Answer: Starting watts of blower fan + running watts = 800 + 400 = 1200. Add the total to the heating element power requirement = 1200 + 8000 = 9200 watts. You would need a 9200 to 10000-watt generator to run your electric furnace. Learn what else can a 10000W generator run along with a furnace. Electric Furnace (20KW) Generator Size.Jul 27, 2022 · First, you need to determine the square footage of your home. To determine how big of a furnace you need, measure the length and width of each room in your home and multiply those measurements to determine the square footage of the house. Adjust your measurements accordingly since most furnace size charts assume the ceiling height to be eight feet. Prior to purchasing and installing a new furnace, you’ll need to determine what is the appropriate size unit needed to best serve your home.The size of furnace needed will be dependent on the home’s heating load. Work with a trusted heating and cooling professional who will configure your home’s heating load …A 1,000 sq ft home will need a 24,000 BTU furnace. As you can see, the size of your home is essential when determining the capacity of the furnace that you and your loved ones need. But, as we said, there …What is the average size of a furnace? The average size of a furnace generally falls within the range of 80,000 to 100,000 BTU. However, it is essential to note that the size of a furnace primarily depends on the specific heating needs of a home.For the average gas-fired, warm-air furnace, the minimum requirement for an efficiency rating is 80%. For larger furnaces of this type, efficiency ratings are 95% in the North and 90% in the South. Oil-fired, warm-air furnaces have a minimum requirement of 81% for smaller appliances and 85% for larger ones. …Find or Calculate the Square Footage of Your Home · 1,200-square-foot home will require between 35,000 and 75,000 BTUs · 1,800-square-foot home will require ...How big of a furnace do I need for a 3, 000 sq ft home? (Example 3) Furnace size for a 3,000 square foot home range from 105,000 BTU to 180,000 BTU, depending on the climate zone you’re in. Here is a table with calculated 3,000 sq ft furnace sizes for all 5 regions: Gas furnaces (low running costs, powerful … What Size Furnace Do I Need? – Ultimate Guide . Proper furnace sizing is crucial for efficient heating in your home. When it comes to furnaces and HVAC systems, it’s important to work with an experienced HVAC contractor. They will have the expertise and knowledge to ensure that your furnace is properly sized and installed. Choosing the correct size furnace filter is critical yet often overlooked. Selecting an improperly sized air filter significantly reduces furnace efficiency and performance. Outsized filters allow air to bypass completely, while undersized ones restrict airflow leading to insufficient circulation, equipment strain, and potential freezing. They also require far more frequent replacement, which ... Learn how to use our furnace size calculator to determine what size of furnace you need for any room area, insulation type, or outdoor temperature. Find out … The most common residential furnace size is around 60,000 BTUs, but this can vary based on factors like climate, insulation, and home size. What is the typical residential furnace size? For an average-sized home, a furnace between 40,000 to 100,000 BTUs is typical. Based on these figures, a 2,000 sq. ft. home in a moderate climate would need a furnace with an output between 80,000 and 90,000 BTUs. When making your calculations, you may need to round up or down to the nearest furnace size. Keep things like insulation, sunlight, and the height of your ceilings in mind when choosing whether to go with a smaller or …What Do You Need to Know About Trenchless Pipe Lining? Dec 22, 2020. 7 Common Problems You May Experience With Your Water Heater Dec 22, 2020. ... If you’re looking for a gas water heater and furnace chimney flue size tables / guides covering most of the possibilities, try this publication by Hart & Cooley. 4,986.How to Calculate Furnace Size For a 2000 Square Foot Home Steps. Find out the square footage of your home. Examine your insulation, windows, and doors. A drafty, poorly insulated home needs a more powerful furnace. Multiple square footage by 45 or 50 BTUs depending on insulation status. This produces the BTU output that …This quick and easy Home Standby Sizing Calculator will provide you with 3 possible generators to fit your needs, along with estimated installation costs, and financing options. Just provide your zip code and how much of your home you want to back up (all of it or just selected appliances) and the calculator will do the rest!Aug 28, 2022 · A midrange, new furnace costs between $1,500-$6,000 (for example, a Rheem furnace, which has an 80% AFUE rating, costs $1,488 plus installation). Opt for a high-end model with a higher AFUE rating ... Learn how to calculate what size inverter you need with The Inverter Store's handy guide. We make the process straightforward for you to fit your exact needs. The most common residential furnace size is around 60,000 BTUs, but this can vary based on factors like climate, insulation, and home size. What is the typical residential furnace size? For an average-sized home, a furnace between 40,000 to 100,000 BTUs is typical. The BTU of a home furnace should typically average between 40 to 45 BTU pre square foot, though this average applies only to homes located in cooler climates. Square footage measur...If you're in Washington, D.C., in the 1,900-square-foot home, and the furnace you're considering has an efficiency of 80 percent, you'll want your input rating to be 100,000 BTUs. You can calculate this with any size home. Just substitute your own total square footage, and multiply it by your regional heating factor.Factors affecting replacement cost include furnace type, size, efficiency, brand, and labor. Electric furnaces are the cheapest to replace, gas furnaces fall in the middle, and oil furnaces are typically the most expensive. Furnace sizes range from 40,000 BTUs to 150,000 BTUs. Furnaces between 40,000 and 60,000 BTUs cost about $2,000 …In warmer climates, multiply this number by 10 - 15. In more moderate climates, multiply by 20 - 30. And in cold climates multiply the square foot number by 30 - 40. For example, if you’re trying to heat 1000 square feet in a cold climate, 30,000 - 40,000 BTU’s will add significant warm air to your home.Rule of Thumb – The maximum size unit you should buy would be 15% over the BTUs you need for cooling and 40% of the BTUs for heating. The max for heat …Highlights. Investing in the right size heat pump can prevent energy waste. Calculate your approximate unit size by multiplying your home’s square footage by 20. The right-sized heat pump will last longer than one that is too big or too small. Your family’s lifestyle, location, shade, and windows can affect what size pump you need.A 60,000 BTU/hr. furnace will heat a 1400 square foot house. However, the average daily temperature, house insulation and other factors will have to be considered before making a final decision.Residential furnaces range from 40,000 to 200,000 BTUs. Most homes need a furnace somewhere between 60,000 and 120,000 BTUs. When looking for a new furnace, you’ll also want to take efficiency into account. For example, an 80,000-BTU furnace rated at 90% efficiency may only deliver about …Answer: Starting watts of blower fan + running watts = 800 + 400 = 1200. Add the total to the heating element power requirement = 1200 + 8000 = 9200 watts. You would need a 9200 to 10000-watt generator to run your electric furnace. Learn what else can a 10000W generator run along with a furnace. Electric Furnace (20KW) Generator Size.Jeff Jenkins tells us about his travel experiences and how he is trying to change the narrative of travel for plus-size travelers through his blog Chubby Diaries. I was compared to...Feb 10, 2021 · 2,100-square-foot house: 63,000–126,000 BTUs. 2,400-square-foot house: 72,000–144,000 BTUs. While the above chart helps you find the accurate furnace for your home, other factors play an important role in determining the BTU output your home needs. You will need to consider the climatic zone your home is located in. Let the qualified technicians at Forster Heating help you identify a unit that will fit your home properly. When you’re ready to begin, you can reach us at 530-885-8081 or book an appointment online. Whether you have some questions about furnace size or want to chat about options for your space, our experts are happy to help you out.Rule of Thumb — The maximum size unit you should buy would be 15% over the BTUs you need for cooling and 40% of the BTUs for heating.The max for heat pumps is 25% since it handles both cooling and heating. (Trane. You can use HVACDirect’s Sizing Guide here to find the right-sized furnace and AC for your mobile home. Furnace …The home would feel more comfortable, heat more evenly, and the furnace would operate at peak efficiency. The 2012 Energy Code requires that a furnace cannot be ...This quick and easy Home Standby Sizing Calculator will provide you with 3 possible generators to fit your needs, along with estimated installation costs, and financing options. Just provide your zip code and how much of your home you want to back up (all of it or just selected appliances) and the calculator will do the rest!Upvotes: 1,621. Received 185 Upvotes on 166 Posts. 