Domestic Wet Central Heating System with combination or Combined Primary Storage Unit CPSU boiler (see note 3)

Description HC2

Domestic Wet Central Heating System with combination or Combined Primary Storage Unit CPSU boiler (see note 3)

Boiler

A combi or CPSU boiler which has a SEDBUK efficiency of at least :

• 78% if fuelled by natural gas (bands A to D)
• 80% if fuelled by LPG (bands A to C, and some from band D)
• 80% if fuelled by oil (bands A to C, and some from band D)

Boiler (see Notes 3 and 4)

Boiler

A combi or CPSU boiler which has a SEDBUK efficiency of at least :

• 82% if fuelled by natural gas (bands A to C)
• 84% if fuelled by LPG (bands A and B, and some from band C)
• 82% if fuelled by oil (bands A to C)

Boiler (see Notes 3 and 4)

Hot water store

None, unless included within boiler

Hot water store

None, unless included within boiler

Controls: (see Notes 8, 9 and 10)

• Time switch
• Room thermostat
• Boiler interlock (see Note 11)
• TRVs on all radiators, except in rooms with a room thermostat
• Automatic bypass valve (see Note 12)

Control: (see Notes 8, 9 and 10)

• Programmable room thermostat
• Boiler interlock (see Note 11)
• TRVs on all radiators, except in rooms with a room thermostat
• Automatic bypass valve (see Note 12)