When you go to buy a Gas Furnace, the AFUE Energy Efficiency Rating is an important consideration. Here’s how you compare the AFUE of gas furnaces –
Comparison of AFUE Gas Furnace Energy Efficiency Ratings
Read the whole article on Comparing AFUE of Gas Furnaces here – How to Compare AFUE Gas Furnace HVAC Energy Efficiency Ratings
By the way, are you looking for an HVAC system for your home?