Boiler Plus ErP legislation: an overview

Tuesday 3rd April 2018, 16:29

The new Boiler Plus changes, affecting installation of domestic boilers, come into force across England on 6th April.

At F & P, we have the widest range of compliant boilers available to order via our website or branch network. Please see an overview of the changes below.

What is Boiler Plus? The name given to changes made by the Department for Business, Energy and Industrial Strategy to Part L of the Building Regulations, governing minimum requirements when installing domestic boilers in existing buildings.

When does it come into effect? 6th April 2018.

Where is it being implemented? The new legislation will be effective in England only.

Who will be affected? Homeowners, installers, manufacturers and merchants will all need to be aware of the changes in order to comply with new installation guidelines.

Why is it being implemented? To help improve efficiency and reduce carbon emissions. It is part of the government’s Clean Growth Strategy, which aims to combat climate change and provide UK homes with lower energy bills and increased comfort.

What are the key changes?

  • Gas boiler performance: space heating efficiency of the new boiler no less than ErP 92%
  • Controls minimum: time and temperature control required for all gas and oil boiler installations
  • Combi boiler installations must also include one of the following: Weather compensation; Load compensation; Flue Gas Heat Recovery; Smart control


What does this mean for builders’ merchants? Merchants can help to ensure that their customers are aware of legislation changes by passing on information as needed – and referring customers to the Boiler Guide overview where needed.

How can I find more information? You can find the updated Domestic Building Services Compliance Guide here.

Installers’ FAQ – as provided by Baxi:

Q         What will happen if I don’t comply?

A          Installers who don't comply are breaching the Building Regulations and are therefore breaking the law and could face prosecution. This is policed by Building Control, although Gas Safe Register can refer incidents of safety concern to the HSE. Furthermore, if an installer were to invoice a consumer for non-compliant work, it may be considered fraudulent and therefore open to action from Trading Standards.


Q         What should I do if my customer doesn’t want the extra controls?

A          The householder is also required to comply with the Building Regulations. Having non-compliant work carried out may result in prosecution and penalties up to £5,000 for the homeowner.


Q         What is FGHR?

A          Flue Gas Heat Recovery (FGHR) is an energy efficient device that recycles the heat from the flue gases which would normally be expelled into the atmosphere and uses it to preheat domestic hot water.


Q         What is weather compensation?

A          Weather compensation is a device that communicates between the boiler and an outside temperature sensor.  It tells the boiler to alter the flow temperature in relation to the weather outside, leading to fuel saving and a consistent environment.


Q         What is load compensation?

A          Load compensation works by measuring the response of the heating system and controlling the flow temperature depending on the required load. When the boiler first fires, the increase in the return temperature is measured, giving an indication of the required load, and the boiler varies the flow temperature accordingly. The changes in the return temperature are then monitored and the flow temperature adjusted accordingly. This can reduce fuel consumption.


Summary graphic as supplied by Baxi