This Furnace Calculator is pretty straight-forward to use, and accounts for the the type of fuel & efficiency of your furnaces. or "Isn't this too big for our house?" For example in Massachusetts, there is a $1,000 rebate for 95% AFUE furnace with ECM motor, and $1,250 for 97% AFUE furnace with ECM. Calculating square feet:If you are unsure of your homes square footage, you can locate it on a blueprint/house drawing or in closing documents. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); Copyright 2014-2022, PICKHVAC All Rights Reserved. Furnace and boiler capacities are measured in BTUs, or British Thermal Units. Furnace prices include professional labor and materials needed to replace or install a warm air furnace, and (optional) new ductwork. In the next section, you will learn how to determine the furnace size that would fit your needs based on your location's average outdoor temperature and the floor area you are considering. Choosing a furnace depends on the heat energy needed to warm your home. Installing a heat pump together with a furnace costs $6,100 10,000+, including all equipment and professional installation. If your home is not well insulated, has older style windows, and/or a larger than average number of windows, you will want to select the larger system which falls within your square footage range. So, consider furnaces of 90% and higher AFUE. Socks Loss Index estimates the chance of losing a sock in the laundry. JavaScript seems to be disabled in your browser. If you have insulated metal ducts, this figure could be as high as 15% or more. In addition to the quality and quantity of insulation, a homes age and the number of windows can also impact how well it is insulated. ft. home, with average insulation. We can also calculate the maximum recommended furnace BTU capacity for this room by using 70 BTU/h/ft2 for the BTU recommendation based on our table of recommended BTU/h per unit area. Following that, we do the math for readers that prefer a quick, accurate answer to what size furnace do I need?. If possible, choose one with higher efficiency to help you make better use of your electricity. Next time you do duct cleaning, you may find some benjamins in there . Copyright 2022 Acton Media Inc. All rights reserved. For example, a furnace with 100,000 BTUs and an 80 percent efficiency rating will have an output rating of 80,000 BTUs. (back to top). The answer is in the documents, often a PDF file that lists Input and Output in separate columns. See more about Remodeling Calculator team here, My elderly mom just got a quote for 4000 to install a Goodman 60000 btu furnace in a house that is 1550 square feet. Should I Replace 80 Furnace with An More Efficient 95 Furnace? >Use the Pick HVAC Gas Furnace Sizing Calculator for most accurate results. The manuals supplied by manufacturers list both for any given furnace, but if you browse their websites, most furnaces are listed by input amount of heat created and you have to do the math to get output. It takes 1 BTU to increase the temperature of one pound of water by 1F. Plus, we give you an estimated furnace sizebecause manufacturers produce furnaces in increments of 10,000 to 20,000 BTU. If you have old, uninsulated ducts, you will be losing as much as 25-30% of your heat in those ducts alone. Two-story houses will also require a slightly lower BTU per square foot, as the second floor helps to insulate the space. Our calculator will spec multi unit jobs at multiples of 125K BTUs, and the remainder in steps of 40K, 60K, 80K, 100K, 110K and 120K BTU sizes. Measure/calculate the sections separately, and add them together. This information may be found on the homes blueprint or closing documents. Because home heating needs vary widely, furnaces come in a variety of sizes and BTU ratings. Note that a 95% AFUE (high efficiency) is pre-selected as its a most installed type of Gas Furnace today. You probably dont need a more efficient furnace. STEP 3: Select desired furnace efficiency. Address:7319 Sandscove Court, Ste 1 Winter Park FL. The 95% furnacemight be a little big, but it will definitely heat your home. Omni's not-flat Earth calculator helps you perform three experiments that prove the world is round. New triple glaze windows can reduce total house heat losses by 5-7%, and installing spray foam or blown-in insulation into hollow wall cavities can reduce house heat loss by another 7-10%. This is where our furnace BTU calculator comes in handy. You have to do the math, multiplying input by .98 efficiency. We may or may not be compensated for purchased you make as a result of our recommendation. On the other end of the spectrum, homes in Zone 7 (including northern Wisconsin and most of Maine) will require up to 60 BTUs per square foot. A general rule of thumb is that if your home is well insulated with newer style windows, you can select the smaller size system that falls within your total square footage. Break down the home into rectangles. An often-overlooked factor in using a BTU calculator is the homes insulation. What if I live near the edge of a zone? These brief instructions give details for providing accurate inputs into the sizing calculator. Most furnaces are offered in 15,000-20,000 btu increments so you just need to get close in terms of sizing. The main issue is shade some/little/none. One more thing to consider about your existing ductwork is the air flow requirement for high efficiency furnaces (with ECM motors). Call a top-rated pro. Is your home exposed to the sun, or is it shaded? Q: What size furnace do I need for a 1000 sq ft home? We add 8.5% heat loss coefficient to account for your duct losses. Pro Tip: many states offer an energy savings tax credits & rebates from your local utility company and/or state energy conservation agency. The Carrier/Bryant OVM oil furnace is available in several models/sizes, which are also named according to Output. Most top brands Carrier, Trane, Lennox, Rheemand all the others, make furnaces