There'll even be a minimal-voltage wire connecting the condensing unit on the furnace so it might be managed by the thermostat. If you are using a bit of Plexiglas, simply just slide it in the windowsill beside (or earlier mentioned) the exhaust hose window connection, and hold it in place https://thefairlist.com/story8702052/getting-my-how-to-install-air-conditioners-to-work