mikeguitar

My house is a largish detached property, the central heating wa

installed 30 years ago with all downstairs pipework in the cemen floor screed. each radiator has a half inch copper feed pipe, I have had a new boile installed and am not completely satisfied with the rad heat output o the rads furthest from the boiler. I was thinking of piping surface 2 mm pipe and then reducing to 15 mm near the rads. ( Ive persuaded th wife this is the best option. This would mean some longish runs of pip but at least most of it would be in 22mm. Anyone comment on thi

-- mike guitar

Reply to
mike guitar
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Yup, are you satisfied that the rads are properly balanced? Check the uk.d-i-y FAQs website - there are from memory a couple of articles about rad balancing, invest in an IR thermometer, and check them out. You could save yourself a great deal of time, effort and money, and impress 'Er Indoors with your frugality......

Reply to
Wanderer

cheers wanderer Ill investigate, nothing does it for er indoors th

-- mike guitar

Reply to
mike guitar

A good question! If you use a larger pipe there will be more surface area in contact with the absorbing ground/screed. Depending on how/where the piping is installed you may be able to use some of the heat dispersed into the substrate.

Reply to
Frank Erskine

cheers Frank , actually I was considering putting the pipes on th surface of the rooms behind cupbards etc, I can divert pipes behin kitchen cupboards, thru walls et

-- mike guitar

Reply to
mike guitar

One poster has suggested balancing ... good idea, I wrote a large article for the FAQ many years ago ... not sure if it is still used. Make sure you take car of setting correct pump speed as well.

If it were me I would heat up system, drain it refill with a desludger/system flush additive (any plumbers merchants) run it till hot drain, flush again. Then add fernox ... and fill, bleed fully then carry out the balancing.

Rick

Reply to
Rick Hughes

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