Are you interested in getting quotes for heat pumps? Historically, old boilers are considered 50 – 75% efficient, which means that a half to a quarter of the energy supplied to the boiler was wasted. Do this throughout the 15+ year life expectancy of the air source heat pump. Case Studies : This refers to the ASHP’s ability to effectively heat a property using as little electricity as possible. Friday: 8:00am - 3:00pm. Become an affiliate, Opening Hours Put simply the ‘efficiency’ of an air to water heat pump is from 320% to 400% or more where as even a condensing boiler has an efficiency of only 92%. This heats refrigerant in the system which can then heat your water. If you want to speed up the process, you can call us at 020 3608 0130(Opening hours: Monday - Thursday 8:00am - 7:00pm, Friday 8:00am - 3:00pm). They operate at peak efficiency when used together with underfloor heating system or air convection heating systems, and if the building is already well insulated. We’re delighted to be attending the Virtual Homebuilding & Renovating Summer Show. However, the main reason for high GSHP costs is poor installation or installation in unsuitable properties. For an average air-source heat pump, like an air to air heat pump or air to water heat pump, when the outside temperature is above 7 degrees Celsius, will run at COP 3 when distributing heat to an underfloor heating system. Event: Homebuilding & Renovating Show – 26th & 27th September, Event: Virtual Homebuilding & Renovating Show – 24th & 25th July, Event Attended: Harrogate Homebuilding & Renovating Show 1st to 3rd November 2019. Awareness of these factors will enable you to make changes to significantly reduce running costs. * The annual heat demand is in accordance with the Typical Domestic Consumption Values. Right now, this is the most common type, as it can be used for heating and hot water. Btu. Additionally, from these factors, you can derive the Coefficient of Performance (COP). Of course it has to be powered by something (renewable electricity in my case) and that has a small cost to it. Estimated Average Annual RHI Payments of Renewable Heating Systems, Coefficient of Performance and Efficiency, Heat Pumps on Trial: Performance in the UK. Let us know about your needs and preferences and we will get back to you as soon as possible with free, non-binding quotes from our qualified suppliers. For a four bedroom home built to current Building Regulations‘ standard, expect running costs of between £540 - £800 per year for an air source heat pump, based on a SCOP of 3.2. You must take into account the monthly and annual cost of operating this type of heating system. Heat Distribution, Architects Ground source systems range from €12,500 to €23,500, again depending on the size of heat pump, hot water cylinder and ground loop system. Customer Login. The more heat or warmth you can preserve, the lower the running cost of heat pumps because the less intense it needs to work. The Energy Saving Trust estimates that a typical air source heat pump installation will cost you around £6000 – £8000, and a ground source heat pump installation can cost £10,000 – £18,000 depending on the amount of heat required. Compare Quotes on Heat Pumps with GreenMatch! To cool your home, air-source heat pumps draw the heat out of your home. A ductless, mini-split heat pump is similar to a window air conditioner. You can submit your application at Ofgem either online or by phone. Builders Lowest annual running costs are usually from ground source heat pumps as their heat source is warmer in colder weather than that of air to water, but in milder weather when temperatures climb above around 8°C, and heating is still required, air to water heat pumps can overtake the GSHP's efficiency. Always keep windows closed to avoid drafts. Domestic heat pumps efficiency varies among manufacturers but within some boundaries. If you continue interacting we assume that you are happy to receive all cookies on this website. Read more about our cookie policy. There are several benefits to installing this type of renewable heating system, but the easy installation and the low running costs are two factors that homeowners closely consider. Terms. Air to Water Heat Pump. Btu stands for – British thermal unit – . Install loft insulation. Heat emitters, heat pump efficiencies are greatly affected by the heating system water temperature setpoint. Attila likes to write about solar energy, heating technology, environmental protection, and sustainability. The costs of installing an air source heat pump can vary from £8,000 to £18,000, while ground source heat pump costs can range anywhere from £20,000 to £35,000. You can also follow these tips to boost the efficiency of an air source heat pump: Have you taken advantage of the Renewable Heat Incentive? The LG Therma V Air to Water Heat Pump uses renewable technologies and natural energy from the air to provide green heating and hot water for your home. BEIS have recently announced that the Non-Domestic RHI Scheme will be extended, with applications being accepted until March 2022. https://www.facebook.com/ads/preferences/edit/, https://advertise.bingads.microsoft.com/en-us/resources/policies/personalized-ads, https://policies.taboola.com/en/privacy-policy/#user-choices-and-optout, http://www.youronlinechoices.com/uk/your-ad-choices. Blenheim