15 KW electric furnaces typically require two circuits, one a 30 amp circuit with 10-2 NM-B cable and the other a 60 amp circuit with 6-2 NM-B cable. Most new furnaces will have breaker disconnects in them and that is where the circuits terminate, in the lugs of those breakers.For the area of a circular room, start by measuring the radius r, which is the distance from the edge of the room to the center. Then calculate πr 2. If your calculator does not have a pi (π) function, …Feb 10, 2023 · Climate zone heating factor: 50 to 60 BTUs per square foot. A third factor to consider is furnace efficiency. A furnace’s AFUE (annual fuel utilization efficiency) rating reflects how efficiently it converts the fuel’s energy into heat. For example, a furnace with an 80% AFUE rating converts 80% of its energy to heat. To learn more about what size furnace you need for your home, contact our team at Jesse Heating & Air Conditioning today! Menu. Request Service. Coupons. Call Us (217) 352-8511. Serving Decatur, Champaign, Urbana IL & the Surrounding Areas. View Specials. 24/7 Emergency Service (217) 352-8511. Request Service.It’s important to note that the actual size should be 0.25 inches to 0.5 inches smaller than the standard size. After determining the air filter sizes, you can choose a replacement air filter type and size. Most online air filter retailers have a custom air filter page, and there you’ll find a custom sizes option.Oct 28, 2022 · What Does Furnace Size Mean? If you’re shopping for a new heating unit, have you ever wondered what furnace size actually means? It turns out, furnace size refers to the furnace’s heating capacity rather than its physical size. Furnace capacity is measured in British thermal units, or BTUs, in 20,000 BTU increments. BTUs measure the amount ... X0445 Nominal Size: 25" x 20" x 6". X5422 Nominal Size: 20" x 26" x 3". See entire list at the end of this Article. See the complete list of 1 inch, 2 inch and 4 Inch Filters by Size and MERV rating. Lennox Air filters are critical components of your heating and cooling system. Your air filter helps improve the quality of your home’s air and ...Central AC Unit Cost. Before we get into sizing a residential central air unit, let’s take a quick look at pricing. On average, homeowners report spending $3,900 – 5,000 to install a 2.5 ton central air system in a house that has functional ductwork.. Fixing or changing the ductwork to accommodate the AC system can add as much as $3,000 …The average furnace has a heating output ranging from 80,000 to 100,000 BTUs, but you’ll see furnaces on the market ranging anywhere from 40,000 to 200,000 BTUs. As you may have guessed, generally the larger your home is, the larger size furnace you’ll need, and a high BTU furnace will be able to produce more heat.Here’s the calculation: Mini-Split Heat Pump Size (1,500 sq ft) = 1,500 sq ft * 30 BTU per sq ft = 45,000 BTU. For a 1,500 sq ft home, you would need about 45,000 BTU heat pump. Let’s convert that to tons and kWs; that’s 3.75 tons (about 4 tons) and about 13 kW. Residential gas furnaces typically range in size from 40,000 BTU/h to 120,000 BTU/h. The right size for your home will depend on a variety of factors, including the size and layout of your home, the insulation level, the local climate, and more. The primary factor in determining the size of your furnace is the square footage of your home. A general rule of thumb is that you need roughly 20 BTUs of heating power for each square foot of living space. So, if you have a 2,000 sq ft home, you would need a furnace with a capacity of 40,000 BTUs.. Now, you may wonder, “what size furnace do I need?” Small abodes of no more than 200 square feet use around 8,000 BTUs or less, while more spacious homes of 3,000 square feet only feel comfortable with an average BTU of 120,000. The typical home averages 2,000 square feet and runs on no more than 115,000 BTUs.Jul 27, 2022 · First, you need to determine the square footage of your home. To determine how big of a furnace you need, measure the length and width of each room in your home and multiply those measurements to determine the square footage of the house. Adjust your measurements accordingly since most furnace size charts assume the ceiling height to be eight feet. Gas and oil heaters only need electricity to turn on and run the fan. This means they are much easier to run on a backup generator. Furnaces generally have a wattage to start it and lower wattage to keep it running. For instance, the starting or surge watts for an oil furnace may be between 1000-2000 watts. The running watts may be …Factors affecting replacement cost include furnace type, size, efficiency, brand, and labor. Electric furnaces are the cheapest to replace, gas furnaces fall in the middle, and oil furnaces are typically the most expensive. Furnace sizes range from 40,000 BTUs to 150,000 BTUs. Furnaces between 40,000 and 60,000 BTUs cost about $2,000 …How big of a furnace do I need for a 3, 000 sq ft home? (Example 