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What is the method used by warm air heating systems to move heated air throughout the dwelling?

• Through water pipes

• Using electric coils

• Via ducts, vents or grills

• By natural convection

What is a potential issue with warm air heating systems despite good filtration?

• They can cause water leakage

• They can distribute bacteria and dust

• They can lead to excessive humidity

• They can produce a lot of noise

Where were gas or oil-fired warm air units traditionally very popular?

• In the UK

• In the US

• In Canada

• In Australia

What is the function of the component labeled "Heat exchanger" in the warm air heating system?

• To distribute warm air throughout the building

• To ignite the fuel for heating

• To transfer heat from the combustion process to the air

• To filter out impurities from the air

Which component is responsible for pushing the heated air into the distribution system?

• Combustion fan

• Control board

• Heat exchanger

• Distribution fan

What is the purpose of the "Filter" in the warm air heating system?

• To clean the air before it is heated

• To control the temperature of the air

• To initiate the combustion process

• To regulate the flow of air

What is one of the advantages of new warm air heating units?

• They take up a lot of space

• They are low efficiency

• They have quick heat-up times within the property

• They are difficult to retrofit into existing properties

Which of the following is a disadvantage of warm air heating systems?

• They have no heat emitters on show

• They can spread bacteria and dust with the air movement

• New units are high efficiency

• They provide a separate source of heat for HW generation

Why might warm air heating systems be considered unsightly?

• They have quick heat-up times

• They have high efficiency

• The heat unit and ductwork can be unsightly

• They do not require a separate source of heat for HW generation

What is a challenge when installing warm air heating in existing properties?

• They are highly efficient

• They have no heat emitters on show

• They are easy to install

• They are difficult to retrofit