Ground source heat pumps work by using heat stored in the ground from the sun's solar radiation to supply all of the energy required for a home's heating and hot water system.

The top 15 metres of the Earth's surface maintains a relatively constant temperature of approximately 12 degrees Centigrade. This energy can be used to heat buildings indirectly. Pipe is buried in the ground, either in a borehole or a horizontal trench. The pipe is usually a closed circuit and is filled with a mixture of water and antifreeze, which is pumped round the pipe, absorbing heat from the ground. In winter the ground is warmer than the air and buildings above. The anti-freeze mixture absorbs heat from the ground, which is then concentrated and transferred to the buildings. This heat can be used to heat domestic water and a low temperature heating system such as underfloor heating.

The efficiency of a ground source heat pump is measured in Coefficient of Performance (CoP). This is the ratio of units of heat output for each unit of electricity used to drive the compressor and pump for the ground loop. A CoP of 4 means that for every kilowatt of electricity put in, you get 4 kilowatts of energy in the form of warm water. The flow temperature of the warm water is typically between 35 degrees Centigrade and 45 degrees Centigrade; much lower than achieved by a domestic boiler. The units can reach higher temperatures, but the CoP is then compromised. Keeping the temperature at the lower end of the scale ensures the system operates efficiently.

Nu-Heat can design and supply your heat pump requirement. Whilst we are happy to work with any designated heat pump supplier, in purchasing from one source, seamless integration of the heat pump and underfloor heating technologies is ensured with one company taking sole responsibility for everything from design and supply with installation and commissioning by specially trained engineers.

Model 2005 brochure
There are two versions of the Model 2005 available both of which can be configured to take a supplementary heat source such as an oil or gas-fired boiler. Units are manufactured
to the highest quality and are built in Sweden to withstand the weather of Northern Europe.

Model 2005 can heat water effectively when the outside temperature is high; equally, it can
deliver high performance to the heating system at low outside temperatures, find out more....
[ Download Brochure - Model 2005 ( 485KB) ]

Model 1140 brochure
The advanced control system of the Model 1140 heat pump makes it the ideal choice
for houses, flats, apartments and small industrial buildings. There are nine versions
available with an output range of between 5 and 17kW and it can be configured to take
a supplementary heat source such as an oil or gas-fired boiler. The Model 1140 also has
a factory fitted immersion heater as standard – a major advantage, find out more....
[ Download Brochure - Model 1140 ( 560KB) ]

Model 1330 brochure
The twin compressors and advanced control system of the Model 1330 heat pump make it
the ideal choice for larger houses and small industrial buildings. There are three versions
available with an output range of between 22 and 40kW and it can be configured to take
a supplementary heat source such as an oil or gas-fired boiler. Nine Model 1330s connected
together via a control unit can achieve an output of up to 360kW.

The Model 1330 produces heating water and domestic hot water simultaneously with the
unit prioritising domestic hot water by activating one or both compressors, find out more....
[ Download Brochure - Model 1330 ( 696KB) ]

Model 1240 - Heat Pump with integrated DHW brochure
Model 1240 heat pump is a complete heat pump unit making it the ideal choice for
detached and terraced houses. There are three versions available with an output range
of between 5 and 12kW. The Model 1240 is fitted with a 160-litre double-jacket domestic
hot water cylinder, insulated with polyurethane foam to minimise heat loss and also has a
factory fitted immersion heater as standard, find out more....
Download integrated DHW Brochure - Model 1240 ( 523KB) ]

To get more information about the Heat Pumps we supply please call 0800 731 1976 or drop us an email ufh@nu-heat.co.uk