Green thing 9 out of 10

I've been slipping on my posts, and struggling to reach green post 9 out of 10, but here it is - Changing air only when I need to and via a heat exchanger.

These two pictures show the fans in the 'wet' rooms (bathroom,toilet). The wet rooms each have a exhaust fans and these are connected together. They can be set to trigger on humidity (bathroom) or light on (toilet room which has no window - and hence automatic light and suitable trigger). As the humid air exits the building it does so via a passive heat exchanging, passing the heat from the exhaust air to the incoming air.

I chose the AIRFLOW Icon fans as you can have different trigger modules (IR, humidity,trigger) and they look so cool when they open ! The Icon 60 is a bit noisy and big for the bathroom, but its really powerful and clears the air in seconds. As its only on when the humidity is high, it comes on only at the end of my shower.

One of the Icon fans failed after 1 year. AIRFLOW have a 3 year guarantee and they changed it straightaway.

I'm thinking of connecting the Icon 60 to the C02 monitor to assist with forcing air out via the heat exchanger as I suck in fresh air using the UNICO air handler (or a smaller in let fan to save energy.) Something I'll experiment with in the summer.