August 10th, 2019
SAP 10 – Changes to Heating Patterns
In our last Technical Bulletin, we described the changes to the hot water calculations for SAP 10. In this issue, we will be taking a closer look at the changes to the heating…
Energy & Sustainability.
May 17th, 2019
Going off the Gas Grid
The Committee on Climate Change recently issued a report describing why the UK housing stock is not fit for purpose and recommended possible changes to improve the efficiency of housing stock and reduce our carbon…
November 10th, 2018
New Standards for Domestic Boiler Installations – April 2018
Lisa Blake looks at the Boiler Plus regulations that were introduced in April 2018, and how they affect boiler installations as well as the technologies promoted by Boiler Plus and the difference between…
February 18th, 2018
LPG and the Effects on Ratings
Why is the SAP rating so low when entering LPG? LPG (bulk and bottled) is much more expensive than mains gas, this has a dramatic effect on the SAP rating. The table below…
February 17th, 2018
Home’s Heat Demand (kWh Year) for Heat Pumps
The Space Heating kWh per year figure in the “your home’s heat demand” section of the EPC gives different results for SAP default heat pumps and heat pumps selected from the product characteristics…
February 16th, 2018
FGHRS – FLUE Gas Heat Recovery System
A FGHRS is a system for recovering heat from flue gases that would otherwise be wasted. They are only applicable to mains gas, LPG and oil condensing boilers and must be selected from…
February 11th, 2018
CPSU and Thermal Stores
A CPSU or Combined Primary Storage Unit is a boiler with an integral thermal store. The thermal store must be greater that 70 litres, otherwise the system is simply a ‘storage combi’ and…
February 10th, 2018
RdSAP – A Potted History (1)
SAP was introduced for the first time in 1995, as the basis of a new approach to Building Regulations for new homes. It was subsequently updated in 1998, 2001, 2005, 2009 and 2012…
February 10th, 2018
Primary Energy Use vs Heat Demand in the Home
Question: Why does the current primary energy use multiplied by the total floor area not match the energy used in the home’s heat demand? Answer: the home’s heat demand, i.e. the space heating demand of…