Condensing Boilers Worksheet

What is the maximum return temperature at which modern condensing boilers will work in condensing mode?

• 60 degrees

• 50 degrees

• 70 degrees

• 82 degrees

Why is it necessary to slow the flow of water through each radiator in a modern condensing boiler system?

• To increase the pressure in the system

• To allow time for the water to cool

• To reduce noise from the radiators

• To prevent leaks in the pipes

According to the text, what is the typical maximum temperature setting for central heating in most boilers?

• 50 degrees

• 65 degrees

• 82 degrees

• 21 degrees

Explain why most boilers are installed with their heating and hot water settings at maximum, and discuss one potential drawback of this practice for boiler efficiency.

• To ensure the system heats rooms quickly; drawback: increased noise

• To meet system design for cold weather and avoid callbacks; drawback: not good for boiler efficiency

• To reduce installation time; drawback: higher installation cost

• To prevent water leaks; drawback: lower water pressure

At what temperature is it generally sufficient to set your boiler for most of the year, according to the text?

• 82 degrees

• 65 degrees

• 50 degrees

• 14 degrees

Why does the majority of fuel used in heating come from the initial start up of the radiators?

• Because the radiators are already warm

• Because the radiators must heat up from room temperature to the desired temperature

• Because the boiler is set to maximum capacity

• Because the thermostat is always on

According to the text, when does the thermostat stop the boiler?

• When the room temperature drops below 14 degrees

• When the heating is satisfied

• When the boiler is set to 65 degrees

• When the radiators are cold

Why does hot water need to be set to 65 degrees only if you have a storage cylinder?

• To save energy

• To prevent legionella

• To make showers hotter

• To reduce boiler wear

Explain the process that occurs after the thermostat stops the boiler, based on the text.

• The radiators heat up further

• The radiators slowly cool to room temperature until the room cools below the desired temperature, then the process starts again

• The boiler continues running at low power

• The hot water temperature increases

What is the main purpose of weather compensation in a heating system?

• To adjust the radiator temperature based on outside temperature

• To increase the maximum temperature of hot water

• To mix hot water with cold water for safety

• To turn the boiler on and off at scheduled times