Water Efficiency Calculations
Keeping your water usage low and our environment healthy

Get started with us today

What are Water Efficiency calculations?

Part G of the UK Building Regulations states that all new dwellings (both new build and newly converted) must achieve a projected water consumption of no more than 110 or 125 litres per person, per day (depending on your location).

Factors that will influence the projected water consumption include:

  • The flow rate of basin/kitchen taps
  • The flow rate of showers
  • The capacity of baths
  • The consumption of dishwashers and washing machines
  • The flushing capacity of toilets
  • The efficiency of water softeners, rainwater or greywater harvesting systems

When are Water Efficiency calculations needed?

Ideally these calculations should be carried out before you have purchased your proposed fittings so that your assessor can confirm whether these will meet Building Regulations compliance.

Don’t worry if you are already past this stage however, as there are other minor upgrades and attachments that can allow you to still meet the necessary rates.

How can Productivv help?

At Productivv our team of qualified assessors are able to carry out your required calculations within 3 working days (with a fast-track service available for even more urgent projects!) with clear and concise reports produced so that both you and your Building Control have the information you need, when you need it.

Our reports include:

  • A Notice of Water Efficiency (as required by Part G 37(1)
  • A summary of installed fittings
  • Separate design and as built reports detailing required/confirmed water usage rates

For more information, please call us on 0333 339 2322 or use our handy contact form to send us an email.

Stroma CertifiedElmhurst Energy ApprovedHome Quality MarkHome Quality MarkHome Quality Mark
Get a free quote now.

We can provide you with a free, no obligation quote for all your compliance needs

Get your quote now
Got a question?

Not sure what you need or looking for some advice? Ask a question and we'll get back to you.

Ask today