The R135 and R135A-Series rotary switches are single pole, single throw “L” rated up to 3A, feature an ONOFF repeating action, and are available with a nylon actuating knob; nylon snap-in bracket or nickel-plated brass bushing. These switches are typically used to control lighting functions.
MOF captures hot CO2 from industrial exhaust streams
How much so-called "hot" exhaust could be usefully captured for other heating purposes (domestic/commercial) or for growing crops?