Just after comments/ advice on my proposed set up at home.
My house is a large 4 bed semi over 4 floors, c/w basement which I will be making habitable (games room/ utility). Installed new radiators and they total up to approx 26kw, I erred on the side of caution when sizing the rads so they are slightly over sized.
I will end up with a family bathroom, loft ensuite c/w shower and cloakroom WC (plus possible shower) in the basement.
I plan on installing an Intergas system boiler on an s plan system along with a telford tempest stainless 200l indirect unvented cylinder, these will both be installed in the basement. I believe that the coil on this will require around 21kw. ALL cold feeds including the kitchen tap will come from the balanced cold supply before the cylinder.
I will be pairing the boiler with an opentherm Honeywell Lyric T6, all rads will have TRV's, automatic bypass valve fitted before CH/ DHW 2 port.
I am yet to check my water pressure but regardless of this in the next couple of years I will be replacing the incoming lead with 32mm MDPE back to the road.
The main question I have is regarding the boiler sizing. The HRE 30SB is rated at 26.3kW so should cope however this is at maximum capacity and leaves me stuck if I want to add extra rads etc. (likelihood is I may only ever install 1 extra rad anyway).
The HRE 40 SB is rated at 40kW but in the Intergas installer section on setting the maximum CH power this is with the fan running at 99% of capacity, none of the other boilers in the range show ratings with the fan at max. capacity. With the fan running at 85% comparable to the others the max. CH capacity is actually only 34.8kW.
I am erring towards the HRE 40 SB as the actual capacity is lower than the 40kw (which is way oversized), the cost difference is neglible and frankly I like having a bit of extra capacity if required.
I would set the maximum CH capacity to around 30kw anyway. Given that both boilers modulate down to nearly the exact same figures and I would be limiting the CH capacity anyway surely there will be little to no difference in energy consumption. I also believe that because the boiler is fully modulating and the minimum turn down figures are so close I shouldnt see the boiler cycling much more if at all?
Look forward to your comments, although this is my first post I have read the forum a lot and done a hell of a lot of reading on Intergas boilers recently!
My house is a large 4 bed semi over 4 floors, c/w basement which I will be making habitable (games room/ utility). Installed new radiators and they total up to approx 26kw, I erred on the side of caution when sizing the rads so they are slightly over sized.
I will end up with a family bathroom, loft ensuite c/w shower and cloakroom WC (plus possible shower) in the basement.
I plan on installing an Intergas system boiler on an s plan system along with a telford tempest stainless 200l indirect unvented cylinder, these will both be installed in the basement. I believe that the coil on this will require around 21kw. ALL cold feeds including the kitchen tap will come from the balanced cold supply before the cylinder.
I will be pairing the boiler with an opentherm Honeywell Lyric T6, all rads will have TRV's, automatic bypass valve fitted before CH/ DHW 2 port.
I am yet to check my water pressure but regardless of this in the next couple of years I will be replacing the incoming lead with 32mm MDPE back to the road.
The main question I have is regarding the boiler sizing. The HRE 30SB is rated at 26.3kW so should cope however this is at maximum capacity and leaves me stuck if I want to add extra rads etc. (likelihood is I may only ever install 1 extra rad anyway).
The HRE 40 SB is rated at 40kW but in the Intergas installer section on setting the maximum CH power this is with the fan running at 99% of capacity, none of the other boilers in the range show ratings with the fan at max. capacity. With the fan running at 85% comparable to the others the max. CH capacity is actually only 34.8kW.
I am erring towards the HRE 40 SB as the actual capacity is lower than the 40kw (which is way oversized), the cost difference is neglible and frankly I like having a bit of extra capacity if required.
I would set the maximum CH capacity to around 30kw anyway. Given that both boilers modulate down to nearly the exact same figures and I would be limiting the CH capacity anyway surely there will be little to no difference in energy consumption. I also believe that because the boiler is fully modulating and the minimum turn down figures are so close I shouldnt see the boiler cycling much more if at all?
Look forward to your comments, although this is my first post I have read the forum a lot and done a hell of a lot of reading on Intergas boilers recently!
