Boilers level 2 CH

What type of boiler is the most efficient

• Back boiler

• Condensing boiler

• Fanned flue boiler

• Conventional flue boiler

What type of boilers require air from outside of the room for combustion

• Room sealed balanced flue

• Fanned flue boiler

• Open flue back boiler

• Conventional open flue

What is occurring in the photo

• Smoke from the flue due to incomplete products of combustion

• Condensation

• Smoke test being carried out on the flue

• The boiler is on fire

How many pipes does a typical condensing combi boiler require

• 5

• 6

• 7

• 8

What is the drawing showing

• Where to position the boiler

• Where the gas supply for a boiler should entry the building

• Where a boiler can be installed outside

• Where the boiler flue should terminate