When buying a new furnace should I look for a furnace with the highest AFUE rating?
Not exactly. The efficiency rating is just one factor to consider when looking for a new furnace. Furnaces use electricity to run fans and motors. The amount of electricity used varies greatly, depending on the type of furnace. Be sure to check electricity usage before making a purchase decision. Other important factors to consider include: How long you plan to live in your house, special comfort needs, fuel availability, fuel cost. and climate.