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Ventilation Sizer
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Ventilation Sizer
Whole-dwelling rates and wet-room extract sizing — TGD Part F 2019 (IE) / AD Part F 2021 (UK)
🇮🇪 Ireland (TGD F 2019)
🇬🇧 England (AD F 2021)
🇮🇪
Active Regulation
TGD Part F 2019 — Ventilation
SI 263 of 2019 · Verified 2026-06-15
CURRENT
🏠 Dwelling Data
Bedrooms
Persons = 4
Floor Area
(m²)
Kitchens
Bathrooms / En-suites
WCs (separate)
Utility Rooms
Air Permeability
(m³/(h·m²) @50Pa)
<3.0 → mechanical required · <5.0 → cMEV recommended · ≥5.0 → natural acceptable
💨 Ventilation Strategy
🤖 Auto (from air perm)
🍃 Natural
💨 cMEV
♻️ MVHR
TGD F 2019 Section 1.3 — air permeability determines minimum acceptable strategy
💨 Size Ventilation System
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📋 Quick Reference — TGD F 2019 Extract Rates
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Size Ventilation System