• Replaces an oil or gas boiler
• Produces all your domestic hot water and hot water for the under floor heating
• Saves you up to 70% on your energy bills
• 100% less carbon dioxide than fossil fuels if you buy “green” electricity
• For every 1 unit of electricity used 4 units of heat are produced. This means 75%
• your energy comes free from the land, water or air around your building, the other 25% comes from electricity used to drive the heat pump
• 20+ years system lifetime
• Inflation and tax proof investment, the government can’t tax your garden
• Always available, whatever the weather, day or night
• Lower temperature output ideal for use with under floor heating
• The average ground temperature just below the surface in the UK is between 8ºC and 13ºC. This temperature remains constant throughout the year.

By compressing this warmed refrigerant further heat is generated and this means that water output from the heat pump is typically 35ºC - 50ºC for space heating and up to 55ºC for domestic hot water.

Your domestic fridge uses the same technology. As you put food and drink in to your fridge the low grade heat it carries (after all it's usually warmer than the inside of the fridge) is transferred from the ice box to the refrigerant in the unit. The refrigerant is then compressed and expanded to raise the heat, this high grade heat is then expelled from the back of the fridge. This is why the inside of the fridge remains cold whilst the back of the fridge gets hot.

Because the vapor leaving the compressor and entering the condenser is hotter than the inside air, heat flows into the air flow from the vapor as the air passes the blower. This warms your home. As the heat is removed while the hot vapor passes through the condenser, the vapor condenses more and more until it exits the condenser as a liquid. This warm liquid enters the flow control unit, which monitors the amount of vapor arriving at the liquid flow control (LFC), and meters liquid only through the device for its return to the earth loop field.

Horizontal or Vertical Closed Ground Loops - Where there is plenty of land available, polyethylene pipe is laid in trenches approximately 1m deep and a mixture of water and food grade anti-freeze ('brine') is circulated to collect energy from the ground. Alternatively, where space is tight, a closed U-tube in a vertical borehole ranging from 25m - 150m deep can be used.

Air Source System - This harnesses the solar energy that is in outdoor air. No digging or drilling is needed so the installation is quick and simple. It is ideal for urban sites where there is very little ground space.

Vertical Open Water Loops - This type of system can be used where ground water is plentiful. Ground water from an aquifer is pumped through the heat pump and then after the heat is exchanged it is pumped back to the same aquifer via a second well, called a discharge well, located at a suitable distance from the first.

Closed Pond or Lake Water Loops - If your building is near to a lake or large pond it may be more economical to use the closed system of 'brine' circulating through the polyethylene pipe and lay the pipe under water. This can also save digging trenches or boreholes as with a ground loop. A 'slinky' shaped coil of pipe can be laid underwater if more pipe is needed in a given amount of space.

The only energy efficient way to distribute the heat generated from a heat pump system around your building is with a properly designed under floor heating system. Under floor heating systems will run at much lower temperatures than radiator systems. We design our systems to ensure that enough pipe is laid to enable the heat pump to run at the lowest temperature output possible and therefore be as efficient as possible. This usually means running pipe at as close as 100mm centres throughout the building compared to on average 200mm centres for a system powered by a gas boiler.

The warm water generated by the heat pump is pumped by an external pump along a 28mm flow pipe to the manifold(s) where the under floor heating circuits distribute the water to each room. Because of the low water temperatures involved heating controls, ie. room thermostats, are not necessary. Room temperature control can be achieved by adjusting the water flow rates at the manifold and the heat pump itself is weather compensating so will adjust the output temperature as necessary.

A heat pump system is suitable for well insulated buildings of all types and don't forget - it will supply your domestic hot water needs as well.