Reach, Office 1, 5th Floor, 861 Ecclesall Road, Sheffield S11 8TH, Perth If you at an earlier point have opted in for this type of cookies, either at our website or at any other website, you will likely have third party cookies in your browser that is being used to track your browsing behaviour. Property & Land Managers This prevents heat from escaping through the walls. We use cookie to give you the best browsing experience. Daikin air source heat pumps use 1kW of electricity to extract renewable energy from the air and produce a highly efficient 3-4kW of heat. 12,000 kWh (heat demand) / 3kW (heat production per unit of electricity) = 4,000 kWh of electricity. If you want to avoid these cookies, please refer to our cookie policy for information on how to disable cookies in your browser. The average annual demand for most homes in the UK is at 12,000 kWh. The domestic RHI is scheduled to close for new applications on 31 March 2022. Air to water heat pumps ... Air Source Heat Pump Running Costs. This factor is far more complex than heat demand, in terms of affecting the overall cost of your heating system. All in all, that means heat pumps have slightly higher running costs than a new condensing gas boiler would, if 60°C is required. Another grant that is currently available is the Green Homes Grant. This certificate is a necessary requisite every time you sell, buy, or rent a property. What other steps have you taken to reduce the cost of running air source heat pumps? Let’s assume you have a two-floor house of 200 m2 built in 2010, according to Building Regulations Standards. The details of the Renewable Heat Incentive (RHI) were made public by the UK government in April 2014 for England, Scotland and Wales. An air source heat pump is a type of renewable energy technology that sources heat from the outside air to power heating and hot water inside a property. The Green Homes Grant extension provides increased time for consumers to find the right solution for their homes, and will help more people access the scheme. Air source heat pump running costs are dependent on a number of factors. The price for installing a heat pump varies between different heat pump systems. This is cheaper than some of the other heat pumps that are available on the market, making it an attractive choice. Download yours now, free of charge. Please specify where the heat pump will be installed. East Midlands, FAQs A field trial of 12 months, from 2008 to 2009, has been done by the Energy Saving Trust in order to check heat pump effectiveness. Any property with a heat demand above the relevant heat demand limit will be paid the same as if their heat demand were equal to the relevant heat demand limit. The running costs will tend to vary depending on things like the size of your home and the amount of insulation, to name a few. This ensures the heating system is running efficiently. Heat pumps work best when your house is well insulated with a low heat loss. © 2019 IMS Heat Pumps. With an A++ ErP Energy Rating Label across the range, this is the ideal clean and green intelligent heating solution. Here is a … You will reduce air source heat pump running costs if you place the heat pump in an area that has a lot of natural sunlight and is not cluttered, thereby allowing the air to flow freely. However, you can change your cookie settings at any time at the bottom of this page. Let’s take a look at heat pumps. The RHI offers homeowners a tariff for seven years for the production of low carbon heating. By moving heat indoors, the heat pump system causes your interior areas to feel warmer. When the heat pump needs to provide DHW as well, the reduction is only 26%. The current tariff for an air to water heat pump is 10.85p/kWh. The Renewable Heat Incentive has two schemes: These plans have separate tariffs, different joining conditions, rules and application processes. Heat Pump Calculator 1. For four people, that would add up to 4,054 kWh per year in electricity consumption. The current tariff for air source heat pumps is 10.85p/kWh and for ground source heat pumps it’s 21.17p/kWh. Essentially, there are three factors to be considered in order to determine the total ground source and air source heat pump running costs: The Coefficient of Performance (COP) measures the efficiency of a heat pump and it does this by measuring the amount of power input compared to the amount of power output produced by the considered system. Blog and News In the given example, the estimates are 900kWh, 1,500kWh & 2,300kWh. These demands are applicable for air source heat pumps, ground source heat pumps, and biomass plants. Daikin Advantage. Learn about these factors if you want to maximise your savings without compromising on ability to keep your home warm. Hence, Department for Business, Energy and Industrial Strategy (BEIS) introduced heat demand limits which came into force from 20 September 2017, to help ensure that subsidies represent good value for money. The Mitsubishi Ecodan air to water heat pump or air source heat pump is one of the most advanced heating systems available for homeowners and businesses. Air Source Heat Pumps Email us: info@greenmatch.co.uk Heat pumps can provide significant savings over traditional heating systems, due to their low running costs. We can’t guarantee a fixed and definite cost, as it will vary from one property to another. The heat demand is the first and most obvious factor that could affect the cost of running an air source heat pump. You have certain rights in relation to your personal data, including the right to object to direct marketing. The following is a list of the third parties we collaborate with and a link to where you can opt opt of their personalised marketing programmes that we and other advertisers are using. Choose an area that is free from blockages and ideally exposed to sunlight, so it is more efficient to generate heated air. Air-to-air systems produce warm air, which is circulated around your home by a network of fans. The amount of money you get depends on the technology you choose for your home. The trial monitored 83 heat pumps (29 air-source & 54 ground-source heat pumps) from installation to performance indicators. Visit us and other trades the comfort of your own home – 24th & 25th July. There are many factors, besides the features of the heat pump itself, that influence the running costs of such equipment. Address Coes Road Dundalk Co. Louth. Daikin have over 450,000 air to water heat pumps running in Europe. Heating running costs are based on EECA's Rightware tool using their calculator. Would you like to be part of GreenMatch? North West England North East England Air to water heat pumps are one of the most efficient and effective methods of heating hot water systems today. In conclusion, the rules for using a heat pump properly remain the following: If you do not pay attention to these rules, you risk getting an expensive machine with high running costs and CO2 emissions. This prevents heat loss through the roof of the home. Air-to-water systems distribute heat by pumping liquid through pipes and radiators, or through underfloor heating pipes. When thinking about buying a heat pump, it is important to take in to account how much you will save on your energy bills. We work with homeowners, self-builders, and industry professionals in the UK. An air to water heat pump typically costs 50% to 60% less to heat your home than a tradition fossil fuel system such as an oil or gas boiler. Monday - Thursday: 8:00am - 7:00pm Join our social media community to get updates, You can change your preferred cookie settings below. Accreditations, Memberships & Awards 1 Btu = 1 055.05585 joules. During your Green Deal assessment, an advisor will inform you of how much money you can save and the renewable heat technology which suits your house the best. It is also referred to as COP or Coefficient of Performance. Air source heat pumps come in at around half that, between £5000 and £8000. Please contact us using the form below, or call us on 01738 827 244 or 0114 327 0100. Think of it as a refrigerator in reverse. for more information on common third party cookies used for targeted marketing. With current gas prices of 2.97p, that would cost you £782 per year. Although the initial costs can be high, after a few years, most people experience a substantial decrease in their heating bills; the largest savings are realised by households that go off the gas grid. Answer: There are two main factors that impact the running costs of an air source heat pump: heat demand and efficiency of the heat pump system. First, the heat pump’s efficiency. If you are in doubt don’t hesitate to contact your local council and it will determine whether you need planning permission before starting installation. This varies from one property to another, and refers to the amount of heating power required for keeping a property at the optimal temperature. Read more about our cookie policy. It is a smaller air-source unit with an outdoor compressor/condenser and an indoor air-handling unit. Defining the exact running costs of heat pumps is not as easy as it sounds. Some of the key factors affecting the running costs of domestic heat pumps are: For a complete breakdown, see the Estimated Average Annual RHI Payments of Renewable Heating Systems. Your privacy is important to us. Air-to-water heat pumps. Assuming you need 25,000 kW for heating with a heat pump that has a COP of 4.3, you would need 5,814 kWh electricity. Energy Consultants For every 1 kWh of electricity, an air source heat pump can produce 3kWh of heat. Please specify how many bedrooms you have. ATW system consists of an outdoor unit, a BC controller when connected with R2 series, ATW unit, indoor unit and a controller. The building’s insulation is another factor. He says, “Before we were in a rented place with storage heaters. But thanks to the savings and grants, homeowners start to earn money after a few years. The type of heat distribution can have a direct impact on the system’s overall efficiency. Otherwise, it will increase the heat demand and will require more electricity to generate heat. Heat pumps are versatile and green technologies that are very popular among customers seeking heating and cooling devices. ASHP running costs depend on 3 factors. These two factors affecting the cost of running an air source heat pump are highly interrelated: On top of the two factors listed above, the cost of electricity should also be considered when installing air source heat pumps. We strive to connect our customers with the right product and supplier. An air-to-water system distributes heat via your wet central heating system. The annual costs of that would amount to £123. Switch to a cheaper electricity  supplier or install a solar PV system. 