How Are Furnaces Rated?

Gas and oil furnaces are rated by Annual Fuel Utilization Efficiency (AFUE); this number, a percentage, indicates how much of your fuel is used to heat your home and how much is wasted.

The higher the AFUE rating, the greater the efficiency.

For example, if a furnace has a rating of 80%, the furnace converts 80% of the fuel that you supply to heat and 20% is lost out the chimney. Older furnaces waste as much as 50% of every energy dollar, although most furnaces still in operation today are 60-80% efficient.

The trend has been to replace these inefficient furnaces with condensing gas furnaces. The most efficient furnaces in the industry, Lennox condensing gas furnaces, reach AFUE efficiency ratings over 98% and can save up to 25% of your electricity bill too!

Fortunately, newer variable speed ECM blowers in many new furnaces can move air more efficiently at a fraction of the cost. Savings are most often $300.00 to as much as $500.00 per year! This is becoming even more significant with rising power costs and the HST tax on energy bills.

Gas Furnaces

• New gas furnaces can have a AFUE rating of 89% to 98%
• Require minimal maintenance
• Gas costs less than oil
• Quieter and cleaner to run
• Initial installation cost more than oil

Regardless of the type of home heating system you need, Climate Works provides installation, service and financing options for homeowners that fit your needs. To find out more about the furnaces we carry, browse through our selection.