UFH to help cooling?

[NSS]

30 minutes ago, JohnMo said:

Aren't you better to run the MVHR at the normal speed. Then the MVHR actively pulls the humidity out the house, moving dew point upwards.

Possibly, but it's a case of six or two threes. Temp at 8pm yesterday when it would normally switch to night mode was still 30c, and was 27c when I went to bed at 11.30pm. I decided there was no point pulling in air that was going to need cooling.

[NSS]

3 minutes ago, jack said:

 

Generally yes, but only if humidity is lower outside than in.

Where I am, humidity is still high, and is forecast to rise through the night into the high 80s. Thankfully it should drop a fair bit through tomorrow.

 

Here too. We're only a mile from the Solent, so external humidity is generally higher.

[marshian]

Interesting topic - Heat Geek have just released a video on the subject and there was one thing that got my attention bearing in mind I am all rads (no UFH) and they are almost all converted to TBOE from a flow perspective - I will one day convert to heat pump but when the boiler dies or Gas v Electricity cost perspective drives the change.

 

Anyway here it is 
 

 

 

[richo106]

I have just been looking at mine again, with water temp of 16/17deg there is a tiny bit of moisture on the manifold downstairs - temp 25.4 and humidity 47% ( around 10% higher than normal) gives a dew point of 13.3 deg so not concerned downstairs 

 

upstairs is around 28 degs and 57% humidity so has a decent amount of condensation on the manifold as dew point 18.3 deg. Upstairs is mainly carpets except tiled bathroom but tbh the ufh is pretty ineffective upstairs so not concerned however I have just turned the manifold valves off. Unfortunately I have no way of isolating the flow and return pipes to u/s manifold but pipes are lagged in the ceiling 

 

Does anyone see any issues here?

 

I am new to using ufh/ASHP for cooling but it certainly makes a difference downstairs and a lot more humid than usual