... the commercial, industrial and civil constructions NTL-1000 Series of thermostats are usually used on the commercial ... low speed-middle speed-high speed, wind valve controller does not have this function.Function specNTL-1000A: ... 2 tubes fan coil controller, can be set up to control the fan ... of wind valveNTL-1000B: 4 tubes fan coil controller, can be set up to control the fan ...