I currently am running Two Ideal Isar Condensing Combi boilers (5 years old)
One is completely broken, the other is on the way out.
They run independantly for C/H on 2 zones but are T'd together for DHW (due to mains water pressure (6bar) and output requirement).
I need to fix/upgrade my system but have received lots of different advise.
Requirements:
Around 32kw c/h total output to feed approx 20 radiators.
DHW requirement, not sure but would need to run at least two high pressure mains fed shows + sinks at same time (5 bed's, 4 kids + wife in the jacuzzi bath!)
Boilers are currently situated on 2nd floor (of 3 floors) and don't have F&E tank at top of house (don't particularly want to fit one either!)
Would like (not essential) option of solar power in future.
Purchase/Installation cost, Reliability, Performance and Running Costs are all factors to consider.
Option 1:
Replace 2 combi's with large Baxi (40kw) - not sure if will cope with DHW requirements though.
Option 2:
Unvented System - don't like thought of space this would take up and extra installation,servicing cost, also think thermal store as more advanced option.
Option 3:
Replace 2 Ideal Combi's with 2 Baxi Combi's under the current set-up.
This would have more than enough output but would also require two service contracts etc.
Option 4:
Thermal Store or heat bank- not many installers know too much about them.
Are these suitable for my requirements?
We live in hard water area and have heard of limescale issues.
Will they need an F&E tank at top of house?
How do you go about getting one?
Any advise would be appreciated.
Thanks
JH
One is completely broken, the other is on the way out.
They run independantly for C/H on 2 zones but are T'd together for DHW (due to mains water pressure (6bar) and output requirement).
I need to fix/upgrade my system but have received lots of different advise.
Requirements:
Around 32kw c/h total output to feed approx 20 radiators.
DHW requirement, not sure but would need to run at least two high pressure mains fed shows + sinks at same time (5 bed's, 4 kids + wife in the jacuzzi bath!)
Boilers are currently situated on 2nd floor (of 3 floors) and don't have F&E tank at top of house (don't particularly want to fit one either!)
Would like (not essential) option of solar power in future.
Purchase/Installation cost, Reliability, Performance and Running Costs are all factors to consider.
Option 1:
Replace 2 combi's with large Baxi (40kw) - not sure if will cope with DHW requirements though.
Option 2:
Unvented System - don't like thought of space this would take up and extra installation,servicing cost, also think thermal store as more advanced option.
Option 3:
Replace 2 Ideal Combi's with 2 Baxi Combi's under the current set-up.
This would have more than enough output but would also require two service contracts etc.
Option 4:
Thermal Store or heat bank- not many installers know too much about them.
Are these suitable for my requirements?
We live in hard water area and have heard of limescale issues.
Will they need an F&E tank at top of house?
How do you go about getting one?
Any advise would be appreciated.
Thanks
JH