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Hi, we have a house with underfloor heating system on 3 floors. Basically pipes running under the floor that are circulated with hot water from the central boiler. The house is about 22 years old. The system works great, and the house (and floor) are always toasty warm.
Question: does anyone know what kind of maintenance this system needs, besides topping up the water now and then? What about calcium buildup? Does the system need to be flushed out periodically, and if so what does that cost? Anyone have experience in this matter? There's nothing wrong with it now, but I am thinking about preventative measures.
Anyone with experience in this? Thanks for any feedback.
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I recall that when we replaced our boiler (et al.) a few years ago they drained and refilled the underfloor system, as well as all the radiators etc. At that time we were strongly recommended to have the heating circuits seperated from the actual heated water by a heat exchanger, to ensure that the water therein was not continually re-oxygenated. I think they also put some sort of additives in it. Both measures taken to ensure minimum corrosion or sludge/scale buildup.
But the system had, at that time, been operating for >25 years, with no suggestion that it had been subject to any periodic maintenance beyond a normal annual service of the boiler (we had receipts going back at least ten years when we moved in), so I think the answer is that you shouldn't worry about it. If you have an annual service contract, ask them about it next time they come. (If you don't, I suggest you do, IYSWIM