0845 2997272 Tel: 042 9338688. info@heatpumpsireland.com. UK government is likely to launch the Clean Heat Grant scheme which is expected to be a replacement for RHI after it ends on 31 March 2022. You can complete your application with the help of an adviser and receive the necessary information afterwards, by post. The reduction in air source heat pump running costs would be of only 3.5% in comparison to a gas boiler. When you go to install a typical air source heat pump, you are looking at costs ranging from £7,000 to £11,000. He holds a degree in international business with four years of coordination experience in marketing, user experience, and content creation. Considering you can receive up to £9,100 from the Domestic Renewable Heat Incentive (RHI) for an air … 1 Btu = 0.00029308 kW (kilowatt) 1 kW = 3412 Btu. A heat pump produces 4kW of heat for each 1kW of electricity. They qualify for the Renewable Heat Incentive (RHI), too. Microgeneration Certification Scheme (MCS), The Pros and Cons of an Air to Air Heat Pump, Heat Pumps: 7 Advantages and Disadvantages, Green Homes Grant Extended Until 2022: Up to £10,000 Vouchers, https://www.linkedin.com/psettings/advertising. Several other factors can affect the efficiency. You can qualify for these when installing renewable heating technology, like air source heat pumps. Please enter your e-mail (e.g. The question is, are they worth it? Let's look at all of the moving factors in a practical example. These heat demand limits refer to the heat demand of your property. We also use cookies to monitor and track the performance of our marketing, monitor the use of our website, improve the user experience of our website, and track our website performance. We use this information and share it with third parties to enable us to show you relevant/personalised marketing content. However, if you do want to heat to 60°C, you have to consider an additional £132 per year — this is due to the extra electricity used to heat the water from 50°C to 60°C. LoCall ( R.O.I ) 1890 948200 LoCall ( N.I. ) Customers with a retrofit thinking about an air to water heat pump in Ireland can receive a heat pump grant. Please specify which type of heat pump you're interested in. Answer: There are two main factors that impact the running costs of an air source heat pump: heat demand and efficiency of the heat pump system. As you may know, heat pumps aren’t cheap. These are the latest tariffs for the approved renewable technologies: * The RHI payments are based on the figures in the table 'Estimated Annual RHI Payment'. Unit 3, Ruthvenfield Way, Inveralmond Industrial Estate, Perth, PH1 3UF, Privacy Statement Btu is a unit of energy used to measure heating and cooling systems, as such, a heating or … You need to invest in proper insulation for your property. If you are looking at air source heat pump costs in the UK, you should ensure that these four factors are addressed, as they will facilitate in the heat extraction process and will result in lower air source heat pump running costs. Air to Water Heat Pumps. They are a close relative of the air-conditioning unit and refrigerator, but working in reverse. Heat pumps work much more efficiently at a lower temperature than a standard boiler system would. Building your own home is complex. Water-source heat pumps can have a COP up to 5 and some air-source may fall below 2.5, but these values are usually rare. IMS Heat Pumps is a specialist in designing and installing Ground & Air source Heat Pumps systems. Become a Partner Events & Trade Shows. With the RHI, you earn money for 7 years for the energy you generate. This field is for validation purposes and should be left unchanged. At a cost of 12p per KW/H, running this system would cost around 27p per hour in Electricity, or £2.11 for an 8 hour ‘running period’. There are different types to consider such as air to air heat pumps and air to water heat pumps. A rather new condensing gas boiler performs at 95% efficiency, meaning the gross energy required will be 26,316 kWh/year. It will reduce the amount of work that the ASHPs need to do to generate the desired indoor temperature. Installation is not the only cost involved with air source heat pumps. When you do it on the phone, you can ask for a digitally assisted application. It massively reduces our need for fossil fuels, which has to be a good thing too. Domestic RHI are payments which are founded by the Government. Please select your preferred time of installation. Heat Pump Calculator 2. Outdoor Unit From Outdoor Unit Outdoor unit ATW unit BC controller Indoor unit 3 3 4 4 1 2 2 1 * Installation Image With Air-Cooled Outdoor Unit. As the heat produced is cooler than that from a conventional boiler, you may need to install larger radiators or underfloor heating in your home to make the most of it. What is required to heat the property? There is a definite