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Frequently Asked Questions...

Q. Do I need trickle vents with continuous extract?

Part F does require trickle vents to be located in habitable rooms and provide a minimum of 2500mm² Equivalent Area per room when fitted with a Continuous Mechanical Extract Ventilator where airtightness is better than 5m³/hr/m².

Where airtightness is worse than 5m³/hr/m² trickle vents do not need to be used.

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