Founded in 1999， Tongdy Control Technology Co.， Ltd. is a manufacturer of digital thermostats for HVAC and indoor air quality monitors. Our main products include programmable and non-programmable digital， fan-coil， air damper， boiler heating， electric diffuser， proportional-action controlling， and network room thermostats， and remote control， VAV control， telephone remote control， and IAQ detecting systems. Our assets include a 3，000 square meter factory and advanced production equipment. As a high standard auto-control technology company， we are committed to R&D and have developed high quality control products for central air conditioning， residential air conditioning， heating， ventilation， and indoor air quality applications. All products adopt microprocessor technology and many have RS485 communication interfaces providing good stability， reliability， and performance at the lowest possible price
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