Building Regulations in England & Parts L, F and O
With the transitional period now over, the updated 2022 Building Regulations Part L, Part F, and the new Part O, became legally enforceable for all new residential projects.
This is the biggest regulatory change the construction sector has seen in the last 40 years and a stepping stone in our transition away from fossil fuel systems toward decarbonised homes and the electrification of heat - and ultimately, the Future Homes Standard. This shift will impact the way we design buildings and specify technologies.
Have you decided which technologies to specify to achieve compliance for your next residential project?
The new English Building Regulations came into law on the 15th of June 2021. For projects with existing planning permission there is one year transitional arrangements period that applies on plot-by plot basis.
The updated Part L outlines the four compliance metrics for new developments: primary energy target, carbon emissions target, fabric energy efficiency target, and minimum standards for building fabric and building services.
The ventilation system choice under the updated Part F is linked to aritightness as we look to increase indoor air quality. New Part O offers modelling to help mitigate the risk of overheating in buildings.
We designed a simple guide to the changes to Part L and Part F, and the new Part O, and discuss what they may mean for your project.
Our range of HVAC solutions aim to provide future proof technologies to building projects over various sectors.
Request our presentation on Building Regulation changes that answer the most frequently asked questions.
Latest News
Our news section cover building regulations, what the changes to Part L, F, and the new Part of O entail, and what this means for HVAC specification.

Piping Hot – preventing burst water pipes in freezing weather
Chris Stammers, product marketing director, Dimplex
With rapid freeze/thaw cycles in the weather striking the UK there is a real threat of damage to household pipework. Whether a homeowner or a landlord you should be aware of the state of pipework and the potential impact of a burst pipe.

Private ownership is key to ECO extension benefits
Homeowners and private tenants living in electrically heated homes will be amongst the biggest winners following the extension of the Government’s Energy Company Obligation (ECO) scheme, according to Dimplex.

The Dimplex HEPA Air Purifier delivers a three punch assault on airborne allergens, impurities and odours
Reduce allergens, odours and neutralise harmful impurities in the air all in one go with the Dimplex DXAPV3N HEPA Air Purifier with a genuine HEPA filter, active carbon filter & Viro³ technology.