ᐅ Hydraulic Balancing of Underfloor Heating Systems

Created on: 28 Jan 2019 19:03
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TomTom250
Hello everyone,

I have underfloor heating, but one room is not getting warm. After unscrewing the actuators for the individual room control, the situation improved slightly. However, the flow rate is still too low. Can I adjust it somehow on the transparent flow meters? It is a Pipelife underfloor heating manifold. The valves for the actuators are on the return flow and are now fully open. The glass tubes are on the supply side – this is where I would need to make adjustments (since the valves where the actuators were are fully open).

Is this possible? And if so, how? Thanks in advance to everyone who can help!
KingSong29 Jan 2019 19:17
So you didn’t receive a design calculation for your underfloor heating? And is the 7K temperature difference now affecting the problem room or the others? Which room is the problem room? Living room? Bathroom? Guest room?
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halmi
29 Jan 2019 19:23
Oh dear, a 15kW heat pump... is this for a new build?
KingSong29 Jan 2019 19:30
Yes, she wrote that the house is new... well, that alone doesn’t say much. We also have a 14 kW heat pump, but we need to heat 285 m² (3064 ft²)...
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TomTom250
29 Jan 2019 19:35
Yes, the house has 300 m² (3,229 sq ft)... The standard rooms account for 7,000 (units), but the problem room seems significantly larger... it’s a guest room of about 20 m² (215 sq ft).
KingSong30 Jan 2019 12:27
Then, as a test, try increasing the flow rate so that you achieve a proper temperature difference. Important for the temperature difference would also be the information about the supply temperature your system is operating at and how the heating curve is set. Unfortunately, with the small bits of information you’ve provided, there’s not much to go on except guesswork.......
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TomTom250
30 Jan 2019 12:49
Sorry, I’m not an expert and don’t necessarily know which information is relevant. The supply temperature is about 35°C (95°F). Unfortunately, I don’t know the heating curve.