What is the best type of compressor for a heat pump?
Graham Hendra talks about compressors and which types are best suited for heat pumps....
Questions & Answers
Are air source heat pumps noisy?
One of the biggest issues raised by homeowners is that air source heat pumps are noisy? But are they and what does Graham Hendra think?...
Why do you have a buffer vessel with a heat pump?
Do you need a buffer vessel (or buffer tank) with a heat pump. Graham Hendra shares his thoughts on this subject....
What is delta T (ΔT)?
Graham Hendra explains what the mysterious delta T (ΔT) is when it comes to heat pump systems....
What is seasonal coefficient of performance (SCOP)?
Most heat pump owners are familiar with the term coefficient of performance (COP). Graham Hendra explains the difference between COP and seasonal coefficient of performance (SCOP)....
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....
