EnviroVent EVF-H Wall Mounted Positive Input Ventilation Unit with Heater

The EnviroVent EVF-H Wall Mounted Ventilation Unit with Heater is a whole-house Positive Input Ventilation (PIV) system designed specifically for flats, apartments and homes where loft installation is not possible. Installed on an external wall, the unit continuously introduces filtered fresh air into the property to help reduce condensation, mould, excess humidity and stale indoor air.

Fresh air is drawn from outside, passed through the integral filter and gently supplied into the dwelling. This creates positive air pressure that encourages moisture-laden and stale air to leave through natural leakage paths and existing extract points. The result is improved indoor air quality and an effective solution for properties affected by streaming windows, musty odours and surface condensation.

Integral Comfort Heater

The EVF-H incorporates an intelligent comfort heater to temper incoming fresh air during colder weather. A temperature sensor monitors the incoming air and controls the tubular heater to help maintain a comfortable supply air temperature of approximately 10°C. Two independent safety cut-outs provide additional protection by shutting down the heater in the event of fan failure.

A separate heater enable and disable switch allows the heating function to be switched off when it is not required, helping minimise energy consumption during warmer periods.

Low Energy & Quiet Operation

Powered by an ultra-low watt brushless DC motor with sealed-for-life ball bearings, the EVF-H is designed for continuous, energy-efficient operation. Its forward-curved centrifugal fan provides multiple airflow settings, with approximately 9–23 litres per second available depending on the selected operating rate.

Quiet performance makes the unit particularly suitable for occupied residential properties, with outlet sound levels of less than 15dB(A) at 3 metres on the trickle setting and approximately 20.3dB(A) on boost.

Key Features

• Wall mounted Positive Input Ventilation (PIV) system
• Designed for flats and apartments without suitable loft space
• Provides continuous filtered fresh air throughout the dwelling
• Helps reduce condensation, black mould and excess humidity
• Helps minimise streaming windows and musty odours
• Integral intelligent comfort heater for tempering incoming air
• Helps maintain incoming supply air at approximately 10°C during cold conditions
• Two independent heater safety cut-outs
• Separate heater enable and disable control
• Ultra-low watt brushless DC motor
• Sealed-for-life ball bearings for reliable continuous operation
• Forward-curved centrifugal fan
• Multiple airflow settings including trickle and boost
• Airflow performance of approximately 9–23 l/s
• Specific fan power of approximately 0.29–0.39 W/l/s depending on setting
• Very quiet operation with sound levels below 15dB(A) at trickle
• Integral hours-run meter for operation and maintenance monitoring
• Long-life integral air quality and insect filter
• Recommended filter cleaning or replacement approximately every 24–36 months, depending on conditions
• Supplied with external louvre grille
• 100mm spigot for connection to circular ducting
• Compact wall-mounted design
• Suitable for retrofit and new-build applications
• 230V AC electrical supply
• BBA approved
• 5-year warranty

Performance

• Trickle airflow: Approximately 9–10 l/s
• Trickle power consumption: Approximately 3.4–3.6W
• Trickle sound level: Less than 15dB(A) at 3m
• Boost airflow: Approximately 20–23 l/s
• Boost power consumption: Approximately 6.1–7.4W
• Boost sound level: Approximately 20.3dB(A) at 3m

Dimensions & Specification

• Height: Approximately 505mm
• Width: Approximately 380mm
• Depth: Approximately 185mm
• Duct connection: 100mm
• Supply: 230V AC
• Installation: External wall mounted
• Application: Whole-house ventilation and condensation control

Typical Applications

The EnviroVent EVF-H is particularly suitable for flats, apartments, social housing and private rented properties experiencing persistent condensation, mould, high humidity or poor indoor air quality. Its compact wall-mounted design provides an effective PIV solution where conventional loft-mounted positive input ventilation cannot be installed.