The tank size calculator service is provided by RainWater Harvesting so you can establish the size of tank you might decide to install. You will need to know the approximate dimensions of your house in metres. If in doubt, just pace out the house length and width.
Collectable Roof Area (m²)
|Main Building||Width:||Length:||Rain Collection Area:||0||m²|
|Extension one||Width:||Length:||Rain Collection Area:||0||m²|
|Extension Two||Width:||Length:||Rain Collection Area:||0||m²|
|Extension Three||Width:||Length:||Rain Collection Area:||0||m²|
|Or the total roof area, if you already know it:||Total area of collectable roof space:||0||m²|
|Select Your Region||Average rainfall per year in your region:||0||L|
|Collectable rainwater per annum in litres - discounted by 20% to account for water loss||0||L|
Use of rainwater in the building
|Number of people or bedrooms in the building -||people:||bedrooms:|
|Outdoor use in litres, per person per day (recommended 5 litres per person per day)||0||L|
|Amount of water you require every day||0||L|
|Amount of water you require every year||DEMAND||0||L|
|How many days drought protection do you need? Typically 21 (18 minimum)|
|Capacity of water storage in litres required for drought protection||0||L|
|The lesser of YIELD (blue) or DEMAND (green) per annum||0||L|
|Therefore, volume of rainwater storage required||0||L|
|Is there sufficient roof water available:||
Please Complete the Form
|Recommended tank size from our shallow dig range:||F-Line Range:||
[F-Line Tank Range]
|Select the carat range if you require a deep dig tank:||Carat Range:||
[Carat Tank Range]
We can do the calculation for you if you supply the information requested below.
For us to do the calculation please give us a call on 01733 405111 and provide the following information :
1) Collectable Roof Area
2) Number of bedrooms in the property
3) Your location within the country
If you wish to work out the tank size yourself please click on the link below to download the Tank Size Calculator Spreadsheet.
You're done! Congratulations.
To find the tanks suitable for your application, type the size of tank into the search box - say 2700 - and the search should bring up the tanks and systems of that tank size.
Many other companies, especially those publishing information on their websites, do us the honour of cribbing our tank size calculator. The only difference we can claim is that we keep ours up to date with the development of regulations, rainfall statistics, new tank products on the market and other aspects which might alter the calculations: