Aside from obvious differences between air and ground source heat pumps like where they absorb their energy from; there are other factors that could make your decision easier.
Both heat pumps are standalone units that are usually installed outside of your home or business place, although ground pumps can also be placed inside. The air source pump must be outside and is then connected to an indoor unit to emit the heat accordingly.
The pollution levels for electricity are another important factor to consider. The co2 levels are predicted to rise each year and facts show that every little helps when making the switch.
If cost is an issue then you must bear in mind that the efficiently of your new heat pump could cost more at first but in time you will reap the rewards from saving on heating bills. The reason for this is that the pumps work most efficiently at lower temperatures and therefore take longer to heat an entire home as it is more environmentally friendly. It is recommended (although not necessary) that radiators are bigger and underfloor heating is installed to take advantage of this. A general price guide sees a Ground source pump costing up to £10,000 more than a £5,000-£7,000 air source pump.
Both Ground source and Air source pumps are eligible to run through the Renewable Heat Incentive (RHI) but the amount tends to differ. As an expectation you can see a 80%-110% of your initial costs covered for ground source and 70-80% of the costs covered with air source over the 7 year RHI scheme currently in place.
Generally the Ground source heat pumps are very efficient; they move energy rather than create it and improve performance by 300% e.g for every 3kW of heat moved into your home it only uses 1kW of electricity. On the other hand – every 2.5kW of heat moved into your home from the air source heat pump uses 1kW of electricity which is a performance efficiency of 250%!
When comparing the two pumps, studies show Ground source pumps can be up to 20% more efficient. The ground source pump will tend to out live the air source pump which furthers the long term benefits. Even if it needs replacing after 25 years, it is a not a high cost system therefore it is still an investment.
Another option to push the air source option forward could be making use of Green Square’s boiler stoves in your home. These will help in the Winter months and they make a great team.
Key points and things to consider
- Space – Air flow is key around the air source heat pumps so make sure there is enough room. Ground Source Heat Pumps do not tend to be as big but do require digging around the area.
- Current Insulation – Both work best using lower temperatures for longer time periods therefore it will work in your favour to ensure home is as well insulated as possible beforehand.
- Fuel usage – Your costs will be covered at a quicker rate if you are replacing electricity or coal system rather than replacing mains gas.
- Heating method – Can perform to a higher standard combining heating methods e.g stoves, underfloor heating and bigger radiators.
With a consultation at Green Square we can help you further with any queries you may have regarding air and ground source heat pumps. Our aim is provide clear and accessible information on our products to find the best option for you to meet your present and future needs.