... control fan coil, motorized valve,air valve Mechanical Thermostat for Central Air-conditioner MT01A Features:Suitbale for commerical,industry,reidential building ... fan coil, motorized valve, air valve at the bottom of central air-conditioner,make the environmental temperature controlled within the set ... : ±1°C when at 25°C. MT01A Mechanical Thermostat for Central Air-conditioner