A PIV system (Positive input ventilation) is not allowed in many European countries

PIV systems are not allowed in many countries because they overcome the insulation added to the home such as double glazing & insulation making the home less energy efficient.

What is the CHEAP ENVIROVENT Alternative?

Excess moisture is trapped in the home causing dampness, mould and condensation.  It’s a modern problem.  The more we seal a home to keep in heat, the more dampness is retained inside.  What the PIV system does is pressurises  the home to force air out through natural openings.  No door or window is 100% sealed & air can be forces through even the ceiling to the roof space.

DH1200 better alternative or just a cheap envirovent alternative?

The DH1200 can draw air from bedrooms or bathrooms, dry the air then put it back to any point.  Excess moisture can be vented away to the outside.

loft dehumidifiers by Ecor Pro
Fresh air with an Ecor Pro dehumidifier

LD800 Allows fresh air in & keeps heat in. Includes HEPA filter.

For larger properties look at the LD800.  This can take fresh air from the outside or from the loft space air.  Keep the house healthy yet retain heat

See the LD800

So here’s the sales pitch for Positive Input Ventilation (PIV)

Positive Input Ventilation (PIV) works as a whole house ventilation system and create fresh and healthy living environments by supplying fresh, filtered air into a property at a continuous rate throughout. 

PIV is required when:

✔ You don’t want to do a full renovation.

✔ You require a whole house ventilation solution.

✔ You don’t want to remove any walls or go back to brickwork.

But here’s the truth of what it is saying – Positive Input Ventilation (PIV)

Positive Input Ventilation (PIV) works as a whole house ventilation system bypassing the insulation that you have spent a lot of money putting in place.   This creates colder, more draughty air in the home.  It does indeed feel fresher as would opening the window.   Healthy environments do need fresh air but your home is actually designed for that anyway.  The issue is really to take away the condensation but leave the heat in at a continuous regulated rate throughout depending on the humidity level.

PIV is required when:

✔ You don’t care about heat or heating bills.

✔ You require a door to be left open when it’s operation but don’t want the security risk.

✔ You think that you need to remove all plaster back to the brickwork in the home to solve a condensation problem.  

See the cheap Envirovent alternative that gives fresh air Here or perhaps the easy system you can install yourself Here