Air source heating is an established and proven technology delivering 100% of your heating and hot water requirements. It will save money and keep you warm. The air source heat pump technology is a credible alternative to traditional methods. It can help to combat energy bills through greater efficiency.

The technology in a modern air-source heat pump is an ideal choice when considering a heating system for:

  • New buildings
  • Upgrading from bottled gas heating
  • Oil fired boiler replacement.

Check out the free resources below. See what an air source heat pump could do to provide hot water and heat for your home or business.

Mitsubishi Electric Air Source Heat Pumps

It has become clear from the shows that we visit and the people we meet, that there is a growing demand for credible alternative energy solutions.

It is the increasing energy bills, the need to reduce carbon emissions and the raft of positive legislation. What was needed was an alternative solution for domestic heating and hot water.



Heating and hot water costs are approximately 6% of an average monthly salary. With heating and hot water accounts for almost three-quarters of the total energy consumed within a household.

We found the solution for our customers with Mitsubishi Electric. They have used their expertise and pivotal industrial technology. In doing so, they have created the Ecodan range. A family of air source heat pumps ideally suited to the domestic and light industrial applications.

Ambient air can heat your home

The temperatures required for domestic heating and hot water are relatively low; the air source heat pump is a perfect solution. The system uses free renewable energy from the outside air and upgrades it for use in air source heat pumpthe home. The diagram opposite shows how the fan unit that is installed outside your house draws ambient energy across a heat exchanger.

This heat energy is used to boil a refrigerant gas. This is compressed, raising the temperature significantly. It then passes through another heat exchanger to your domestic heating and hot water system.

A refrigerator in reverse

Your heating and hot water system take this energy through another heat exchanger. The operation of a heat pump is similar to a fridge but in reverse.

The significant part is that for every 1 kW of electrical energy input, the air source heat pump will generate an average of at least 2.5-3.5kW of heat. The coefficient of Performance (COP) of at least 2.5:1.

If this all sounds like creating energy for nothing, yes, it looks like magic but fully explainable within the bounds of physics and thermodynamics. If you want to explore the maths of heat pumps check out,  “do the math”. He even does an experiment in his fridge to test its efficiency as a heat pump. Warning lots of formulas…


Energy for nothing?

The net result is because we input less energy than we get out there is an energy gain of between 2.5 and 3.5 time the input.  The efficiency of the system is dependent on the temperature difference between the inside and outside of the house.  Over the year it averages out to a relative gain of 3 to 1.

What does that mean

The heat pump uses electricity, for every kilowatt used you get 3 back, so you can divide the unit cost of your electricity by 3.  The average UK electricity price is 13p/kWh so using a heat pump reduces your Kilowatt price down to 4.33p/kWh  That is competitive with bottled gas and heating oil.

A technology that works

Whatever the weather is doing ambient energy is extracted from the air, even when the temperature is very low, typically the systems are designed to operate at an outside temperature as low as  -7 degrees and still achieve an internal heat of 16-21 degrees.

In reality, the Uk external temperature is relatively narrow. While we get our very cold and hot days, the average low is 12 deg and the average high temperature is 26 deg. This makes our climate ideal for heat pump technology and well within the bounds of operating efficiency.

Is this technology for you?

Heat pumps are best suited to new build situations. Modern building requires a lower heat input to maintain a good ambient temperature. The older building often have less insulation and more ventilation ( in some cases drafts ) requiring a higher level of heat input.

That said a heat pump can be a more cost-effective heating solution when considering a rural location where the only alternatives are bottled gas or heating oil. Remember a heat pump is collecting and concentrating energy from the air. So it reduces the cost of the electricity it takes to run, by a factor of 3.  There may be additional savings to be found by using off-peak electricity.

Further savings though mixed renewables

If you have the option to add an additional renewable energy supply, like solar panels or a wind turbine the input cost are significantly reduced. By using this free energy to power the heat pump which in turn extracts more free energy from the air.

Every project is unique

At GMRL we look at every situation from the perspective of your immediate needs and future opportunity. A staged introduction of renewable solutions provides long-term energy security and reduced cost over the lifetime of the project.

The bottom line is every project is different and we only specify the best solution for your situation. We have a range of brochures and free resources, however, it is to best get to in touch, so we can send what is most suited to your needs.

Do you have a project get it touch