10 to 30 (again, the higher the better), is similar to the HSPF number, but is regarded as the best indicator of the cooling ability of a particular mini-split. In other words, a mini-split with a SEER number of 30 will be much more efficient than a mini-split with a SEER number of 15.

EER – There is also an acronym called “EER” which remains in wide use. It is sometimes used in product literature and is related to COP. The EER = 3.41214 × COP.

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  • Hi Dawn, The installers have finished, and I just called April and gave her my credit card payment. The guys were right on time and did a great job, cleaned up nicely and were a pleasure to work with just like you said! Thanks again for all your help, Gail
    Cindy & John B.

  • Hi Todd! We just had heat pumps installed at our house this week by your company, Central Maine Heat Pumps. I just wanted to share with you how pleased we were with the excellent service that we received right from the start. I found your company by googling heat pumps.

    Cindy & John B., Augusta, ME
  • We were very pleased with the installation and so far are happy with the heat pump. The crew was very friendly and professional. Thank you.

    Anne A.
  • We just got one installed in Winslow. The crew that installed it were very professional and fast! We are very happy! Thank you!

    Trish W., Winslow, ME
  • We love our heat pumps! We have always heated with wood and plan to continue to supplement our heat pumps with wood when it is very cold.

    Jenny and Dan
  • Dawn, Thank you for the ceiling work. I have not inspected it myself yet but my tenant said it looks great. I'll likely have a look this evening myself, but I am confident in the quality. I'll be in touch come springtime.

    Brendan S.
  • Good morning Dawn.

    Awesome job! 

    Kevin W.
  • Thanks April! You've been wonderful to work with! I anticipate that we'll be doing some of the other things Todd recommended, perhaps later this year or next spring. 

    Bruce S.
  • Dawn, I just wanted to shoot you a final follow up email. Thank you to you and all those who helped us get the new heat pump installed quickly and affordably with no hassle. The heat pump worked wonders during that humid stretch last month, my wife loves it!

    Nick C.
  • I am very pleased with the work Central Maine Heat Pumps did for me. Their energy consultant designed a well thought out plan answering all my concerns and questions. The installers were very professional arrived on time and left everything very neat.

    Elizabeth C.
  • Dear Dawn & Todd, Thank you very much for all you have done to help me get the Bridgton property up and running. I truly appreciate you working with my banks requirements on payments. Please reach out if you need a reference.

    Heather F.
  • Thank you so much for the great and friendly service, We are very pleased with the work and our flower gardens never even touched. I would recommend you to all our friends, family and anyone else who asks us. A very pleased and happy customer. Thanks again. We will be return customers.

    Marie D
  • Hello! Just wanted to send along a thank you for the work you did! I appreciate your commitment to excellence and customer satisfaction. We are loving the doors and heat pumps so far and know that in the winter the full effects of the changes will really be felt!

    Carrie H.
  • We wanted to stop paying the high oil bills and contacted Central Maine Heat Pumps for information on how heat pumps work. After getting an estimate and advice on other energy savings from their company we had one installed in our home. We saved $2500 in oil costs the first year.

    Doug & Margo
  • Central Maine Heat Pumps recently installed 78 Fujitsu Heat Pumps in WenBelle Apartments, Bucksport, Maine.

    Lloyd W.