We recommend to everyone who buys a new furnace that they upgrade to something with a 95 afue or higher to get the most savings possible.
Furnace efficiency 80 vs 95.
The higher the afue percentage the more efficient a furnace is at converting gas into heating energy.
The same amount of money is spent on that fuel being used.
But in one scenario 80 of the fuel is used to contribute to delivering heat whereas in the other scenario 95 of the fuel is used to contribute to delivering heat.
First of all high efficiency furnaces can have a higher price tag than standard models.
But besides the level of efficiency another key difference between the 80 afue and 95 afue furnaces is that they operate a little differently.
On paper high efficiency furnaces seem like a good investment both in terms of energy bills and the environment.
Assuming no mechanical problems as described above i d go with the 95 your tenant s heating bill will be approximately 16 less than with the 80 version.
The higher cost can lead homeowners to either opt for a less efficient but cheaper replacement or to stay.
In this type of furnace 20 of the energy produced by natural gas is expelled as exhaust.
Still there are a few things to consider before committing to a furnace upgrade.
That means a 95 afue furnace will cost less to run than an 80 afue furnace.
Both types of furnaces have single stage or two stage heating models.
A standard efficiency furnace provides 80 annual fuel utilization efficiency afue.
An 80 efficiency furnace burns natural gas using open combustion by pulling air from the surrounding area and exhausting the waste up the chimney.
High efficiency furnaces offer 90 or more afue.
We are often asked what the differences in 80 and 96 efficient furnaces are.
A 95 efficiency furnace uses sealed combustion where the heating unit pulls air in from outdoors instead of using air in the home.
So a 95 furnace is more efficient than an 80 furnace.
To calculate those savings simply multiply the difference in afue 95 80 15 by your monthly or yearly bill amount.
Deciding between 80 96 efficient furnaces.
A 95 furnace will pull in outdoor air via a dedicated pvc pipe.
The same amount of fuel is used in both cases.
In fact it is 16 more efficient.
Obviously the 96 efficient furnace will be more efficient using natural gas to heat your home.