with heating capacities of 40,000 or 50,000 BTUs on the low end to 120,000 to 140,000 BTUs on the upper end. Ceiling Height Remember that Output is the essential number once you have determined how many BTUs furnace you need. If it is unheated, then dont. A: Having the right size furnace is crucial for any house. To determine the actual output of BTUs, multiply the BTU input by the percent efficiency rating. So, use the calculator and input different efficiency ratings based on the furnaces you might be considering. The doors and windows are in good condition you dont feel any drafts and its never extra-cold when you stand next to them. Since our equipment recommendation is for reference and information purposes only, the actual equipment decision should be made between you and your Furnace Installer. Whether or not you should opt for high efficiency furnace (versus a standard 80% efficiency unit), is a topic for a separate discussion, which we will cover soon on our blog. Using the same formula, we'll get 94,500 BTU/h capacity which means that we can sufficiently heat the room using a furnace with heating capacity ranging from 74,250-94,500 BTU/h. Get all the latest information on Events,Salesand Offers. Within the United States, the average home will require between 30 to 60 BTUs per square foot, depending on the regions climate zone heating factor. A 100- to 200 square-foot room, such as a small home office, will have an average recommendation of 4,000 to 8,000 BTUs. Typically, a larger furnace has a higher heating capacity, expressed in BTU/h or British Thermal Units per hour. The smaller furnace would adequately heat your home on all but the coldest days, but it still makes sense to ensure your home is cozy every day of a cold winter. The specifications PDF for the OVM98, for example, shows 98,000 BTU input and 80,000 BTU output. We rely on readers like you to share your HVAC system cost or quote. This price estimate is for a 100K BTU, 95% AFUE Furnace, which is appropriate for a 2000 sq. The question is how are these prices estimated? A room shaded by surrounding trees most of the time might need a larger furnace than a room that already gets heated by the sun during the day. Do I Really Need Flood Insurance? Newer homes typically have better and more recently updated insulation, which means fewer potential areas for air escape. Lets say the main body is 47 x 32, as in the example above. Regular maintenance can identify and fix small issues that may become bigger over time and ensure that the furnace is free of blockages or leaks so it runs at peak efficiency. If you plan to purchase a furnace for your house, you are in the right place. If you keep your thermostat low during the winter and wear an extra sweater for warmth, choose the cooler zone (higher number) for your location. Concentric / Downflow Kits / Dual Fuel Kits. Thats pretty straightforward. Many large homes, especially where winters are cold, have two furnaces. Additionally, homes that arent appropriately heated can quickly run up a homeowners bills. An average 2,000-square foot home will need between 80,000 and 115,000 BTUs to heat efficiently. Use the calculator, or for a quick answer, see the examples below that answer common questions like: We take the size, climate and insulation value, and give you the most accurate furnace btu calculation results youll find online. The bolt torque calculator helps you make sure you tighten your bolts correctly. PickHVAC is also a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Heat loss in the ducts and through the chimney. Thirdly, if you have a furnace salesperson in to give you a quote, youll be able to knowledgeably discuss furnace sizing with them, so you will feel in charge of the process rather than wondering what they are talking about! A simple rectangle is easiest. Start Here - Enter Your Zip Code. We will price a 125K + 40K BTU system. Not much has been done to the house. Keep in mind that homes in Zones 1 through 3 might not need a furnace at all and may be able to control the temperature with a heat pump; however, homes in Zones 4 through 7 will typically require the heating power of a furnace. This is where the heat comes from and gets distributed around the house for water heating, heating the floors and walls, or whatever equipment you have connected to the furnace. The results show the most common furnace size for each scenario. Leo has been a contractor since 2003, specializing in: roofing, siding, general contracting (GC) and residential remodeling. This will NEVER affect our opinion of a product or service! You'll get how many BTUs needed for your furnace. This table can help you get an estimated BTU for gas or propane furnace easily. The Pick HVAC Furnace Sizing Calculator gives results with BTU sizes over 200,000 BTUs. Get free, no-commitment estimates from experts near you. Know your Numbers! Homeowners tend to think in terms of output how many BTUs do I need for a warm house on the coldest day of winter? An HVAC professional can answer any questions and determine which type and size of furnace are best for the home in question. Q: What size furnace do I need for a 2000 sq ft home? What size furnace do I need for a 1,000 square foot home? A furnace is a heating appliance that can either be powered using fuel or electricity to produce heat using a heat exchanger. This represents the amount of energy necessary to increase the temperature of one pound of water by one degree Fahrenheit. Keep on reading to learn how to use our furnace size calculator to determine what size of furnace you need in no time. Thats 1,500 square feet. For large homes, how that heat is produced, through one furnace or two, is best determined by considering the floor plan of your home and what space is occupied most frequently and during what times of the day. Pretty simple. See costs in your area Sample calculation on how to determine furnace size. Hours of Operation:Monday-Friday 8am - 10pm EST.