Air Source Heat Pump
An Air Source Heat Pump uses a refrigerant to absorb heat from the outside air, which is then used to heat your home and/or hot water.
For every unit of electricity used to power the pump, 3-5 units of heat are available.
So if designed correctly (to industry design calculations) for every 1kw of electricity that you input you would get 3kw to 5kw of heat output.
With the government aided rhi scheme paying 7.30p per Kw (May 2015) and the current average electricity cost per Kw unit being 12p. You would in essence be paying 4.7p per Kw for the unit of energy input to the heat pump which is around the average cost of a Kw of Gas. But with a ratio of 3 to 5 efficiency you could more than half your annual heating/hot water running costs.
Biomass and Wood Burners
Biomass boilers are an effective way of using renewable energy to benefit the environment, increasing the energy efficiency of your home and reducing your fuel bills.
For people living in rural areas where mains gas is not available, a biomass boiler is an attractive alternative to more conventional off-gas heating solutions such as oil and LPG. Cleaner and less volatile, biomass boilers are also independent of the fluctuating prices of oil and gas.Apply for a grant
You can claim a voucher of £2000 towards the cost of a biomass boiler through the Renewable Heat Premium Payment scheme, which has been extended until March 2014. You can find out if you are eligible and what you have to do before applying on the Energy Saving Trust website.
Modern biomass boilers are highly sophisticated and worked at over 90% efficiency. The Baxi Bioflo is 94% efficient, which means it uses almost all the fuel it burns to generate constant heat and hot water for your home in a similar way to a conventional gas system boiler.
Biomass fuel is widely available throughout the UK. As well as guaranteeing supply, the use of UK-sourced biomass can support the rural economy by offering local business opportunities as well as keeping transport costs to a minimum.
The expanding market for biomass fuel also encourages biodiversity by providing an economic incentive for managed woodland.
When compared with fossil fuels, like oil, gas or coal, biomass is a sustainable, carbon neutral fuel.
A biomass boiler offers an environmentally sound heating solution as it emits on average the same amount of carbon dioxide that is absorbed by plants, thus having little or no adverse effect on the earth's delicate CO2 balance.
It's not just Biomass that is eligible for government paybacks but there are some log burners on the market that can make use of the 7.14p/Kw offered scheme.
Gas Absorption Heat Pump
The unit that we fit is 144% efficient and has a 28kw input and a 41kw output. You save 13kw of energy in relation to a conventional gas fired heating boiler of the same output. If the unit were to run for at least 4680 hours through the year (15 hours a day through a 6 day week all year) you’d save 60,840 kw/h. If this energy was to be produced by other means such as natural gas at say a rate of 5p per kw/h you’d save at least £3042 a year on your fuel bill. In approximately 6 and a half years this unit will pay for itself and the fitting costs associated with it. During this time it would have contributed to protecting the environment saving approximately 50 tonnes of CO2 over the 6 and a half years. Obviously if the unit is required to run more operational hours then it will save more money and pay for itself quicker.
Rain Water Harvesting
In the UK there is a lot of water wasted every year not only from excessive use but from the lack of harnessing the water that is already delivered to the properties naturally. The rain water harvesting set up allows you to collect this water that would have normally been wasted. Around 52% of your water that you use doesn’t have to be mains fed drinkable treated water. It can be what we call grey water which is essentially the water that a rain water harvesting system collects. The system can feed your outside hoses for external uses such as washing vehicles and building maintenance and can supply your washing machines. It can also feed the toilets where 33% of a buildings water normally gets used.
With units on the market that can provide up to 60% of your hot water demand per annum solar thermal investment should be given thought. With one of the highest technology rhi's at current (currently 19.51p per Kw), low installation costs and harnessing free energy the system could pay for itself within 3 - 5 years. Which means the remaining 17 - 15 years of estimated product lifespan would be an extremely lucrative investment. The only energy consumption that solar thermal products consume is that of the circulation pump and controller (less than a 100w light bulb).
Ground Source Heat Pump
A ground source heat pump system harnesses natural heat from underground by pumping water through it. The heat pump then increases the temperature, and the heat is used to provide home heating or hot water.
The pump needs electricity to run, but the idea is that it uses less electrical energy than the heat it produces.
The heat pump performs the same role as a boiler does in a central heating system, but it uses ambient heat from the ground rather than burning fuel to generate heat. Unlike an air source heat pump, which takes heat from the air.
A mixture of water and anti-freeze is pumped around the ground loop and absorbs the naturally occurring heat stored in the ground. The pump itself consists of an evaporator, a compressor and a condenser - together these take the heat from the water mixture, transfers it to your domestic heating system and increases the temperature in the process. A ground source heat pump increases the temperature from the ground by between one and a half and four times – so if the ground temperature is 12°C, the output would be between 18 and 48°C).