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I have two circular static vent-a-matic vents in one of my windows. Can someone tell me what exactly they are for, and which way they should point (they can be rotated)? This is where they are placed:

Hello, I have a Honeywell ST6400C programmer which has a Honeywell T6360B1028 rotary dial room thermostat connected to it. Unfortunately this means that the temperature setting is the same all day long unless I manually change it. I'd therefore like to replace the room thermostat with a...