MVHR installers or alternatives?

[Roger440]

1 hour ago, Iceverge said:

I think Aereco had the original design. 

 

As I understood it it's just a strip of nylon that expands and contracts with humidity. 

 

20Pa really isn't that much. 100000Pa is 1 Bar or about 14psi.

 

Thanks. All the blurb i can fins suggests there needs to be a fan somewhere, you a PIV for them to work. 

 

But it seems they are a mystery product, theres just no info beyond the basic website description.

 

Im attracted to the concept as, essentially theres nothing to go wrong, and doesnt use any power. Which seems to good to be true. And we all know what normally means!