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Upgrade nowCondensing Boiler Principles
Read through the material below, then test your understanding.
Module Lessons
Central Heating
Introduction to Central Heating & Part L
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
Condensing boilers achieve exceptionally high fuel efficiency by recovering latent heat from combustion gases. This lesson covers condensing heat exchanger operation, dew point requirements, and the safe installation of acidic condensate drainage pipework.
Learning Objectives
Explain how primary and secondary heat exchangers recover sensible and latent heat.
Identify how the dew point determines the required central heating return water temperature.
State the sizing, material, gradient, and termination requirements for condensate discharge pipework.
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