--- title: What Size Gas Furnace Does Your Home Need? description: Not sure what size gas furnace your home needs? This guide covers BTU sizing, gas vs electric comparison, and top furnace models available at Varouj Appliances. image: https://blog.varouj.com/hubfs/undefined-Oct-26-2026-12-20-42-8900-PM.png --- [Skip to content](https://blog.varouj.com/what-size-gas-furnace-does-your-home-need#main-content) [![Varouj Home Appliances & Home Improvement](https://blog.varouj.com/hs-fs/hubfs/logo-3.png?width=150&height=151&name=logo-3.png "Varouj Home Appliances & Home Improvement")](https://www.varouj.com/index.html) [Home](https://www.varouj.com/index.html) [About Us](https://www.varouj.com/pages/about-us) [Blogs](https://blog.varouj.com/) [Help Center](https://www.varouj.com/pages/help-center) [Financing](https://www.varouj.com/pages/financing) [Rebates](https://www.varouj.com/pages/rebates) [Deals](https://www.varouj.com/collections/daily-deals) [Builders](https://www.varouj.com/pages/builders) [Brands](https://www.varouj.com/pages/brands) APPLIANCES, AIR CONDITIONING & HOME IMPROVEMENT SINCE 1989 Oct 26, 2026, 5:30:26 AM # What Size Gas Furnace Does Your Home Need? ![Picture of Team Varouj](https://blog.varouj.com/hs-fs/hubfs/inspiring-new-boss%20(1).jpg?width=50&name=inspiring-new-boss%20(1).jpg) [Team Varouj](https://blog.varouj.com/author/team-varouj) Share: [facebook-f icon](http://www.facebook.com/share.php?u=https://blog.varouj.com/what-size-gas-furnace-does-your-home-need) [linkedin-in icon](http://www.linkedin.com/shareArticle?mini=true&url=https://blog.varouj.com/what-size-gas-furnace-does-your-home-need) [Twitter icon](https://twitter.com/intent/tweet?url=https://blog.varouj.com/what-size-gas-furnace-does-your-home-need) [pinterest-p icon](http://pinterest.com/pin/create/link/?url=https://blog.varouj.com/what-size-gas-furnace-does-your-home-need) [envelope icon](mailto:?body=https://blog.varouj.com/what-size-gas-furnace-does-your-home-need) # ![Empire direct vent gas wall furnace installed in a cozy living room with leather armchair and autumn view.](https://blog.varouj.com/hs-fs/hubfs/undefined-Oct-26-2026-12-20-42-8900-PM.png?width=936&height=522&name=undefined-Oct-26-2026-12-20-42-8900-PM.png) Gas Furnace Buying Guide: How to Choose the Right Size and Type Buying a gas furnace is not as simple as picking the most powerful option and calling it done. Get the size wrong and you pay for it every winter. A furnace that is too small runs constantly and never gets the house warm. One that is too large short-cycles, wearing itself out faster and leaving rooms feeling uneven and clammy. This guide covers what actually determines the right size gas furnace for a home, how gas compares to electric, and what to look for in the models available at Varouj Appliances. Whether you are replacing an aging unit or choosing a furnace for a new build, getting this decision right matters. ## Key Takeaways - **BTU range at Varouj:** 40,000 to 135,000 BTU across Comfort-Aire and Century lineups. - **AFUE options:** 80%, 92%, 96%, and 97%. The higher the rating, the less gas gets wasted. - **Gas heats fast:** For most US homes with a gas connection, a gas furnace is the quicker and cheaper option to run. - **No ducts?** The Empire DV215SG wall furnace installs directly into the wall. No ductwork needed. - **Licensed installation only:** Gas lines are not DIY. Varouj Appliances has qualified technicians for delivery and installation. ## Table of Contents 1. Why Does Gas Furnace Size Matter for Your Home? 2. Gas Furnace vs Electric Furnace: A Practical Comparison 3. Top Gas Furnaces at Varouj Appliances 4. Why Buyers Choose Gas Furnaces from Varouj Appliances 5. Frequently Asked Questions ## Why Does Gas Furnace Size Matter for Your Home? Furnace size is measured in BTU, which stands for British Thermal Unit. It tells you how much heat the furnace produces per hour. The higher the BTU, the more heating capacity the unit has. The goal is to match the furnace BTU output to what your home actually needs to maintain a comfortable temperature on the coldest day of the year. Too little output and the furnace runs non-stop without hitting the target temperature. Too much and it heats up too fast, shuts off, and cycles back on again repeatedly. That short-cycling wastes energy, creates uneven temperatures room to room, and puts unnecessary wear on the unit. ### What Affects the Size You Need? Several things determine how much BTU a home actually needs. These are general sizing factors: - **How big the