Gas Furnace Efficiency Ratings

The price of a furnace generally rises in step with its fuel.

Gas furnace efficiency ratings.

This premier furnace boasts an efficiency rating of up to 99 that means it essentially converts every last bit of energy it uses into heating the home. As of january 2015 these requirements are pending. So a 95 furnace is more efficient than an 80. The single stage furnaces perform between 80 and 95 afue while two stage models operate between 80 and 96 7 afue ratings.

High efficiency furnaces offer 90 or more afue. Efficiency is measured by afue annual fuel utilization efficiency which refers to how well your furnace translates fuel into heat. The r98v s value comes from a modulating design and a variable speed blower. Non weatherized oil furnaces must be 83 percent efficient.

1 stage 2 stage and variable capacity gas furnaces in 80 and 90 plus options. A standard efficiency furnace provides 80 annual fuel utilization efficiency afue. Lennox slp99v variable capacity gas furnace series. Rheem furnaces rank highly in terms of ease of maintenance sound rating and energy efficiency.

The prestige series r98v rheem s most efficient gas furnace has an afue rating of up to 98 7 percent making it the most efficient model we came across during our research. The better units are equipped with variable speed blowers. Weatherized gas furnaces must be 81 percent efficient. These days 95 afue is a common rating among new gas powered furnaces.

In the 70s most gas furnaces had an afue around 65. Trane s gas furnaces combine fuel efficiency with noise reducing technology for complete comfort. An oil furnace generates heat using oil while gas furnaces are fueled by natural gas propane. Weatherized oil furnaces must be 78 percent efficient.

The lowest efficiency allowed by law for new gas furnaces is 78 percent and some new models achieve 97 percent near total efficiency. When comparing furnace reviews you should consider a variety of factors like gas type efficiency cost warranty and more. Today the bare minimum allowed by law is 78. Precise comfort technology allows the furnace to keep the temperature held exactly where you want it.

Reliability is the hallmark of these identical brands. Oil furnaces are typically priced lower and provide more heat per btu but are less efficient. All gas furnaces installed in the northern states about 30 in total must be 90 percent efficient. They re both very dependable and are a good value based on cost.

In this type of furnace 20 of the energy produced by natural gas is expelled as exhaust.