Thermostativc valves

In message , nigelb writes

The system still needs to be balanced, otherwise you could have a situation whereby not enough water goes through some rads to heat up the rooms, even though the rad is big enough

nigelb wrote in news: snipped-for-privacy@diybanter.com:

Yes, balance all the rads with TRV's fully high, then set TRVs

mike

Still needs balancing.

david

Why? If the system is capable of supplying the heat demanded by the occupants of the house then eventually all rooms wil be at the desired temperature and all TRVs will be closed some of the time (maybe not all at the same time).

The house may not heat up evenly which may be good enough reason to balance the system.

MBQ

Exactly. And it's not that difficult to do. Other thing is if you have an older open vented system with a header tank you're more likely to get cold rads at the end of the run or pumping over when all the TRVs close.

YOU MUST BALANCE THE SYSTEM

its all about heat transfer and efficiency.....if the water flow rapidly through your rads heat transfer is poor...too slow is poo too...when system is running at full temp remove all the trv heads an check for a temp diff of 11 degrees between the flow and return pipe of all the rads...adjust the lockshields to balance to the temp dif off 11 degree

-- gastec

Several reasons already given why you should balance the system, and all are valid. All you need now is HOW to balance it. That's why we have a FAQ entry for the balancing procedure; its at

Thanks to all who replied

Nigel

nigelb Wrote:

-- nigelb