Hello, I am seeking advice how to improve/maintain around 22 centigrade in my sun lounge. Room size is 3.5x4.5x3m high. 3 external walls brick cavity insulated. Double glazed glass area is approx 8sq metres. 30 degree lean to concrete tile roof with 100mm insulation board. Currently heated with 2xK1 type rads giving a kw output of 0.75 kw each. Piped in series on 8mm microbore and 9 metre run to manifold.
In series because where the sun lounge connects with the main lounge there is already a rad and one close by in the dining area. I also piped those in series on the existing 8mm m/b that fed the dining rad. I added the 2x0.75 kw rads 8 year ago when my 29 year old 14kw Thorn olympic boiler was still going strong. 2015 the old Thorn cracked so was replaced with a 26kw system boiler but still using the 22mm to manifold to 8mm microbore with the same rads throughout.
The 26kw boiler heats the rads up much quicker but as we know the likes of conservatories and sun lounges can have heating needs quite different to the main building. Most of the rads are controlled by TVR's, with the temp stat sited in the hall which keeps the house comfortable but not the sun lounge.
I realize the 2x0.75 rads are under the room requirement. A recent re- calculation tells me I should have at least 2x1.4kw rads instead which in itself is not a problem to change. It's getting the control to keep the room warm say 19 to 21 C because once the hall stat is happy it is too long a time span before it demands heat again by which time the sun lounge has become cold.
So to improve things without re-plumbing (and you'll likely tell me I'm asking for the moon on a stick here) would be to fit 2x1.4kw rads. But also to replace all the existing TVR's with programmable ones. From what I understand these appear to be more sensitive to temperature requirements and improve comfort overall?
Or pull up the floorboards and run in a 15mm from the 22mm to the sun lounge. From the loft where the boiler is now is about 14 metres. Then I would wire in another stat for the sun lounge, fit another c/h zone valve in the loft so the room has it's independant temp control then. And re-connect the lounge and dining rads back to how they were originally.
Any ideas will be greatly appreciated.
In series because where the sun lounge connects with the main lounge there is already a rad and one close by in the dining area. I also piped those in series on the existing 8mm m/b that fed the dining rad. I added the 2x0.75 kw rads 8 year ago when my 29 year old 14kw Thorn olympic boiler was still going strong. 2015 the old Thorn cracked so was replaced with a 26kw system boiler but still using the 22mm to manifold to 8mm microbore with the same rads throughout.
The 26kw boiler heats the rads up much quicker but as we know the likes of conservatories and sun lounges can have heating needs quite different to the main building. Most of the rads are controlled by TVR's, with the temp stat sited in the hall which keeps the house comfortable but not the sun lounge.
I realize the 2x0.75 rads are under the room requirement. A recent re- calculation tells me I should have at least 2x1.4kw rads instead which in itself is not a problem to change. It's getting the control to keep the room warm say 19 to 21 C because once the hall stat is happy it is too long a time span before it demands heat again by which time the sun lounge has become cold.
So to improve things without re-plumbing (and you'll likely tell me I'm asking for the moon on a stick here) would be to fit 2x1.4kw rads. But also to replace all the existing TVR's with programmable ones. From what I understand these appear to be more sensitive to temperature requirements and improve comfort overall?
Or pull up the floorboards and run in a 15mm from the 22mm to the sun lounge. From the loft where the boiler is now is about 14 metres. Then I would wire in another stat for the sun lounge, fit another c/h zone valve in the loft so the room has it's independant temp control then. And re-connect the lounge and dining rads back to how they were originally.
Any ideas will be greatly appreciated.