Your guide to Boiler Plus 

On April 6 2018, changes to technical standards under Building Regulations Approved Document L1b (also known as Boiler Plus) came into effect and apply installations in existing buildings in England only.

The main changes are:

  1. Seasonal space heating efficiency of the new boiler no less than ErP 92%
  2. Time and temperature control required for all installations
  3. All combi installations must also include one of the following:
  • Weather compensation
  • Load compensation
  • Flue Gas Heat Recovery
  • Smart control with automation and optimisation

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In 2005 Approved Document L of the Building Regulations changed to require the installation of condensing boilers. Since then, there has been very little in the way of changes to minimum standards for heating installations.

In September 2015 the EcoDesign of Energy Related Products Directive (ErP) was introduced, which takes a more holistic view of heating system efficiency by recognising the impact of controls on the overall "package” of installed components.

The Department for Business, Energy and Industrial Strategy (BEIS) launched a consultation document in December 2016, and the subsequent policy changes concerning minimum requirements when installing boilers in existing buildings were effective from 6 April 2018, in England only.

The changes are not only beneficial to efficiency and emissions but are also easily adopted, low cost and simple to factor into a boiler installation:

  • Getting the best deal for consumers
  • Making it easy for installers
  • Attaining measured and sustainable fuel use reduction.

The table below provides examples of compatible controls that will help you comply with Boiler Plus.

View our guide to compatible controls and accessories here.

Frequently Asked Questions

  • What will happen if I don't comply?
  • What should I do if my customer doesn't want the extra measures?
  • Why are boilers rated differently for SEDBUK, SAP and ErP?
  • What support or training can you offer?
  • What is FGHR?
  • What is weather compensation?
  • What is load compensation?
  • Does uSense comply with Boiler Plus?
  • Where can I find more information?
  • When fitting a Plume Displacement Kit to a boiler, can I still install an IFOS?

Under ErP, the efficiency of the overall system comes in with package labelling. There are only two combinations that would lead to a requirement for a package label; one is a heat source, such as a boiler, CHP unit or a heatpump, with external control, be that a room thermostat through to a multi zone controller. The other instance that requires a package label is where there is a heat source in combination with a solar thermal system. This requires the addition into the package label of the solar thermal collectors and the solar cylinder itself.

There are a number of ways the package ErP label can be produced; a lot of manufacturers - Baxi included - have a web-based tool so they can input the various values of the equipment they're installing. From those values, a label will be generated, so essentially all the calculations will be done by the calculator tool.

If you're dealing with an existing system, for example if you're going to do a boiler swap or replace some controls, when you're looking at ErP in terms of package label, you don't need to take into account any existing stuff within the property into that calculation. It's only appliances and controls that are being newly installed at the same time.

The actual calculation is actually quite simple - especially if the installer uses our calculation tool. It should take no more than 5 - 10 minutes to fill in the calculator and populate the label.

You can get products from a number of different manufacturers to combine into a single package. Whoever creates the package will then take on the responsibility for creating the package label.

The authority who will be policing the new regulations is a government department called the National Measurement Office (NMO).

In terms of having to buy additional equipment: no. There is just the additional time it takes to complete the label and paperwork.

When dealing with labelling and ErP on top of an existing installation, for example a combi boilers plus some controls, it's literally a 5 minute job. Calculate the package label, tick the right box on the package label, hand it to the end-user and away you go.

You can find the updated Domestic Building Services Compliance Guide here

An IFOS can be fitted to a boiler when installed with a Plume Displacement Kit.

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