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Read through the material below, then test your understanding.
Module Lessons
Hot Water
Hot Water Legislation and Standards
System Selection Factors
Open Vented Hot Water Systems
Hot Water Storage Cylinders
Combination and Quick Recovery Cylinders
Unvented Hot Water Systems
Localised Hot Water Systems
Hot Water Safety Controls
Discharge Pipework (D1/D2)
Decommissioning Hot Water Systems
Thermostatic Mixing Valves (TMVs)
Installing Shower Mixing Valves
Replacing Hot Water Components
Expansion of Hot Water Pipework
Testing and Inspecting Hot Water Systems
Hot Water System Fault Finding
Maintenance and Component Replacement
Lesson Overview
Selecting the correct domestic hot water system requires balancing customer demand, building layout, incoming mains pressure, and regulatory standards. Choosing the right system ensures energy efficiency, user safety, and adequate performance at every outlet.
Learning Objectives
Identify the core factors influencing the selection of domestic hot water systems.
Compare the suitability of centralised, localised, storage, and instantaneous systems for different dwellings.
Assess building constraints including water pressure, dead legs, space availability, and regulatory requirements.
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