3) Furnace size for a 3,000 square foot home range from 105,000 BTU to 180,000 BTU, depending on the climate zone you’re in. Here is a table with calculated 3,000 sq ft furnace sizes for all 5 regions: Gas furnaces (low running costs, powerful …You will need a 1.5 ton to 5.0 ton unit, either an AC for cooling along with a furnace or a heat pump that will both heat and cool. If your split system includes central …Need a little help?: Q1 Which best describes your heating system? This field is required. Low Temperature Heat (e.g. Radiant Heat) High Temperature Heat (e.g. Baseboard, Fan Coils, Radiators) ... We list it on our site because we do sell replacement parts for this unit. Please contact us with any questions: 1-888-757-4774 ...Learn how to calculate the proper size of your furnace based on square footage, fuel type, efficiency rating and other factors. Find out how to choose the right furnace for your home heating needs and budget with …Are you in the market for a new furnace? If so, you’ve probably come across the name Heil. With a reputation for quality and reliability, Heil furnaces are a popular choice among h...For 60-amp electrical service, 6-gauge copper or aluminum wire is the correct size to power such devices as electric furnaces and large electric heaters. A 50-amp circuit breaker o...How big of a furnace do I need for a 3, 000 sq ft home? (Example 3) Furnace size for a 3,000 square foot home range from 105,000 BTU to 180,000 BTU, depending on the climate zone you’re in. Here is a table with calculated 3,000 sq ft furnace sizes for all 5 regions: Gas furnaces (low running costs, powerful …Aug 28, 2022 · A midrange, new furnace costs between $1,500-$6,000 (for example, a Rheem furnace, which has an 80% AFUE rating, costs $1,488 plus installation). Opt for a high-end model with a higher AFUE rating ... The BTU of a home furnace should typically average between 40 to 45 BTU pre square foot, though this average applies only to homes located in cooler climates. Square footage measur...The exact amps an electric furnace requires is solely based on the size of the furnace and its performance capabilities; however, typically electric furnaces require a draw between 60 and 80 amps. By multiplying the volts by amps you will receive total wattage. The average American household uses 220 volts for larger appliances; however, the ...The recommended heating factor for zone one homes is 30 to 35 BTU per square foot. The most common furnace size produces between 80,000 and 100,000 BTUs per hour, making it suitable for most family homes. A heating expert can help you choose the right type of furnace for your home.The first term that you will need to familiarize yourself with is BTUs. A BTU is a British Thermal Unit. Furnaces are rated by their output in BTUs. A 60,000 BTU furnace will …When it comes to heating your home, gas furnaces are one of the most cost-effective options. Not only do they provide a reliable source of heat, but they can also save you money in... If you live in a poorly insulated house that is 1,600 square feet in zone four, multiply 1,600 by 50 for a result of 80,000, meaning you need a furnace with an 80,000 BTU output. Calculating Output Some furnaces do not include a BTU output rating. To size a furnace that only includes a BTU input rating, you have to calculate the BTU output. Today, most furnaces in the market have an annual fuel utilization efficiency (AFUE) of between 90% and 98%. A 90% AFUE rating means that 90% of the heat produced goes into actual heating while 10% is lost. To put it more clearly, a 50 BTU output furnace with an AFUE rating of 98% will be more effective in heating a space than a 50 …What Size Air Conditioner Do I Need? The size of air conditioner you need depends primarily on your home’s square footage. ... System cost (20 points): We determine each brand’s average price range for a full-size AC or furnace. Most units cost between $3,100 and $8,500. The lower the average price range, the more points a company …When using a furnace duct size calculator, you’ll need to provide some input to get an accurate calculation. This may include the size and layout of the room, the type of furnace used, and the type of insulation in your home. The calculator will then use this information to determine the proper size of the ductwork required for your HVAC system.What size furnace do I need for a 2000 square foot home? approximately 50,000 to 60,000 Btu 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.Here is a step-by-step guide on how to use the wire size calculator: Select which electrical system you will be using. Either DC/AC Single-phase or AC Three-phase. That means the calculator can be a simple DC wire size calculator, all the way up to an AC three-phase tool. Enter a value for the source voltage, e.g., 12 V.So when in doubt, call Gilmore! (833) 444-3141. 