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Temporary Construction Thermostat - Heating Only 70° F Reduces fuel bills during the construction process. "No more high fuel bills caused by construction workers turning up the thermostat and leaving." Low cost (about ½ the cost of a conventional thermostat). Available in many temperatures for both heating and cooling. Rugged construction. Heat, moisture, paint and drywall dust do not affect its operation. Mercury-free. Safe for the environment. How Temp-Stat™ works: Temp-Stat™ works just like any other heat-only or cool-only thermostat. It is a special bimetal thermostat with the same characteristics as any room thermostat. How will it save the contractor time and money: Temp-Stat™ is about ½ the cost of a conventional thermostat. It only takes two (2) wires from the HVAC unit to work. It can simply be connected to the "R" and "W" (for heating) wires with wire nuts. It can literally hang off the wall during construction. Temp-Stat™ does not need to be mounted or level. If preferred, it can be mounted in the return air ductwork. Additionally it prevents the theft or damage of the permanent thermostat