UFH to help cooling?

[richo106]

Hi All

 

I have an ASHP, buffer tank,UFH upstairs and downstairs with a manifold for each floor and thermostat for each room.

 

With the few day heat wave we have coming I have always wondered that if I could pump cold water around my UFH it may help with cooling? Has anyone does this and does it work? I’m not expecting it to do loads just help with a degree or 2.

 

if possible what would be the best way with my set up? 
 

any advice/info welcome

 

Many Thanks 

[Nickfromwales]

8 minutes ago, richo106 said:

Hi All

 

I have an ASHP, buffer tank,UFH upstairs and downstairs with a manifold for each floor and thermostat for each room.

 

With the few day heat wave we have coming I have always wondered that if I could pump cold water around my UFH it may help with cooling? Has anyone does this and does it work? I’m not expecting it to do loads just help with a degree or 2.

 

if possible what would be the best way with my set up? 
 

any advice/info welcome

 

Many Thanks 

You may do well to read the hundreds of threads on here that answer this question, and all those to follow   

 

Have a quick search, you'll soon be up to your eyes in info for this subject. 

[JohnMo]

14 minutes ago, richo106 said:

With the few day heat wave we have coming I have always wondered that if I could pump cold water around my UFH it may help with cooling?

If your heat pump does cooling - not all do.

 

But how are you going to control it? Do your thermostats do cooling?

 

Would set flow temp to 14.5 to 16, fixed flow temp, you want the heat pump to run long cycles. I would have all loops open, so if your thermostats do not do cooling, you will need to fool the system by winding the thermostats to max setting a few hours before you expect to get hot. Do not be tempted to go below 14.5 otherwise you are likely to condensation issues.

 

16 minutes ago, richo106 said:

ASHP, buffer tank,UFH upstairs and downstairs with a manifold for each floor and thermostat for each room

Would be looking to simplify that.

[richo106]

Hi @JohnMo

 

My ASHP model is panosonic WH-MXC12J6E5 and does not support cooling, I have just checked this on the controller and the lowest temp it can be set to is 20 deg

 

I am guessing this is now a no go then

 

Cheers 

[JohnMo]

It does do cooling, but have to switch between heating and cooling modes. If you are going down to 20 you are in heating mode. 

[Conor]

In terms of operating, I set mine to a fixed flow temp (13c as our dew point is normally around 10c) and let it run 24x7 with all zones open (expect basement)during the heat wave. it works well. But, I'm in NI and "hot" for us is about 25c. We don't even see 30c here. Yet.....

[richo106]

It does reference cooling, but for the life of me I can’t find anything in the controller/set up to enable cooling