Is a heat pump sized in the same way as a fossil fuel boiler?
There is a lot of confusion about heat pump sizing, especially in relation to existing gas or oil boilers. Graham Hendra explains whether heat pumps should be sized on the...
How can the efficiency of a heat pump exceed 100 percent?
It’s difficult to understand how a heat pump can have an efficiency of over 100%. Graham Hendra explains how heat pumps are able to achieve these efficiencies....
What are the risks of oversizing a heat pump?
We know that if a heat pump is undersized, this may mean that it will struggle to heat your property, but what are the risks if a heat pump is...
What is the difference between an EPC certificate and a heat loss calculation?
Graham Hendra explains what the difference is between an EPC certificate and a heat loss calculation....
How does a heat loss calculation help you calculate the size of a heat pump?
Once you’ve had your heat loss calculation completed, how do you decide on the size of heat pump that you will need to adequately heat your property? Graham Hendra explains....
The Graham Hendra Awards
By now, if you’re a regular reader of my posts, you will know I’m a bit of an egomaniac so it won’t surprise you that I thought I would hold...
Heat pumps for apartment blocks and whiskey distilleries
We sat down and had a fascinating chat that was full of insights with Dave Pearson, Group Sustainable Development Director at Star Refrigeration. Dave tells us about how heat pumps...
Why are heat pumps better suited to well insulated properties?
We often hear the phrase “fabric first” – Graham Hendra reveals whether heat pumps are better suited to well insulated buildings....
Can a heat pump heat domestic water?
A common question from homeowners looking to switch to an air source heat pump is whether the units can heat domestic hot water for showers, baths and general washing up....
Homeowner’s experience with a Daikin HT air source heat pump
Julian Clarke, a sustainable homeowner in the UK with a solar PV array and two electric cars, explains why he installed an air source heat pump to replace his oil...