#Negative pressure room vs positive install

New Build Properties:Ī nice modern newly built house which is very well insulated and well draught proofed, in my opinion, would lend itself better to mechanical ventilation and heat recovery (MVHR) because you don’t really want to pump cold air into your lovely warm house at it will cool your house down. However that doesn’t mean that it’s ideally suited to any type of home. Yes, it can be installed in any property. Read more on the benefits of ventilation here and whole house ventilation here. But they can also be installed to improve air quality in your home.

The main reason they get installed is to try and reduce problems with condensation and black mould in homes.

#Negative pressure room vs positive install

Why Would You Want to Install a Positive Pressure Ventilation System? As the moisture laden air escapes it’s replaced by fresh air from outside thus reducing the chances of condensation occurring within the property. This positive pressure air in your house will look for any tiny gaps in the fabric of the building such as trickle vents, suspended timber floors, cracks in walls, gaps around window and door frames and chimneys etc. The fan then pushes this fresh air into your hall or landing.Īs you’re now pushing air into your home the air pressure inside the house will increase, and since air moves from areas of high pressure to areas of low pressure, the moisture laden air within your home is going to try to escape. Within the unit is a ventilation fan which draws fresh air in from outside your property, either via your loft area (meaning your loft needs to be ventilated) or via a duct direct from outside. These systems typically comprise of a small unit which sits in your loft and is ducted through your landing or hallway (in a bungalow) ceiling.It’s ducted in these areas because they’re communal locations and have direct access to the majority of rooms in your home. They’re also often referred to as positive input ventilators (PIVs) and are often sought out and installed by people who find they have condensation issues in their home. What exactly is positive pressure ventilation and how does it fit into your home? Positive Pressure Ventilation in Your Home Vapour Barrier Or Vapour Control Layer?.