A standard efficiency furnace provides 80% annual fuel utilization efficiency (AFUE). High efficiency furnaces offer 90% or more AFUE. These days, 95% AFUE is a common rating among new gas-powered furnaces. So a 95% furnace is more efficient than an 80% furnace.

Barrels have a variety of uses, including storage of liquids such as water, oil, and alcohol arrack, and sake. They are also employed to hold maturing beverages such as wine, cognac, armagnac, sherry, port, whiskey, and beer.

Mixing air with the gas before combustion ensures that enough oxygen will be available and complete combustion will occur.

Condensing Gas Furnace: A high-efficiency furnace (90% AFUE or higher) utilizes a second heat exchanger to heat the air from condensed exhaust gases in order to reach higher efficiencies. A high-efficiency condensing furnace requires specialized venting.

An 80% AFUE for a gas furnace, for example, means the furnace outputs 80 BTUs of useful heat for every 100 BTUs of natural gas it burns. The remainder may be wasted heat in the exhaust. Furnaces with 90% or higher AFUE are considered high-efficiency in the HVAC industry.

Furnace Brands to Avoid Due to Quality Ratings and Owner Reviews

• Arcoaire (2.2 average rating)
• Buderus (1.7 average Rating)
• Burnham Furnaces (1.8 average Rating)
• Ducane (2.3 average rating)
• Evcon (2.2 average rating)
• Keepright (2.4 average rating)
• Tempstar (2.5 average rating)
• Weatherking (2.4 average rating)

Cost of High Efficiency (AFUE) Gas Furnaces VS. Standard Efficiency

With an 80% furnace, the lost 20% of heat energy is exhausted through the furnace’s vent to the outside. A 90% furnace has a secondary heat exchanger to recover these lost gases which then diverts the gases into a condensing phase. This process retains more heat and lowers your energy bills.

A 90% furnace has an Annual Fuel Utilization Efficiency of 90% or higher. The most efficient gas furnace on the market is one that has an A.F.U.E. (Annual Fuel Utilization Efficiency) of 90% or higher.

Installing or replacing a furnace costs between $2,643 and $6,386 with an average cost of $4,502 including materials, equipment and labor. Replacing a gas furnace runs from $3,800 to $10,000 or more for high efficiency models in complex installations. Electric models run slightly less at $2,000 to $7,000.

Energy Efficient Furnace Costs by Rating

Best Furnace Brands

• Daikin Furnaces.
• Goodman Gas Furnaces.
• Lennox Furnace Units.
• Rheem Furnaces.
• Ruud Furnace Units.
• Trane Gas Furnaces.
• York Furnace Units.
• HEIL Gas Furnaces.

A mid-sized home of 2,000 square feet would need approximately 50,000 to 60,000 Btu to heat it properly. With a less efficient furnace operating at 80 percent efficiency this would require a 60,000- to 72,000-Btu furnace.

The total price range is $1,750 to more than $6,000 based on cost factors like furnace size and features….New Furnace Replacement Cost and Installation Cost 2021.

• 1) Your furnace is more than 15 years old.
• 2) Your heating bill has increased.
• 3) Your furnace has been repaired frequently the past two years.
• 4) Your furnace makes strange noises.
• 5) Thermostat setting never keeps you comfortable.
• 6) Your burner flame is yellow instead of blue.
• Add up the furnace replacement signs.

Average cost: $2,000 – $6,592

For example, a 700- to 1,500-square-foot home will require a BTU rating between 40,000 and 60,000, which will cost between $2,000 and $3,000. A furnace for a home ranging in size from 2,000 and 5,000 square feet will need between 125,000 and 150,000 BTUs and will cost in the neighborhood of $3,300 to $6,500.

around 15 to 30 years

The average cost range for purchasing and installing a gas furnace designed to heat a 2,000-square-foot home with a 97% efficiency rating ranges from $3,000 to $8,000, with most homeowners spending around $6,000 total.

A two-stage furnace runs at 70% capacity most of the time it is heating. This gives you better efficiency. The heat cycle is longer, but more consistent. The most efficient two-stage furnaces are 95% to 97% efficient.

A 1,500-square-foot home will require between 45,000 to 90,000 BTUs. A 1,800-square-foot home will require between 55,000 to 110,000 BTUs.

Best furnace brands

• Trane – Best for Quality.
• Lennox – Best for Efficiency.
• Goodman – Best Value.
• Rheem – Best Warranty.
• Bryant – Best for Reliability.

Standard Warranty: It seems that Bryant offers a slightly better 10-year warranty on parts for all their units, while the Lennox warranties vary between model lines from five to 10 years.

AirEase is on par with lennox elite and signature series – just cosmetic differences, stainless instead of aluminized furnace primary heat exchanger and slightly different control board. Ducane, concord, air-flo etc are on par with the lennox merit series.

Trane. Trane systems are the top-of-the-line. They build their own compressors and Spine Fin coils for the ultimate in efficiency and reliability. Their HVAC units have a distinctive, sleek design.