Thanks again for the reply its very helpful and apologies if my past replies were not clear.
So if i havent been clear enough :) -> the heat requirements for the house are 12.16570984 Kw. - This is what's needed at T50
So as an example, my office needs 2994BTU at T50, and the radiator outputs...
Please remember i'm not a heating engineer so not all of this makes total sense at the moment
so 158sqm * the energy loss (134.14watt) based on chat gpt which isnt 100% acurate but will be aroundabout, /100 is what you said above
Confusion here is this; my calcs to get the heating requirement...
Ah i see
Well i based the heat demand on BTU. I sized the rads at T30 based on the BTU needed for each room, which converted to kw.. see table below :)
Name
KW dt50
KW dt30
dt50 BTU output
dt30 BTU output
Required BTU
Total BTU
FLOMASTA TYPE 22 DOUBLE-PANEL DOUBLE CONVECTOR RADIATOR 600 X...
I think 50 degrees on the boiler should be more than adequate, it's set to 50 at the moment and within an hour the house is WARM
Also means as temps drop it has a bit more umph, 45 might be a bit on the low end.
It can get to a stale 7 degrees ish here in the UK in the house if* we dont use...
nope, afaik no WC, although that would be great. The setting (6) is Min. outside temperature of the heat curve which is -7, suspect that this is then related to WC
Yep, i added 10% BTU to them as well for wiggleroom at T50.. actual heat demand at -5, not sure ho to calculate this
I used chat...
We can get lower than -5 but i think generally where I live anyway (Midlands) it gets on cold months about -3. I think the default curve on the boiler is also set to -7 but would need to read up on that
Yep, they're rather large.. Mostly T22 and5/6 T21.
Appears i can get them down to T20...
Thanks very much i think this makes sense to me now
The boiler should do 24kw, so 17.2LPM and that should mean that i can run down to 44 on the flow temp, return of 38 - 17.15LPM.. but i think from a "beat the crap out of the pump" perspective, it would be better at 45 degrees with T20 and flow...
Name
KW dt50
KW dt30
FLOMASTA TYPE 22 DOUBLE-PANEL DOUBLE CONVECTOR RADIATOR 600 X 600MM WHITE
1.025207
0.52778
FLOMASTA TYPE 22 DOUBLE-PANEL DOUBLE CONVECTOR RADIATOR 600 X 1200MM WHITE
2.050414
1.05555
FLOMASTA TYPE 22 DOUBLE-PANEL DOUBLE CONVECTOR RADIATOR 600 X 1200MM WHITE
2.050414...
So this is an accurate reflection of the current setup, i'm trying to get that extra 4 degrees out of the DT
One thing not on the sheet that i need to know is the pump speed for the CH (c) and Modulating Pump (c.)
I guess i can add an extra couple of columns in and play with the formulas...
Ah ok this is great to know thank you :) - yes i sized them based on T50 rads
I have well insulated the house, we have a new extension on the back and the rest i have battened out the walls and applied 50mm phenolic board so it gets nice an toasty.
The settings i have on the boiler at the...
Great reply thank you!
Apologies about my beginner level understanding, i am learning still :)
I see.. then i may have oversized the radiators a bit too much? I calculated the radiator size by finding the BTU needed for the room based on the BTU output of the rads at Delta T50°C.
So...
Thanks to all for your replies it is appreciated
Mine are mildly warm at the top and almost stone cold at the bottom, but after about 20 minutes they get mildly warm at the bottom and warm at the top, never hot all over
Sorry not sure, i dont think so..
The boiler has 2 options on c and c. -...