Fantech Electronic Wall Control With On-off, High And Low Speed And 20 Min. On - 40 Min. Off Cycle Selection

It's never been easier to control your home's heat recovery or energy recovery ventilator systems than with this triple-function wall control | Push the button once- HRV / ERV runs at a continuous low speed | Push the button twice- HRV / ERV cycles 20 minutes On / 40 minutes Off | Push the button three times- HRV / ERV runs at a continuous high speed | Compatible with SHR/VHR/SER series only