Ultra Low Power Consumption: Save money & the environment with our very quiet and highly efficient heat recovery unit, with highly efficient heat exchanger. Improved Air Quality: Recovers up to 75% of heat energy while removing stale air, reducing humidity, limiting black mould growth, & cutting condensation. Easy to Use & Maintain: Includes 2-Speed Controller & full installation instructions. Filters and heat exchangers are easily accessible & easy to clean. Ultra Compact Unit Design: Designed to be set-and-forget in small properties of approximately 40m² on normal speed, with boost option available for when you need it. High Quality & Tested Performance : Ventilation Megastore products are quality tested, so you know you're buying a high quality heat recovery ventilation system.