Purchase your copy of BS as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available. Power Flushing for central heating systems Compliance with Building Regulations Part L (BS ). Products. CalFlush Power Flushing Unit. by a new boiler. Many boiler manufacturers now make the warranty dependent on flushing and cleaning in accordance with BS, Benchmark and Part L.

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Many manufacturers will void your warranty if this hasn’t been done. All heating systems suffer from corrosion over time and often some scale build up.

The importance of flushing – Heating and Ventilating

If you slap a new boiler onto an old system potentially these contaminants can bs7953 up returning to the flusihng and blocking the heat exchanger. Back in the old days this wasn’t a problem as the heat exchangers had large passes through them so the sediment etc just flushed through. Nowadays all systems use tiny heat exchangers with passes of less than 3mm wide which can easily be blocked. When it comes to the radiators, if they are full of sediment their performance really suffers.


Customers being ripped off – Power flushing.

It is for this reason that the Building Regulations for England and Wales, Part Lnow require a central heating system to be cleaned and inhibited chemically whenever the boiler is changed or any major works are carried out to the system. There is even a standard laying out how this flushing should be done, BS Now to do this procedure properly takes a little time usually about a day for a 4-bed house.

To put this into context a very experienced commissioning bs759 for VRV and chillers will charge about the flishing day rate. The best bit is, you don’t need to be gas safe registered or a qualified refrigeration engineer, in fact you don’t need any qualifications at all. There is no recognized procedure or certification, so you can pretend to be the man who can and give a certificate at the end to prove it.

Any one with a computer can set this up. I’m beginning to think I should pack this in and become a power flusher.


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