micheal300

Yes, hardwood sliding sashes I’m checking out the possibility of replacing the glazing for higher performance glazing

Totally, I’m very grateful for all the feedback so far. Really helpful ?

I figure from Jan through to April it was burning about 40 kWhr per day. It wasn’t required through the summer months. The flow leaving the heat pump is 37 degrees I believe. There is no mixing valve at the manifold and the temperature is in and around the 37 degree mark also.

It’s relatively new at 15 years

That's what I'm wondering - is 24c optimal? The walls are quite deep and well insulated so I can only assume heat might be getting lost through the windows? It's my theory currently.

Can't discern any great difference between timber/carpet and tile/stone. There is one bedroom with carpet that seems to do reasonably well - i figured it was because it has only one window whereas the other rooms have more glazing. Could area of glazing have a big impact? All the circuits seem to run about the 35/37 mark.

It's a mixed bag through the house - timber, carpet, tile and stone flag

I would say max 20-30% maybe at a rough guess The insulation under-slab is one that I have no way of confirming unfortunately

Afternoon all, Hopefully you can help me with an UFH problem that has been bugging me for some time now (2 years to be precise). My wife and I bought a beautiful house in summer of 2019, but we didn't really move in until Summer 2020. It's about 3000 sqft, 4 bed, well insulated, good energy rating, sash windows with 4-8-4 double glazing and is heated by a Ground Source Heat Pump (Ochsner 5kW with buffer tank) and underfloor heating (downstairs) and radiators (upstairs). However, we've never felt that satisfied with the performance of the UFH - the heating via rads upstairs works quite fine and makes for comfortable rooms. The root problem is that we don't feel that the UFH is capable of heating the downstairs room above 17/18/19 degrees - especially in winter. We have no idea why - originally we thought it was how we operated the system but have ruled that out, then we looked at the heatpump - got that serviced and it's perfect, we also got the manifold upgraded - all good there also. We feel the heating is working as it feels warmer under rugs, sofas, etc but just doesn't seem to get the room warm. Some observations and anecdotes: The flow temperature is 35-37 degrees and the floor heats to about 23/24 degrees We understand the underfloor heating pipes are in the concrete slab and tied to the re-bar (not sure whether this has any bearing) We'd really appreciate any guidance on identifying the root of the issue. As you'll all appreciate it's so frustrating to be investing so many kWHrs with so little return. Many thanks