The TW4 decentralized Energy Recovery Ventilator transfers clean outdoor air inside and moves polluted air outdoors, while harvesting ~90% of the heat energy – so you get fresh air without the downsides of heating or cooling it.
The WM12 is basically two TW4 modules side by side in a piece of tough polypropylene foam, so you can put it in a window.
The design is now in beta. People who request a unit by email will be contacted one at a time as units become available, starting with those most able to handle potential complications that come with the beta phase.