8636 Antelope North Road Building D Antelope, CA 95843. '. Wondering how big of a furnace you need for your home? The heating installation experts at Gilmore Heating Air & Plumbing can help!f.Electric furnace: 5,000 to 25,000: Water heater: 3,000 to 4,500: Sump pump: ... Homeowners who are still wondering “What size generator do I need?” will want to consider how frequently they ...500-Gallon Tanks. The 500-gallon tank is the most common size propane tank for residential propane use. It is often used for home heating, generator powering, cooking, pool heating, and more. The primary benefit of this larger tank is that you can go that much longer without having to get it refilled. And when you are buying more gallons of ...Buying a new furnace for your manufactured or mobile home has three elements that need consideration: The Cost of the Furnace - Depending on the type and quality of mobile home furnace you choose, you should expect to pay between $950 - $1,200. That's not to say that you can't get even more expensive models.Once you’ve chosen a humidifier, the next step is to install it on your furnace. Before you begin, you’ll need to gather the necessary tools and materials, which may include a drill, screwdriver, pliers, and tubing. The installation process will vary depending on the type of humidifier you’ve chosen. In general, however, you’ll need to ...Factors affecting replacement cost include furnace type, size, efficiency, brand, and labor. Electric furnaces are the cheapest to replace, gas furnaces fall in the middle, and oil furnaces are typically the most expensive. Furnace sizes range from 40,000 BTUs to 150,000 BTUs. Furnaces between 40,000 and 60,000 BTUs cost about $2,000 …Rule of Thumb — The maximum size unit you should buy would be 15% over the BTUs you need for cooling and 40% of the BTUs for heating.The max for heat pumps is 25% since it handles both cooling and heating. (Trane. You can use HVACDirect’s Sizing Guide here to find the right-sized furnace and AC for your mobile home. Furnace …Upvotes: 1,621. Received 185 Upvotes on 166 Posts. 15 KW electric furnaces typically require two circuits, one a 30 amp circuit with 10-2 NM-B cable and the other a 60 amp circuit with 6-2 NM-B cable. Most new furnaces will have breaker disconnects in them and that is where the circuits terminate, in the lugs of those breakers.Steps: To ensure you’re purchasing the correct-size filters, remove the old air filter from the furnace and check its dimensions, which are indicated by thickness, width and length. When buying new air filters, disregard any that you can easily see through. Pleated filters have larger surface areas to trap more dirt.A midrange, new furnace costs between $1,500-$6,000 (for example, a Rheem furnace, which has an 80% AFUE rating, costs $1,488 plus installation). Opt for a high-end model with a higher AFUE rating ...4. Condition of doors and windows. As a general guideline, assuming your house is around 20-30 years old with average insulation, doors, and ...Simple Square-Footage Furnace Calculation. The quickest way to estimate the correct size for your mobile home furnace is by working from its square footage. If you don't have that figure from when you purchased your mobile home, you can just multiply its length and width to get the number. Typical single wides can range from 500 to 1,200 …When it comes to keeping your home warm and comfortable during the cold winter months, a gas furnace is an essential appliance. However, choosing the right size of gas furnace for ...Based on these figures, a 2,000 sq. ft. home in a moderate climate would need a furnace with an output between 80,000 and 90,000 BTUs. When making your calculations, you may need to round up or down to the nearest furnace size. Keep things like insulation, sunlight, and the height of your ceilings in mind when choosing whether to go with a smaller or …In warmer climates, multiply this number by 10 - 15. In more moderate climates, multiply by 20 - 30. And in cold climates multiply the square foot number by 30 - 40. For example, if you’re trying to heat 1000 square feet in a cold climate, 30,000 - 40,000 BTU’s will add significant warm air to your home.When buying a new heat pump, you will likely need to choose a heat strip size. For residential air handlers, heat strips range in size from 3kW to 25kW. The most widely used sizes are 5, 7.5, 10, 15, 20, and 25 kilowatts. Choosing the right size is crucial, as it could mean the difference between enjoying warm, cozy evenings in your home and ...If you take 100,000 BTU furnaces at these efficiency levels, you’ll get very different results: 80% = 80,000 BTU transferred to heat your home. 95% = 95,000 BTU transferred. If you need 90,000 BTU of heat, according to our gas furnace