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How Does an Air Source Heat Pump Work?
Posted On: December 2, 2023
An air source heat pump (ASHP) is a type of heating and cooling system that transfers heat between the outside air and your home. It operates on the principle of extracting heat from the outdoor air and transferring it indoors for heating, or extracting heat from indoor air and transferring it outside for cooling. Here's a basic explanation of how an air source heat pump works:
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Absorption of Heat:
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Heating Mode: In the heating mode, the heat pump absorbs heat from the outdoor air. Even in cold weather, there is still heat energy present in the air. The heat pump's refrigerant, a special fluid with a low boiling point, circulates through an outdoor coil (evaporator coil) and absorbs heat from the air.
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Cooling Mode: In the cooling mode, the process is reversed. The heat pump absorbs heat from the indoor air, and the refrigerant carries this heat to the outdoor coil (condenser coil) where it is released into the outside air.
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Refrigeration Cycle:
- The refrigerant circulates between the indoor and outdoor coils, changing from a liquid to a gas and back again. As it evaporates in the outdoor coil, it absorbs heat, and as it condenses in the indoor coil, it releases heat.
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Compressor:
- The refrigerant is compressed by a compressor located in the outdoor unit. Compression increases the temperature of the refrigerant, making it capable of releasing heat to the indoor air during the heating mode or absorbing heat from the indoor air during the cooling mode.
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Indoor Unit:
- In the heating mode, the indoor unit contains a coil (evaporator coil) where the refrigerant releases its absorbed heat to warm the indoor air. In the cooling mode, the indoor coil acts as a condenser, releasing heat extracted from the indoor air to the refrigerant.
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Distribution System:
- The heated or cooled air is then distributed throughout the building using a fan and a system of ducts or a ductless mini-split configuration.
The efficiency of an air source heat pump is measured by its Coefficient of Performance (COP), which represents the ratio of heat output to the electrical energy input. ASHPs are known for being energy-efficient, particularly in moderate climates. They are an environmentally friendly alternative to traditional heating and cooling systems, as they use the ambient air as a heat source or sink, reducing the reliance on fossil fuels. However, their efficiency may decrease in extremely cold climates, so it's important to consider the local climate when evaluating their suitability for a particular location.
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See What Our Customers Are Saying:
Jul 28, 2022
On coldest night of the year our furnace quit. At 8:40 in the morning Greg arrived and gave us a diagnosis and a recommendation. By 2:30 we had a new furnace and were warm again. Great company. Great customer service. Good reasonable price.
Peter, Pickering
Jul 3, 2022
Twin tech team was very efficient and prompt. They provided a quote within hours of request and got the job done on time. No disruption to home function. We would highly recommend this team. Job well done.
Jul 3, 2022
Our furnace bit the dust, and Twintech came out to troubleshoot and diagnose the problem within a couple of hours. Mitch was super helpful, patient, and answered all of our questions. When we decided to get the furnace replaced, the crew was over first thing the next morning and did a fantastic job. Not only did they complete the job in a few hours, but they cleaned up and respected our house as they went, and answered all of our follow-up questions. I've used Twintech for our HVAC needs in the past and will continue to do so. I'd recommend them to anyone, and it feels good to support a local, family-owned business.
Jul 3, 2022
Dave and the Twintech team were fabulous from day 1 and helped us through the process to identifying a new furnace and AC unit. This was our first time through this process and Dave did a thorough job explaining all the components and was very patience answering all our questions. Dave provided great insights and fair pricing.
The Twintech team did an awesome installation. Very clean and efficient. I would highly recommended their service.
Jul 3, 2022
We had a new Amana furnace installed by Twintech and we were very pleased with the installation. It is nice to have a warm house again.
Jul 3, 2022
Excellent job. Excellent service. Competitive price. Its rare to find a company with the knowledge and professional results we have experienced with Twintech. The clean and neat installation with attention to detail and drop sheers to respect our property is a clear indication of Twintechs high level of integrity. The 1-1/2 gas line upgrade they did for our pool 3 years ago was awesome. Can't say enough. Thank-you Twintech.
Jul 3, 2022
Twitch did a great job with the installation of our new furnace. I really appreciated their honesty and I could trust what they were telling me. Another company tried to suggest significantly more work at a greater cost claiming it was necessary to meet current building code. Twintech is very fair. All staff I meet were friendly, polite and trustworthy. I would recommend Twitch for a furnace.
Jul 3, 2022
This is a professional team that's easy to deal with. I would strongly recommend them
Jul 3, 2022
Very professional firm from start to finish!
They removed the old oil tank and furnace. They installed air conditioning and a new propane furnace.
Professional installation, on time and no mess.
Very pleased with their work and would highly recommend the company. Our house is three stories so they spent the time to do all the calculations to make sure we would have great performance on each floor.
Thank you again!
Jul 3, 2022
Upon a routine yearly maintenance, it was discovered there was a leak in the heat exchanger and a I needed a new furnace. I know nothing about these things and was completely stressed out. The company I had the maintenance plan with quoted me a huge number to rent a furnace, I just wanted to cry. Then I spoke to Dave at Twintech. He was so knowledgeable and calming, provided me a fair quote and within a few days I had an amazing crew show up to my house and install my new energy efficient furnace! I have already recommended these wonderful people at Twintech to a good friend of mine. Thank you Twintech!!
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