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Underfloor Heating: Best Practices?
Hello :beer:
I have had underfloor heating since 2009. But no one seems convinced of the best method on how to heat a home using this system.
What do you do and why?
- I'd be interested to know what temperature/hours you have set.
Thank you.
I have had underfloor heating since 2009. But no one seems convinced of the best method on how to heat a home using this system.
What do you do and why?
- I'd be interested to know what temperature/hours you have set.
Thank you.
0
Comments
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What sort of underfloor heating. Hot water or electric.
Is it embedded in concrete. If it's electric are you on an E7/E10 or complex metering tariff.
If it's hot water, what feeds it, gas boiler, oil boiler. what's your flow temperature?
How is it controlled - timer, programmer, thermostat etc. If hot water do you have manifolds to distribute the water to differnt areas?
I've got an overlay hot water u/f system fed by an air source heat pump which runs virtually continuously at this time of the year. The flow temperature varies between 30- 40 degrees, depending on the outside temperature and the house is split into separate zones, each controlled by a programmable thermostat which varies the required temperature at different times of the day.
We do not shut the heating off but turn it down by 2-3 degrees overnight or in rooms that aren't in use during the day (bedrooms & bathroom) otherwise the place can get too cold and it takes a long time to reheat.
As it's an overlay system, it's a bit more responsive than a system where the pipes are actually embedded in the floor screed but still quite slow to react.Never under estimate the power of stupid people in large numbers0 -
Compared to conventional central heating, UFH is generally used at low heat for a long period; which is why it is so suited for use with a heat pump.0
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I wrote a bit about this in another post, but roughly my setup is:
District central heating and wet underfloor divided in 3 zones each with their own thermostat.
The pipes are laid out in concrete and the pump mix temperature is set to 45°. Pump is running at level 2 velocity. There are 3 levels.
I usually have it set to turn on the living room which is where I do most of my life at 16:00 and turn off at 22:00 weekdays. Weekends turn on at 7am turn off at 22:00. Target temperature at 21°, the thermostat will call for heat when dropping half degree from the target (so at 20.5° in this case).
It usually takes to heat the living room from ~20.5° to 21°, about 3 hours.
The heat inertia means after reaching the target temperature of 21°, it still will rise till ~21.6°, meaning in the same day it will not need to call for heat again.
But the heat loses when cold and not sunny outside are about 1° after 24h which means almost for sure the next day the heating will turn on again to get back to the target 21° unless sunny and not too cold outside, then it might "jump" a day although that means the living room could drop under 20° and then the next day it will take longer to reach the target.
Bedroom don't usually need to heat as I like it a bit colder and it is usually around 19°-20° at night. Very rarely under 19°.
I'm quite new to underfloor heating being this my first winter with it and not sure if I'm doing it wrong. Any recommendations are appreciated.0
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