Frequently Asked Questions
CoP – What is that and what does it mean?
CoP of stands for Coefficient of Performance
CoP describes the efficiency of a Heat pump. The number depicts the amount of energy output achieved for 1kw of energy input. The higher the CoP the more energy efficient.
Can hydronic heating run on electricity?
Hydronic heating is incredibly versatile and can run on both natural gas and electricity. For systems powered by electricity, a hydronic heat pump will be used to heat and circulate the water throughout the house
How does electric hydronic heating work?
Electric hydronic heating requires a heat pump. Heat pumps use electricity to heat the water, employing the same principles that air conditioners use to cool the air. They condense the heat out of the surrounding air and transfer it into the water. This heated water is then circulated throughout the hydronic system via a pump. Heat pumps can operate efficiently down to -25°C. They are also Solar PV and Smart Grid compatible, aiding in offsetting running costs and reducing carbon emissions.
How do Heat Pumps Work?
The way a heat pump works is very similar too, but opposite to an air conditioning condenser. Whereas an air conditioning condenser is designed to cool the air coming into the house, the heat pump draws the heat out of the surrounding air and uses it to heat the water circulating in the hydronic system.
Are Hydronic Heat Pumps powered by gas or electricity?
Hydronic Heat Pumps are 100% powered by electricity.
Are heat pumps energy efficient?
Heat pumps are very efficient in the way they operate. They use a fan to move air through the unit, condensing the heat out of the air and into the water. Unlike gas ducted heating, where the heat dissipates into the air, the hydronically heated water retains the temperature much more efficiently, taking much longer to cool down.
The advantage over the traditional gas hydronic boiler is that the heat pump uses only electricity, which can be sourced from the normal grid or from solar-generated electricity from your home PV system. This gives you the opportunity to cut running costs and offset your carbon emissions by not using gas.
How to size a Heat pump for my Hydronic Heating?
The first step for us on any hydronic job is to do a heat load calculation on the whole building. This figure takes everything into account from the construction materials, the level of insulation through to the amount of glass in every window. Once we have that figure we can then design your system.
That heat load figure will also determine the size of the Heat pump you require to heat your hydronic system effectively.
Can a heat pump be used with radiators?
Yes, it can. Please be aware that due to the lower water temperature generated by a heat pump the radiator panel sizes may need to increase in size to be able to put out the same amount of heat as a system being heated by a gas fuelled boiler.
Under floor slab heating, however, isn’t affected by this, as the water temperature flowing through slab heating is never over 50deg C as not to damage the slab itself. So, a heat pump is 100% compatible with under floor slab heating!