EnviroVent manufactures the UK’s widest choice of BBA Approved Positive Input Ventilation (PIV) Units suitable for both houses and flats. As part of the award winning Lifetime Range®, these energy efficient units offer a cost effective and permanent solution for properties which suffer from condensation and mould problems.
PIV works by delivering fresh, filtered and clean air into the home from a central position such as the loft space, hall or landing. This method of ventilation dilutes high levels of humidity and other harmful household contaminants, creating a healthy all year round living environment free from condensation and mould. What’s more, PIV can help alleviate the symptoms of asthma and other respiratory problems. Dust mites, a known trigger of asthma and other allergies, thrive in environments with high levels of humidity. By reducing the levels of humidity, the dust mite population is also reduced.
Heat distribution and solar gain
The added benefit of choosing PIV is that it can help redistribute heat around the home. Heat normally accumulates at the highest point in a property, and roof tiles often act as solar collectors which radiate heat into the loft space. According to a report by the Energy Saving Trust, The Good Practice Guide, the average solar gain in the loft space throughout the heating season is 3 degrees resulting in up to 550 kilowatts of free energy that usually ‘sits’ unused in the loft space. With a PIV unit this dry, warm loft air and the heat usually lost at ceiling level are redistributed throughout the property and can reducing annual space heating costs by up to 10%.
MIV and summer cooling
EnviroVent have built on the principals of PIV and developed MIV® (Multiple Input Ventilation). Instead of delivering a single source of fresh air into a property, the MIV unit supplies, fresh filtered air into more than one area of the dwelling. Furthermore, both a PIV and MIV unit can be upgraded to an Air Source version. This gives the unit the facility to source cooler air from outside when the temperature in the loft space reaches 25 degrees, keeping the occupants cool in the warmer months.
Easy to maintain and backed-up by an ongoing 5 year warranty, EnviroVent’s PIV units are suitable for any domestic dwelling, offering the lowest lifecycle costs and attractive long term savings.