Whilst we certainly appreciate and understand the concepts of Passivhaus, there has always been one element where the counteractive solution has never sat too comfortably with us, and that is of ‘airtightness’.
The concept of prevention of heat loss by sealing up all the gaps in a house that air could infiltrate is understood, however the fact that the only fresh air you receive in a house is through a large and expensive machine is one we are yet to fully understand. This approach, at times, seems to contradict a sustainable approach to building.
A MVHR system in an airtight house may arguably actually produce air which is cleaner than the outside air (for those of us that live in cities anyway) something about it does not seem natural. Further that it would appear to give rise to unbalanced ventilation from the different requirements of rooms within a house (i.e. Wet rooms with a negative pressure and habitable rooms with a positive pressure) which place additional pressure on the building fabric.
The search for an alternative solution, which still satisfies the requirements of the occupants and any Building Regulations whilst still performing the key component of your whole house heating and ventilation needs, may be over!
The Ventive system effectively forms the same function as a MVHR but does so via a passive model, with minimal moving parts and with no annual maintenance or energy costs to support it. To us this fits perfectly with our sustainable approach to building.
Ventive has won various design an innovative awards and undergone extensive testing to enable it to be released as a product to market in the near future.
Through this testing, with the Imperial Colleague of London, Ventive claims a heat recovery of an average of 85% which stands it alongside the performance of most MVHR systems. The system works using the natural forces of convection and physics to achieve these results.
We are so excited by the potential application of Ventive in both retrofit and new build property. We hope to use the product and process in our own property, which we feel more comfortable with, as means to meet our heating and ventilation needs, with an airtight house.
We look forward to hopefully working with Ventive to provide a full house solution and reporting the progress of this here.
More information regarding Ventive can be found here: