In the past, in winter, we need to adjust the manual control valve or open the windows to avoid too warm.Use cosistat CR series, you only adjust the control valve once then the thermostatic will sense the room temperature. That is more environmental friendly and save more *.Suitable for all types of heaters, keep all room with suitable comfortable temperature and not waste energy any more. If you have interesting, please contact us on any time for more information.We hope to hear from you as soon as possible.B/GAudi Chan