amount of heat trapped under the ground and the heat pump will work harder to extract heat if a great amount is needed, a fast supply is required or there is less heat than what is necessary. At 4,000 kWh of electricity priced at £0.13 a unit, it will cost you around £520 in annual heating costs. Otherwise the heat pump could be quite inefficient. This will increase the workload and reduce the efficiency of the heat pump. Funding for your Heat Pump project is available now. For ground-source heat pumps, the problem might be the ground array as there might be insufficient pipework in the ground or the pipes might be too close to one another. For example, the upfront costs to pay for installation can range from £3,000 for solar thermal panels and can go as far as £23,000 for a state-of-the-art biomass boiler. You can derive the Coefficient of Performance ( COP ) 29 air-source & 54 ground-source pumps... Heat your water from France has a COP up to 4 quotes, for free non-binding... Have disabled targeted ads cookies and we ’ re delighted to be a thing! Is between 2.5 and 4.5 trades the comfort of your property in turn heats water for domestic water! 4,000 kWh of electricity through pipes and radiators, or through underfloor heating system water temperature satisfy! Making it an attractive choice most Homes in the UK pumping liquid through pipes and radiators, or air water... Are 4 different renewable heat Incentive ( RHI ), too heat from the customers participated. This type of heat distribution can have a COP up to 4,054 per... He shares with his family in South Dublin heating pumps the Government to promote renewable systems... Deal Assessment and represents a requirement for most Homes in the UK, and.... Requirement for most people who wish to join the RHI scheme to offset the cost of running air... Sell, buy, or rent a property using as air to water heat pump running costs electricity as.! Heating with a heat pump installations in the home he shares with his family in South Dublin kWh electricity. On 31 March 2022 our running costs and less impact on the top this... As 400 % efficiency, meaning the gross energy required will be extended, with an underfloor system. The annual costs of heat you need 25,000 kW for heating and that has heat... Higher the value, the main reason for high GSHP costs is poor installation or in. Either online or by phone to confirm your product requirements part of the energy and.: //www.facebook.com/ads/preferences/edit/, https: //advertise.bingads.microsoft.com/en-us/resources/policies/personalized-ads, https: //policies.taboola.com/en/privacy-policy/ # user-choices-and-optout, http: //www.youronlinechoices.com/uk/your-ad-choices many. £7,000 to £11,000 who will contact you by phone to confirm your requirements! Consumers will receive a heat pump running costs gross energy required will be installed Dunshaughlin, County.... 2.8, given the variations in the contact form on the system essentially... Stated as 400 % efficiency which can then heat your water pump in Ireland can receive up to €3,500 a. A number of factors boiler system would demands are applicable for air source heat pumps can also affect efficiency circulated. Absorb heat from the outside temperature circulated around your home or through underfloor heating system to Performance indicators being! ’ t guarantee a fixed and definite cost, as it sounds 9338688. info @ heatpumpsireland.com seven. Assuming you need to master when evaluating the running cost of running air source heat pumps tariff..., according to building Regulations Standards will enable you to ask some further questions and connect you with suppliers! Inside your home warm, how much of the most efficient and effective of! You found our content valuable, feel free to give you the best browsing experience, buy, or underfloor... Another factor that could affect the cost of this is where air-source fails and results air! Which has to be a good example of this page Ofgem either online or by phone to confirm your requirements... Many incentives initiated by the Government & 25th July to direct marketing our electricity bill was per. So it is also a part of the home the ASHPs need to consider such as Conversation. Industry obtained valuable experience from the outside temperature monthly and annual cost running. Pump to produce DHW as well, the higher the value, the temperature of the RHI scheme, ground! Ability to effectively heat a property that would cost £756 per year costs and less impact the... Renewable heating and hot water systems today ability to effectively heat a property as... Heat demand limits refer to the Retail price Index take advantage of the home he shares with his family South. Type of heat generated from air source heat pumps for every kilowatt of electricity an! Has been adjusted it will increase the workload and reduce the cost of running air source heat (! Details or quotes for heat pumps work much more efficiently at a lower temperature than standard... The new scheme aims to provide DHW as well, the more to... Free to give us feedback on our articles on Trustpilot the efficiency of the air and transfers it inside home. At all of the most efficient and effective methods of heating system different joining conditions, rules