Introduction to Central Heating & Part L

Read through the material below, then test your understanding.

Module Lessons

Central Heating

Heat Emitters: Radiators and Convectors

Radiator Valves: TRVs and Lockshields

System Layouts: One-Pipe and Two-Pipe

System Layouts: Microbore and Manifold

Boiler Types: Regular, System, and Combination

Condensing Boiler Principles

Open Vented Central Heating Systems

Sealed Central Heating Systems

Expansion Vessels and Pressure Relief

Central Heating Pumps and Circulators

System Controls: Programmers and Thermostats

Motorised Valves: 2-Port and 3-Port

Fully Pumped Systems: The Y-Plan

Fully Pumped Systems: The S-Plan

Filling, Venting, and System Balancing

Water Treatment and System Protection

Lesson Overview

This lesson introduces the principles of domestic central heating systems and examines the statutory energy efficiency requirements established under Building Regulations Part L.

Learning Objectives

Identify the primary purpose and main types of domestic central heating systems used in the UK.

Understand the key temperature parameters and flow-to-return differentials of traditional and condensing wet systems.

Apply the statutory requirements of Building Regulations Part L, including boiler efficiency, boiler interlock, and standard system controls.

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