space is:** More square footage means more BTU needed. Simple as that. - **Where you live:** A home in Los Angeles needs far less heating capacity than the same size home in Chicago or Minnesota. - **How well insulated it is:** Good insulation keeps heat in. Poor insulation lets it out. A drafty home will always need a bigger furnace than the floor area alone suggests. - **Ceiling height:** Taller ceilings mean more air to heat. If your home has high ceilings, factor that in. The gas furnace models at Varouj Appliances range from 40,000 BTU for smaller spaces up to 135,000 BTU for larger homes and commercial-adjacent applications. A qualified HVAC professional can perform a Manual J load calculation for your specific home to confirm the right output before you buy. **Browse gas furnaces at Varouj Appliances.** [Shop the furnace and heating collection →](https://www.varouj.com/collections/furnaces-heating) ## Gas Furnace vs Electric Furnace: A Practical Comparison The decision between a gas furnace and an electric furnace for house use comes down to what your home has access to and what your priorities are. Both types are available at Varouj Appliances. | Factor | Gas Furnace | Electric Furnace | | --- | --- | --- | | Fuel Source | Natural gas or propane | Electricity | | Heating Speed | Fast, high-output heat | Slower, steady heat | | Running Cost | Lower in most US regions | Higher where electricity rates are elevated | | Installation | Requires gas line | No gas line needed | | Best For | Homes with existing gas connection | Manufactured homes, areas without gas | | Available at Varouj | Yes: Comfort-Aire, Century, Empire | Yes: Comfort-Aire, Century | ### When Gas Makes More Sense Gas is the stronger choice for homes with an existing gas connection. It heats up fast, and a high efficiency gas furnace at 96% or 97% AFUE keeps running costs low over time. ### When Electric Makes More Sense An electric furnace for house use makes sense when there is no gas connection available. It is simpler to install and needs no gas line. Comfort-Aire and Century both carry electric options at Varouj Appliances. ### The Gas Wall Furnace Option For smaller spaces, room additions, or homes without a central duct system, a gas wall furnace is a direct, self-contained solution. The Empire DV215SG Direct Vent Gas Wall Furnace is a confirmed option at Varouj Appliances, available in natural gas and propane configurations. At 24 7/8 in. tall x 20 1/4 in. wide x 9 3/8 in. deep, it installs directly into the wall without requiring ductwork. ## Top Gas Furnaces at Varouj Appliances Varouj Appliances carries gas furnace models from Comfort-Aire, Century, and Empire across a range of BTU outputs, AFUE ratings, and configurations. Here are confirmed models currently in stock: ### Comfort-Aire 97% AFUE 45,000 BTU Two-Stage Upflow/Horizontal Gas Furnace (GUH97T045B3MP) A [high efficiency gas furnace](https://www.varouj.com/collections/furnaces-heating/products/comfort-aire-gas-furnace-guh97t045b3mp) at 97% AFUE with two-stage operation and variable speed motor. Sized for smaller to mid-size spaces. Dimensions: 17.5 x 28.5 x 33 in. Available from $3,373.00. ### Comfort-Aire 96% AFUE 90,000 BTU Single-Stage Downflow Gas Furnace (GDD96C090C4MP) A high efficiency furnace at 96% AFUE with 90,000 BTU output for larger homes. Downflow configuration suits specific installation layouts. Dimensions: 21.5 x 28.5 x 33 in. Available from $2,490.00. ### Comfort-Aire 80% AFUE 70,000 BTU Single-Stage Upflow/Horizontal Gas Furnace (GUH80C070B3MP) A practical mid-range gas furnace at 80% AFUE for homes where a high-efficiency unit is not the priority. 70,000 BTU output, upflow/horizontal configuration. Dimensions: 17.5 x 28.5 x 33 in. Available from $1,541.00. ### Empire DV215SG Direct Vent Gas Wall Furnace (DV215SGXNAT) A [gas wall furnace](https://www.varouj.com/collections/furnaces-heating)for rooms and spaces without central ductwork. Direct vent design, available in natural gas and propane. Dimensions: 24 7/8 in. H x 20 1/4 in. W x 9 3/8 in. D. Available from $1,469.00. **Ready to find the right furnace for your home?