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The Right Balance Between Approved Document F and L


The Right Balance Between Approved Document F and L

By EnviroVent Oct 27, 2010

As the new changes to Approved Document L (Conservation of Fuel & Power) come into effect in April, you may be wondering how they will effect ventilation when it comes to new build?

The changes are a step in the right direction towards the Government’s ambitious target to reduce the nation’s carbon emissions by 80% for 2050, with the latest revisions seeing a further 6% reduction to the Target Emission Rate (TER) for each dwelling, however, this has not been reflected proportionally in Approved Document Part F for Ventilation. It is important that we strike the right balance between energy efficiency and ventilation, if we increase the air tightness, we should also increase the airflow to compensate for this.

If you think about it, by increasing the energy efficiency in the homes we build, we are effectively ‘sealing them up’ in order to achieve our goal of saving energy and cutting our carbon footprint. By doing this we are prohibiting the natural flow of air within the home.

Adding to this, in a typical household of 4, each person creates moisture on a daily basis through routine activities (breathing, bathing, washing, cooking etc) – equating to approximately 4 pints of moisture per day! Over a week we’re looking at 100 pints plus of water vapour, a whopping great amount of moisture which has to go somewhere or it will just linger in the home and leave it vulnerable to condensation and mould. What’s more, we could be leaving ourselves wide open here with a situation where homes are poorly ventilated and run the risk of becoming health hazards.

It’s certainly a cause for concern and it highlights just how vital ventilation is within the build mix. Condensation dampness is already becoming a growing problem, especially within dwellings which have been refurbished with energy saving materials such as double glazing and cavity wall insulation, becoming energy efficient means we need to ensure that we ventilate correctly so that the property can breathe.

A bespoke service solution

EnviroVent are on hand to help, with over 27 years experience in solving the nation’s condensation and mould problems, no matter if they are large or small, we can help you with your new build projects. Our dedicated projects team provide the following service solution:

  • Design
  • Technical Support
  • Quotations
  • Installations
  • Specifications
  • Training
  • Commissioning

This service solution is particularly handy as it allows you to choose to utilise the whole service or just parts of it - you can utilise EnviroVent's services as much or as little as is required. In addition, we have a wide range of energy efficient mechanical ventilations systems available for project design, independently tested by BRE and SAP Appendix Q Eligible including heat recovery systems and mechanical extract ventilation.