Check the association rules. The rules here will not allow you to lower your thermostat lower then 55. Although 45 is the norm here and no one had problems. The units are all attached duplexes, i.e. side by side and no units above or below a unit.
All units were built in the late 70's and have gas. The units were built with the latest energy savings at the time. There are at least 2 zones in each unit. Most of the units have fireplaces that are converted to wood, pellet or gas with inserts. Condo rules do not allow outside vents. Those with wood or pellet stove are to store their supplies in their garage. Some of the owners have installed ventless monitors and are successful using them. We have discussed and found that running the heat monitor alone in the main room is not enough. The combination of lowing the thermostat to the lowest possible setting to avoid freezing in the bathrooms, bedrooms, and the heat monitor in the main room at the same temperature have lowed the gas bill but not by much. At a setting of 45 without a monitor I burn 99 therms for 1000 sq foot condo with with average outside temperature of 16 degrees for 31 days. This figure include tank hot water heater set at 120 degrees. My neighbor with the same criteria with a gas heat monitor burned 93 therms. A 6% savings. You have to do the math to figure the payback for a heat monitor. It is way down the road.
