PlumbingIQ
Sign InGet Started
PlumbingIQ

Learning

DashboardFlashcardsMy Progress

Testing & Mocks

Mock Exams

Account

Upgrade to Pro

⭐ Upgrade to Pro - £19

Unlock all lessons and mock exams to pass Level 2 + Level 3 theory exams.

Upgrade now
Lesson 10 of 22

Ventilation for Open-Flued & Room-Sealed Appliances

Read through the material below, then test your understanding.

Module Lessons

Domestic Fuel Systems, Combustion & Flues

Lesson Overview

This lesson covers ventilation requirements for open-flued and room-sealed appliances under BS 5440-2, detailing free area calculations for rooms and compartments, and essential installation rules.

Learning Objectives

Calculate combustion and cooling air requirements for open-flued and room-sealed appliances in rooms and compartments.

Apply adventitious air deductions and series ventilation sizing rules accurately.

Identify critical installation standards for air vents, grilles, ducts, and compartment clearances.

Unlock the full lesson & knowledge check

Get lifetime access to every Level 2 & 3 lesson, 3500+ total questions, and timed City & Guilds mock exams.

Get Pro Access (£19)

Already have Pro? Sign in

PlumbingIQ

Interactive City & Guilds Level 2 and Level 3 plumbing lessons, flashcards and mock exams, built for UK students and professionals.

© 2026 PlumbingIQ. All rights reserved.