Brennan offers furnaces from several of the world's leading manufacturers.

Heating and air conditioning systems are the biggest users of energy in the home, up to 75% of the utility bill. A new high-efficiency furnace can save up to 50% in operating costs over a ten-year-old furnace. The operating cost savings for the furnaces we offer will pay for the difference in initial cost of these high-efficiency furnaces many times over.

A new furnace should last at least 15-20 years. The operating cost savings for the furnaces we are offering will pay for the difference in first cost of these high-efficiency furnaces many times over the lower cost of the government-mandated minimum efficiency furnaces.