Rainwater Harvesting Systems in Commercial and Public Buildings

Rainwater harvesting systems are increasingly being incorporated in multiple occupancy commercial and public-sector developments such as office buildings and school or hospital extensions.

Use of rainwater harvesting systems in such applications is not only good for the environment, but additionally makes excellent financial sense.

Such buildings frequently have large roof areas which of themselves present storm-water management issues; collecting this roof water for re-use helps to alleviate this problem.
Conversely, buildings with multiple occupancy have a high, and potentially expensive, demand for toilet flushing water; using harvested rainwater for this purpose therefore makes excellent financial sense and can provide, alongside Enhanced Capital Allowance considerations, very short investment pay-back periods.

Distribution centres, too, with their requirement for fleet vehicle washing are an excellent example of the cost-effective application of rainwater harvesting. In short, any building with a large roof and a high-demand for non-potable water can at one and the same time use rainwater harvesting to help solve environmental storm-water management issues - and make very substantial savings on the use of mains water.

System Specification, Supply & Support

Freerain provides developers of commercial and public buildings with expert system specification services that will ensure the most cost-effective rainwater harvesting system is bespoke designed for their project. System supply arrangements are equally efficient, with an experienced Freerain technical engineer available to provide installation support where needed. All commercial systems enjoy the benefit of the full Freerain warranty and after-sales support services.

Typical systems

Please click on the images below to enlarge

Tanks.

For smaller systems we have a range of high strength ribbed polyethylene tanks from our domestic range.
For projects requiring tanks between 6,000 Litres and above we can supply GRP tanks, similar to the picture to the top right of this page. These can be linked to create very large installations.
Above ground tanks are also available and these tend to be 6-19,000 litres in polyethylene (vertical farm tanks), but more we use sectional tanks. These are built up in 1M2 sections to the requirements of the site. These can be either internally or externally flanged.

Filters

In order to ensure the highest water quality is achieved and downstream reliability it is essential that the correct pre-tank filter(s) is integrated in to the rainwater harvesting system. In our range we can supply filters suitable for roof areas of up to 5000 M2 and greater. Secondary filtration is often used depending on the roof material.

Pumps & Controls

Controlling the system is essential and therefore we have customisable control systems.
A typical Duo control panel. Click to enlarge.

Optional extras, upgrades and specialist components

From our wide experience we have realised the importance of a flexible design to meet individual specifications, therefore we can offer you a number of solutions, ranging from fully "potable" drinking systems to pumped overflow and surface water management solutions.

Monitoring panels

We provide montioring solutions bespoke to your project, they are popular with Schools, hospitals and other public buildings.

Let our technical department specify for you.

Please contact Freerain with you project details and we will be happy to discuss your options with you.

We are also seeing an increasing number of clients requiring help with BREEAM and the Code for Sustainable Homes calculations. Of course we are more than happy to advise.

Download our brochure here