Energy Saver System

This may sound a bit complex, so further down on this page we explain how this works in more detail and we also provide links to further reading.

When used for heating heat pumps move heat from the outside in to the building. The source of the heat can be the ground, water or air.

An air source heat pump (ASHP) uses the outside air, which is often easier, cheaper and more effective than the two other sources.

This method of providing heat can be surprisingly effective, often providing three to four times as much heat compared to the electricity consumed in running the unit.

The Energy Saver heat pump has been further enhanced and has been proven to deliver real life heat performance of 800% when compared to traditional heating systems.

History and today

Heat pumps are in fact very common and every home has one as the refrigerator is a simple heat pump (heat is moved from the inside of the fridge and evaporated at the back).

The first heat pump systems for domestic heating was built in the 1940s in America. The first mass market deployment was of ground source heat pumps (GSHP) in Sweden and the Nordic countries in the 1970s. Today there are about one million GSHPs installed around the world.

In the late 1990s domestic householders in Sweden started to demand a cheaper solution than GSHP (£ 20,000 fitted), and suppliers started to fit split type reversible air source heatpumps, as these could be fitted for 15 to 20 % of the cost of a GSHP. These had been used primarily for cooling / air conditioning in warmer climates, but the more advanced ones could be reversed and provide heating instead.

These became very popular and more than 800,000 have been fitted in Sweden alone, often saving owners well in excess of £ 1,000 per year and with a short pay back period of only a few years.

Countries with similar climates i.e. the Nordics, Switzerland, Austria, Canada and the nothern parts of USA have also installed many thousands of these systems. United Kingdom has seen fewer systems deployed, but we have now installed several hundred systems since 2007, and with a very satisfied client base.

EHS and The Energy Saver

There are a number of different suppliers and makes of air source heat pumps. Some are of course better than other. We performed extensive market analysis and research prior to starting EHS early in 2007, with particular focus on Sweden, as it is the leading market in adoption of heat pumps of all kinds.

1. Sweden has exentensive and detailed fault statistics collected since 1999, containing details about manufacturer and what component has gone wrong. Uniquely we are therefore able to offer solutions with the proven best quality.

2. The Swedish market air to air heat pumps have been substantially improved for heating.

• effective COP up to 8.5
• proven at minus 20° C
• 50 to 100% more heat at +7° to +2° C
• four times more heat at +2° C and below

Those are the ones we sell here in the UK.

More details about Air Source Heat Pumps

An air source heat pump is an electrical device that extracts heat from one place and transfers it to another.

The heat is transferred by circulating a substance called a refrigerant through a cycle of alternating condensation and evaporation.

A compressor pumps the refrigerant between two heat exchanger coils, the condenser and the evaporator. In the outdoor condenser, the refrigerant is condensed at low pressure and absorbs heat from its surroundings.

The refrigerant is then compressed on its way to the indoor unit evaporator, where it evaporates at high pressure. At this point, it releases the heat it absorbed earlier in the cycle.

The refrigerant is then passed through an expansion valve where the pressure is lowered, and again passed through the condenser.

The Energy Saver is comparatively non-intrusive to install. The indoor and outdoor units need to be connected for electricity and refrigerant. Further, the indoor unit needs to have a condensation evacuation hose routed outside.

These connections are made through a 50mm/2" hole in a wall that is drilled during installation. The maximum distance between the indoor and outdoor units is dependant on the model selected and range from 15 to 50 metres.

Most units are installed within one working day, however it can take longer for more complex installations, e.g. if there is more than one unit or if the concealed solution is specified.

We normally provide a pre-installation site survey.

The Energy Saver works as a highly effective heater which can be extremely cheap to run – if you follow these simple guide lines.

Keep the unit on

Heat distribution as well as running costs is improved if you leave the unit running – that is to say do not turn off the unit if you leave the building for a few hours, or at night. It is better to lower the temperature on the remote by a few degrees if required.

Keep doors open

Heat distribution is also improved if you leave doors open as much as possible. The unit will not perform well if doors are shut.

Optionally we can supply a fan assissted Heat Transfer Kit to improve circulation while doors are closed.

The Energy Saver requires very little maintenance.

The only maintenance required is for cleaning the air filters in the indoor unit. They should be cleaned several times per year - frequency depending on use and building.

The filter cleaning only takes a few minutes - remove the dust with a soft brush, vacuum cleaner or a damp cloth.

(It could be useful to have a spare filter set if the unit is in a difficult to reach position.)

The filter location depends on the solution installed. You will be shown how to clean the filters during installation.

There is no need for an annual inspection.