** [Shop furnaces and heaters at Varouj Appliances →](https://www.varouj.com/collections/furnaces-heating) ## Why Buyers Choose Gas Furnaces from Varouj Appliances - **Something for every home:** 40,000 to 135,000 BTU, single-stage and two-stage, gas and electric, upflow, downflow, multiposition, and wall furnace. It is all here. - **High efficiency models in stock:** Comfort-Aire and Century 97% AFUE two-stage furnaces for buyers who want the most out of every dollar of gas. - **Real installation support:** Varouj Appliances sends qualified technicians for gas furnace installation across Los Angeles and the US. Not just delivery, proper installation. - **Financing:** 0% APR for 12 months on qualifying purchases. - **A team that knows this stuff:** Call 1-888-440-5535 or Chat Now. Varouj has been helping customers pick the right appliance since 1989. ## Frequently Asked Questions ### What BTU gas furnace do I need for my home? BTU requirements depend on your home's floor area, insulation, ceiling height, climate, and window quality. As a general guide, colder climates and larger spaces need higher BTU output. The gas furnace models at Varouj Appliances range from 40,000 to 135,000 BTU. A Manual J load calculation by a qualified HVAC professional will give you the precise figure for your home. ### What is AFUE and why does it matter? AFUE stands for Annual Fuel Utilization Efficiency. A 97% AFUE high efficiency gas furnace converts 97 cents of every dollar of gas into usable heat. An 80% AFUE unit converts 80 cents. Higher AFUE means lower running costs over time, though the upfront cost is typically higher. Varouj Appliances carries models at 80%, 92%, 96%, and 97% AFUE. ### Is a gas furnace better than an electric furnace? It depends on your home. A gas furnace produces heat faster and typically costs less to run in most US regions. An electric furnace for house use is simpler to install and suits manufactured homes or buildings without a gas connection. Both are available at Varouj Appliances. ### What is a gas wall furnace and when should I use one? A gas wall furnace is a self-contained heating unit that installs directly into a wall without requiring ductwork. It is the right choice for individual rooms, additions, or homes without a central duct system. The Empire DV215SG at Varouj Appliances is a confirmed wall furnace option in natural gas and propane. ### Does Varouj Appliances install gas furnaces? Yes. Gas lines require a licensed technician, and Varouj Appliances has one. Delivery and installation are handled across Los Angeles and the US. Call 1-888-440-5535 or Chat Now on varouj.com. ## Related posts [![](https://blog.varouj.com/hs-fs/hubfs/undefined%20(5).jpeg?height=200&name=undefined%20(5).jpeg)](https://blog.varouj.com/patio-perfection-choosing-right-outdoor-furniture) [home comfort products](https://blog.varouj.com/tag/home-comfort-products), [PatioPerfection](https://blog.varouj.com/tag/patioperfection), [Outdoor Living](https://blog.varouj.com/tag/outdoor-living) ## [Patio Perfection: How to Choose the Right Outdoor Furniture for Your Home](https://blog.varouj.com/patio-perfection-choosing-right-outdoor-furniture) ![Picture of Team Varouj](https://blog.varouj.com/hs-fs/hubfs/inspiring-new-boss%20(1).jpg?width=50&name=inspiring-new-boss%20(1).jpg) [Team Varouj](https://blog.varouj.com/author/team-varouj) Mar 13, 2025, 12:47:25 AM [Read more](https://blog.varouj.com/patio-perfection-choosing-right-outdoor-furniture) [![](https://blog.varouj.com/hs-fs/hubfs/undefined-Oct-20-2026-09-38-24-8568-AM.png?height=200&name=undefined-Oct-20-2026-09-38-24-8568-AM.png)](https://blog.varouj.com/best-frigidaire-fridge-kitchens-apartments) ## [Best Frigidaire Fridge for Kitchens and Apartments](https://blog.varouj.com/best-frigidaire-fridge-kitchens-apartments) ![Picture of Team Varouj](https://blog.varouj.com/hs-fs/hubfs/inspiring-new-boss%20(1).jpg?width=50&name=inspiring-new-boss%20(1).jpg) [Team Varouj](https://blog.varouj.com/author/team-varouj) Oct 20, 2026, 2:50:53 AM [Read more](https://blog.varouj.com/best-frigidaire-fridge-kitchens-apartments) [![Over the range microwave installed above a gas range in a modern white kitchen.](https://blog.varouj.com/hs-fs/hubfs/undefined-Oct-26-2026-12-13-46-8735-PM.png?height=200&name=undefined-Oct-26-2026-12-13-46-8735-PM.png)](https://blog.varouj.com/over-the-range-microwave-buying-guide-sizes-venting-features) ## [Over the Range Microwave Buying Guide: Sizes, Venting and Features to Compare](https://blog.varouj.com/over-the-range-microwave-buying-guide-sizes-venting-features) ![Picture of Team Varouj](https://blog.varouj.com/hs-fs/hubfs/inspiring-new-boss%20(1).jpg?width=50&name=inspiring-new-boss%20(1).jpg) [Team Varouj](https://blog.varouj.com/author/team-varouj) Oct 26, 2026, 5:30:37 AM Over the Range Microwave Buying Guide An over the range microwave does two things at once: it... 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