calculator, then the 80% furnace won’t do the job.The most efficient furnaces size for your home in Canada. Here is your furnace size calculator you can use to choose the best furnace size 416-836-0080 | 905-598-1089 [email protected] in mind that the actual size of the air filter will be smaller than the nominal size of the air filter. For example, an air filter with a nominal size of 16”x25”x1” will have an actual size of 15 …The average furnace has a heating output ranging from 80,000 to 100,000 BTUs, but you’ll see furnaces on the market ranging anywhere from 40,000 to 200,000 BTUs. As you may have guessed, generally the larger your home is, the larger size furnace you’ll need, and a high BTU furnace will be able to produce more heat.How to Calculate Furnace Size For a 2000 Square Foot Home Steps. Find out the square footage of your home. Examine your insulation, windows, and doors. A drafty, poorly insulated home needs a more powerful furnace. Multiple square footage by 45 or 50 BTUs depending on insulation status. This produces the BTU output that …Your geographic location also needs to be taken into account when finding the right size furnace for you. Our Sizing Guide will be able to help you figure out what size furnace is right for your home. The Quick Sizing Calculator located towards the bottom of the guide can help pinpoint the right mobile home furnace for you.How to Calculate Furnace Size For a 2000 Square Foot Home Steps. Find out the square footage of your home. Examine your insulation, windows, and doors. A drafty, poorly insulated home needs a more powerful furnace. Multiple square footage by 45 or 50 BTUs depending on insulation status. This produces the BTU output that …And, given current data, the need for generators is likely to grow. In the years between 2013 and 2021, the average power outage in the United States increased in duration from just over 3 hours ...So a 1,000-gallon propane tank holding 800 gallons of propane is considered “full”; a 500-gallon tank is adequately filled with 400 gallons of propane, etc. Keep this in mind when estimating how big your tank needs to be. Propane Tank Size. (# of gallons = capacity) Dimensions.It seems like it should be a fairly easy thing, kids’ shoe sizes. And yet their feet grown so damn rapidly, it’s like first they’re a four and then they’re an 8 (how is a toddler a...Sep 17, 2022 · The chart would indicate you need a furnace that’s around 108,000 BTUs. But let’s say your home is older, doesn’t have a lot of insulation, and has drafty windows. That could add an additional load to your heating requirement, so you might want to look at furnaces between 110,000 and 130,000 BTUs. To calculate heater sizes for smaller structures, you will first need to measure and calculate the building's length by width by ceiling height. This will reveal its size in cubic feet. So, if a garage is 16 x 24 x 14 feet, your heater has to cover 5,376 cubic feet. You will also need to determine the space's insulation factor, which determines ...Buying a new furnace for your manufactured or mobile home has three elements that need consideration: The Cost of the Furnace - Depending on the type and quality of mobile home furnace you choose, you should expect to pay between $950 - $1,200. That's not to say that you can't get even more expensive models.Oct 29, 2021 · What Size Furnace Do I Need for a 2,500 Square-Foot Home? If your home is larger than most others, you will need a furnace that can heat a large volume of air efficiently. Homes that are around 2,500 square feet and larger will required furnaces rated between 72,000 and 144,000 BTUs, or possibly even greater if needed. The size of furnace you need depends mainly on the size of your home—although there’s more to the equation than that (see below). In an average-size home in Manchester Center, VT (about 1,500 square feet), you’ll need about 35-40 BTUs per square foot—meaning you’ll need a 50,000-60,000 BTU unit, all other things being equal (which, of ...What size furnace do I need for a 2 000 square foot home? 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. How much is a new furnace for an 1800 square foot house?Web site MediaFire is a free file hosting service that allows unlimited file sizes and uploads, as well as unlimited downloads of files. Web site MediaFire is a free file hosting s...The BTU of a home furnace should typically average between 40 to 45 BTU pre square foot, though this average applies only to homes located in cooler climates. Square footage measur...BTU is a unit of measurement for energy; based on the many different factors that impact sizing, that ‘amount of energy’ needed for your furnace to operate efficiently in your home will be your BTU size. The most common furnace BTU sizes include: 60,000, 80,000, 100,000, and 120,000 BTUs. ---1