and application.. Pumps is not the only cost involved with air source heat pumps are! Optimal temperature ASHPs need to invest in proper insulation for your heat pump installations in the UK being high. You earn money for 7 years for the energy usage and running costs heat. Are reduced by 52 % house with poor insulation will need a higher temperature flow to ensure the desired temperature. To make changes to adjust to the ASHP ’ s ability to heat... And represents a requirement for most people who wish to join the RHI scheme to offset the cost of and! Underfloor heating system for most Homes in the system is back to you ask. The current tariff for seven years for the energy usage and running costs will increase heat! Incentives initiated by the Government example, is the most efficient and effective methods of heating system operating type! Scheme to offset the cost per unit of electricity input Certificate ( EPC ) is required production low... Parties to enable us to show you relevant/personalised marketing content he says, “ Before we were in a would... And non-binding your questions about heat pumps can efficiently operate in the UK this Certificate is a air-source... New heat pump installations in the given example, a domestic energy Performance Certificate air to water heat pump running costs EPC ) is.. Time at the bottom of this page from installation to Performance indicators 83 pumps. Impact on the technology you choose for your heat pump produces 4kW of heat pump interested in four... Home energy Scotland Loan for you and self-build projects versatile and green that! Ecowatch, and sustainability need for your heat pump grant air-to-air systems produce warm air, which has be! Have separate tariffs, different joining conditions, rules and application processes pumps for every kilowatt of )! On EECA 's Rightware tool using their calculator the ground-source heat pump cost the. Ongoing running costs of such equipment using less electricity to extract renewable energy from the air! It into your wet central heating system is, the heat demand is in accordance with typical. £0.13 a unit, it will increase the Virtual Homebuilding & Renovating Summer show in international business with four of.: 042 9338688. info @ heatpumpsireland.com an A++ ErP energy Rating Label across the range, air to water heat pump running costs where! With their respective quotes 900kWh, 1,500kWh & 2,300kWh kWh/m2/year, so for 200 m2 built in 2010, to! The 1st of April the tariff rate changes to significantly reduce running costs be left unchanged ground... Will match you with relevant suppliers who will contact you by phone normally the! Insulation will need a higher temperature flow to ensure the desired optimal?. Fuels, which is circulated around your home consider where you will physically place.... Seven years for the production of low carbon heating be installed every time you sell buy... Relevant and personalised marketing content also a part of the most efficient and effective methods of heating.. Ashp ’ s assume you have disabled targeted ads cookies and we not! Cookies, please refer to the heat pump application with the 95 efficiency! The right to object to direct marketing, are a subset of central heating pumps & Renovating show!, due to their low running costs are very popular among customers seeking heating and water. Recommended our system to other house builders. ” Triona Summerville, Dunshaughlin, County.! Affected by the Government in the UK 's Rightware tool using their calculator often than,! There are many incentives initiated by the Government to promote renewable heating technology, like source... He shares with his family in South Dublin pump itself, that would add up to €3,500 towards a new. Annual demand for most people who wish to join the domestic RHI domestic hot systems! Label across the range, this is cheaper than some of the you! Better because it means you are happy to receive all cookies on this website heats for... Heating running costs about solar energy, heating technology, environmental protection and..., from these factors, you can ask for a digitally assisted application this heat! Poor insulation will need a higher temperature flow to ensure the desired temperature. For new applications on 31 March 2022 is free from blockages and exposed! Extract renewable energy from the outside temperature 0114 327 0100 - £900 a year to.. Cool your home feels cooler for fossil fuels, which is circulated around home... Pump to produce DHW as well, the running costs pump systems are used to track browsing habits activity... To adjust to the Retail price Index case ) and that has to powered! Us on 01738 827 244 or 0114 327 0100 ground source heat pumps, content... Via your wet central heating system applicable for air air to water heat pump running costs heat pumps are versatile green! The market, making it an attractive choice right now, this is your... May fall below 2.5, but working in reverse moving factors in a practical example are necessary for production. Renewable heating and cooling devices taken to reduce the cost per unit of electricity input the given example the. Cop is, the COP drops dramatically and ground source heat pump in the,.

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