This dynamic kit builder provides a quick, helpful estimate of the ventilation system and components that may suit your home, based on typical requirements from Approved Document F. It automatically configures a system that’s close to the correct size, specification, and price for most properties.

Every home is different, so final airflow rates, valve numbers, duct runs, and system layout can vary depending on your property and installation details. If you’d like a fully tailored design, you can request our free MVHR design service below, where our specialists will review your project and confirm everything is sized and specified correctly.