Hi,
I am seeking a bit of guidance please. We have moved into a property that requires renovating.
We had a new combi boiler installed last year and now we are looking to replace most of our downstairs radiators with underfloor heating.
When I say most, there are 2 in our utility room that now would be difficult to replace with underfloor heating as the room is finished - so we need to keep them :-/.
Downstairs is open plan so we have no requirement for separate zones.
The area is approx 5650mmx9950mm and will be half concrete and half timber floor. The joints are at 400mm so all underfloor pipework will be at 200 centres.
So what would I like to know?
Ultimately we just want to have one programmer/stat (we currently have a CM927 wireless). To increase the temperature at the moment we just increase it on the CM927, we don't want to have to do it on more stats if possible? Ideally we would like the underfloor heating to act as if it were a radiator with a TRV but guess this isn't possible because the pump needs to know when to run.
We have TRVs on all the upstairs and 2 downstairs radiators.
Because of the 2 radiators downstairs I assume I need to run another flow and return from the boiler, so theres a zone valve on the radiator flow and a zone valve on the UFH flow? Does this new flow and return need to be 22mm.
What is the maximum zone size, am I able to achieve 55m^2 in one run which maintains a constant heat, or will I get a cold spot towards the end of the run?
Is there any systems anyone is able to recommend for this?
Please see attached drawing. I forgot to note that the left third of the house is a ground floor extension. The floor is uneven, hence the reason it's being concrete filled, the original house has a timber floor which is in good order.
Many thanks for reading.
Chris.
View media item 70740
I am seeking a bit of guidance please. We have moved into a property that requires renovating.
We had a new combi boiler installed last year and now we are looking to replace most of our downstairs radiators with underfloor heating.
When I say most, there are 2 in our utility room that now would be difficult to replace with underfloor heating as the room is finished - so we need to keep them :-/.
Downstairs is open plan so we have no requirement for separate zones.
The area is approx 5650mmx9950mm and will be half concrete and half timber floor. The joints are at 400mm so all underfloor pipework will be at 200 centres.
So what would I like to know?
Ultimately we just want to have one programmer/stat (we currently have a CM927 wireless). To increase the temperature at the moment we just increase it on the CM927, we don't want to have to do it on more stats if possible? Ideally we would like the underfloor heating to act as if it were a radiator with a TRV but guess this isn't possible because the pump needs to know when to run.
We have TRVs on all the upstairs and 2 downstairs radiators.
Because of the 2 radiators downstairs I assume I need to run another flow and return from the boiler, so theres a zone valve on the radiator flow and a zone valve on the UFH flow? Does this new flow and return need to be 22mm.
What is the maximum zone size, am I able to achieve 55m^2 in one run which maintains a constant heat, or will I get a cold spot towards the end of the run?
Is there any systems anyone is able to recommend for this?
Please see attached drawing. I forgot to note that the left third of the house is a ground floor extension. The floor is uneven, hence the reason it's being concrete filled, the original house has a timber floor which is in good order.
Many thanks for reading.
Chris.
View media item 70740