Honeywell RTH 221B Thermostat Installation

Описание к видео Honeywell RTH 221B Thermostat Installation

Though this thermostat is programmable it can also be used as a regular thermostat and can stay at one temperature if it's on hold. The program part of it is to save money by going back to a lower temperature, for instance, while you sleep or if you're at work. If you want a backlight you have to get RTH 2300. It also can control cooling and heating though I only use mine for heat. It can also control more complicated systems like a heat pump or steam system. I have a two-wire system for heat only.

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