The MVDC-MS unit from Vent-Axia features three fully variable speeds: normal, boost and purge. The unit can extract up to 118l/s and has 7 years warranty. The digital display allows installers to accurately set airflow, ensuring exactly the right ventilation rate. Accurate speed control helps minimise noise and energy consumption. Ideal for loft or cupboard mounting. Perfect for multi-room extract ventilation. Boosted via light switch (switch live) or wired/wireless boost switch. Is your loft cold or warm? (cold has only some insulation in the floor) - if the answer is cold, you will insulated ducting to avoid warm air condensing in the ducting before it is expelled. CALL US to discuss you project on 0330 223 6776