hi , i am in the middle of an extension for my house , 2 adults 2 children 4 bedrooms , 1 bath 2 showers , used to have a combi , but due to new rooms etc i am changing the heating system.
Plan is to install a thermal store -- with a coil for the new ufh , a solar coil for future expansion , and a heat exchanger for the DHW, i have room for the thermal store and a system boiler ,
For Hot water i will use incoming mains into the mains feed on the store , with a mixing valve giving me the DHW
for the underfloor heating i will connect the ufh flow and return to the ufh manifold
To use the system boiler to heat the radiator circuit as well as heating the water in the store i plan to use a three port motorised valve to switch the boiler to heating the radiator circuit when needed
i have attached a pic of my basic plan ... a couple of questions , with a open vented Thermal store and a system gas boiler i do not need any extra expansion vessels do i ?
Do i need an extra pump for the radiator circuit ? , what else should i add to the connections ? View media item 38139
Plan is to install a thermal store -- with a coil for the new ufh , a solar coil for future expansion , and a heat exchanger for the DHW, i have room for the thermal store and a system boiler ,
For Hot water i will use incoming mains into the mains feed on the store , with a mixing valve giving me the DHW
for the underfloor heating i will connect the ufh flow and return to the ufh manifold
To use the system boiler to heat the radiator circuit as well as heating the water in the store i plan to use a three port motorised valve to switch the boiler to heating the radiator circuit when needed
i have attached a pic of my basic plan ... a couple of questions , with a open vented Thermal store and a system gas boiler i do not need any extra expansion vessels do i ?
Do i need an extra pump for the radiator circuit ? , what else should i add to the connections ? View media item 38139