Are gas furnaces efficient?

Asked By: Josefina Kniepeis | Last Updated: 14th March, 2020
Category: home and garden indoor environmental quality
4.2/5 (120 Views . 27 Votes)
A standard efficiency furnace provides 80% annual fuel utilization efficiency (AFUE). In this type of furnace, 20% of the energy produced by natural gas is expelled as exhaust. High efficiency furnaces offer 90% or more AFUE. So a 95% furnace is more efficient than an 80% furnace.

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Hereof, are new gas furnaces more efficient?

And New Furnaces Are Indeed Much More Efficient The measure of furnace efficiency is AFUE (annual fuel utilization efficiency), which is the percentage of natural gas the furnace converts into heating power. New furnaces, however, can have AFUEs from 80% all the way to 98.5%.

Additionally, what is the most efficient gas furnace? 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 R98V's value comes from a modulating design and a variable-speed blower.

Herein, is it cheaper to heat your house with gas or electric?

Less expensive to operate: Almost everywhere in the country, natural gas is significantly cheaper than electricity. Faster heating: Gas heat tends to heat up the home faster than electric heat because the gas furnace produces maximum heat as soon as the burners start running.

Are high efficiency furnaces worth it?

A furnace with an AFUE rating of 95% will require significantly less fuel (natural gas) to heat your home than a unit with an 80% AFUE rating. While higher-efficiency furnaces tend to cost more upfront, they allow homeowners to save money on heating costs every year.

39 Related Question Answers Found

How efficient is a 20 year old furnace?

20-year-old furnaces have an annual fuel utilization efficiency, or AFUE, of 78% or less, according to the U.S. Department of Energy. AFUE is the basic energy efficiency rating system used in the HVAC industry.

Should I replace my 30 year old furnace?

Regardless of the logic you follow, the 30-year mark is at or close to the maximum lifespan you should expect from your furnace. Even though furnaces can last 30 years or beyond, most experts recommend that you start shopping for a new furnace when your existing unit is 15 years old.

How long do gas furnaces last?

While some furnaces can last over 40 years (extremely rare), the average lifespan of a typical gas furnace is around 15-30 years. As long as you have scheduled yearly furnace maintenance, your furnace should easily last over 15 years.

Are 2 stage furnaces worth it?

A two stage furnace is NOT more efficient than a single stage furnace. It will not save you any money on your utility bills compared to a single stage furnace. In other words, a 95% efficient furnace is 95% efficient whether its running in low or high fire. No savings.

What are the best gas furnaces?


Here's a quick roundup of some of the best furnace brands on the market today:
  • American Standard Furnaces. American Standard furnaces units are one of the most reliable brands in the business.
  • Amana Gas Furnace Units.
  • Bryant Furnaces.
  • Carrier Furnaces.
  • Daikin Furnaces.
  • Goodman Gas Furnaces.
  • Lennox Furnaces.
  • Rheem Furnaces.

Who makes the best high efficiency gas furnace?

Average Furnace Cost
Rank Brand and Series Efficiency (SEER)
1 York TG8S 80%
2 York TM9V Up to 96%
3 Thermo Pride OL5 Up to 86%
4 York LX Up to 97%

Does a 2 stage furnace really save money?

Your two stage furnace saves on energy costs because it doesn't burn as much fuel. Your two-stage furnace saves gas because it doesn't dump as much fuel into the heat exchanger when it's only moderately cold outside.

How much does an 80 efficiency furnace cost?

Natural Gas & Propane Furnace Costs
Mid-range efficiency (80% AFUE) $900-$1,800
Mid-range efficiency (80% AFUE) w/ AC unit $2,500-$5,000
High efficiency (94% AFUE) $2,000-$3,000
Wall $1,200-$1,700
Unit $1,000-$4,800

Why my gas bill is so high?

Possible reasons for a gas bill which is higher than usual include: You have used your gas heater more or had more hot water showers due to unseasonably cold weather during the bill period.

Why is my electric bill so high?


One of the main reasons your electric bill may be high is that you leave your appliances or electronics plugged in whether you're using them or not. Anything with a clock, such as microwave ovens and coffee makers — and even older technologies, like VCRs — need power to keep time while turned off.

Why is gas cheaper than electricity?

More expensive to purchase and install than an electric system, but cheaper in the long run. Hot water uses a lot of power, so gas systems can save households a considerable amount of money. Comparatively cheap to buy but expensive to run. Gas cooktops heat faster than their electric counterparts.

What is the cheapest way to heat a house?

The 7 Cheapest Ways To Heat A Home
  1. Buy an energy-efficient space heater. Heating the whole house can be expensive and wasteful, especially if you only use a small portion of it.
  2. Buy a smart thermostat.
  3. Use credit cards to pay your utility bills.
  4. Sign up for budget billing.
  5. Insulate your attic.
  6. Invest in warm clothing.
  7. Consider installing solar panels.

How much electricity does a gas furnace use?

Q: How much electricity does a gas furnace need? A: A gas fired, forced air home furnace typically requires a small amount of electricity to ignite and operate in your home. Most gas heat furnaces use less than 600 watts of electricity, or less than half of a typical 15 amp electric circuit.

How much does it cost to run a gas furnace for an hour?

The U.S. Department of Energy requires an AFUE of at least 90 percent for residential gas furnaces to receive an ENERGY STAR rating. This means an annual gas use of 660 therms at a cost of $660, or almost 31.7 cents an hour.

How much does it cost to heat a house with electric?


The Electric Edge
Heating a home with electricity is less expensive. For winter 2014 to 2015, the average cost of using electric heat was $960. For the same period, heating oil costs averaged $1,851. Another advantage is that electric heaters are available for either whole houses or individual rooms.

How much does it cost to replace a gas furnace?

The national average cost of a standard efficiency natural gas furnace ranges from $2,150 to $5,900 with most homeowners paying around $3,100. The price may vary based on brand, complexity of install, and the efficiency of the new unit. Get free estimates from furnace replacement pros near you.

Which type of heater is cheapest to run?

The 5 Cheapest Types of Electric Heater to Run… & Why.
  • Infrared Heaters – the lowest wattage per heat provided makes these the cheapest to run.
  • Oil-Filled Heaters – their long-lasting heat makes the most out of the electricity.
  • Storage Heaters – saves in running costs by using off-peak electricity tariffs.