CENWAT Central Heating System Design

Question 1

What is the primary purpose of a central heating system in a UK domestic property?

Accepted Answer

To distribute heat from a single source throughout the building

Answer

A central heating system distributes heat generated from a single source (usually a boiler) throughout the building via a network of pipes and radiators.

Question 2

Which pipework layout uses a single pipe that connects all radiators in sequence?

Accepted Answer

One-pipe system

Answer

A one-pipe system uses a single pipe from which all radiators are connected in series; water flows through the loop and each radiator taps off it.

Question 3

In a sealed central heating system, what component absorbs expansion of water when heated?

Accepted Answer

Expansion vessel

Answer

An expansion vessel contains a pressurised bladder that accommodates the increase in water volume as the system heats up, maintaining stable pressure.

Question 4

What is the recommended system design working pressure for most sealed domestic central heating systems?

Accepted Answer

1–1.5 bar when cold

Answer

Most domestic sealed systems are charged to 1–1.5 bar when cold, rising slightly when hot but remaining below the pressure relief valve set point.

Question 5

Which document provides the primary design guidance for central heating installations in the UK?

Accepted Answer

BS EN 12828

Answer

BS EN 12828 is the European standard for heating systems in buildings and provides design guidance for hot water central heating systems.

ACS CENWAT Practice Test

ACS CENWAT Practice Test

CENWAT Central Heating System Design