Design Temperature

As temperatures drop to historical lows tenants and home owners are noticing drops in their indoor temperature as well. This is because heating systems are designed for 11F outdoor temperature. They are designed for 99% of the conditions so that they can be more efficient when necessary. If the system is oversized for the few days that the temperatures drop below 11F they will operate very poorly on all the days that are above 11F. 

This means that in very cold weather such as 9F the indoor temperature will drop a few degrees. Customers should seal and winterize all leaking windows, doors and especially fireplaces if not in use. This will help keep the heat in on those very very cold winter days. Once the temperatures creep back over 11 degrees the indoor temperature will return to normal.