About The Author: Travis Baugh is a Digital Brand Marketing Manager for Bryant, where he creates clear, helpful content to guide homeowners through heating, cooling, and indoor air quality decisions. His goal is to empower readers with the knowledge they need to choose the right comfort solutions for their home—confidently and comfortably.
What Is an Upflow Furnace?
By Travis Baugh | Expert Review By Seth Faber - Product Manager, Furnaces
An upflow furnace is a forced-air heating system that intakes cool air from the bottom of the cabinet, heats it internally, and discharges warm air through the top. This vertical configuration is commonly used in homes where the supply ductwork is located above the furnace, such as in basements, utility rooms, or closets.
How Does an Upflow Furnace Work?
An upflow furnace heats a home by drawing cool return air into the bottom of the cabinet, passing it over a heat exchanger, and using a blower motor to move the heated air upward into the supply plenum and ductwork. The cycle repeats until the thermostat's set temperature is reached.
Here is the step-by-step heating cycle:
- Air Intake: Return air enters the furnace at the bottom of the cabinet.
- Heating Process: The air passes over the heat exchanger, which is warmed by the burner.
- Distribution: The furnace's blower motor moves the heated air upward into the supply plenum.
- Circulation: The warm air travels through the overhead ductwork to heat your living spaces.
The upflow configuration is primarily an installation orientation. It does not, by itself, determine a furnace's efficiency or guarantee lower blower energy use. Performance depends on factors such as the furnace model, blower technology, ductwork design, system sizing, and installation.
Key Benefits of Upflow Furnaces
Choosing the right furnace configuration is critical for long-term comfort and energy savings. Here is why an upflow model might be the right fit for your home:
- Optimized for Overhead Ductwork: Because the supply air exits the top, upflow furnaces are commonly installed where supply ducts are routed above the furnace, including many basement and ground-floor furnace installations.
- Multiple Efficiency Options: Bryant offers upflow-capable furnaces with different efficiency levels. For example, the Evolution™ 98 987M offers up to 98.5% AFUE, while the Preferred™ 97 927T offers up to 97% AFUE. Actual efficiency depends on the specific model, size, and installation.
- Consistent Comfort: Bryant models such as the 987M use variable-speed airflow, while the 927T uses a variable 25-speed constant-torque ECM blower. These technologies can adjust airflow to system demands and support more consistent indoor comfort.
- Versatile Installation: Many Bryant furnaces use a multipoise cabinet design, allowing qualified installers to configure the furnace for different installation orientations. The specific installation options depend on the model.
Upflow vs. Downflow Furnace: Which Is Right for Your Home?
An upflow furnace pushes heated air upward and is commonly suited to homes with supply ductwork above the furnace, such as many basement installations. A downflow furnace sends warm air downward from the top and is commonly used where supply ductwork is located below the furnace, such as some crawl-space or slab-on-grade installations. A horizontal furnace can be used when the available installation space requires the furnace to be positioned on its side.
The right configuration depends on where the furnace is installed, the direction of the existing ductwork, available clearance, and the specific furnace model. A qualified HVAC contractor can assess your home's layout and determine the appropriate configuration.
Upflow Furnace Maintenance Tips
Keeping your upflow furnace running reliably and efficiently requires proactive care. These are the most important furnace maintenance steps to take:
- Check Filters Regularly: Replace or clean furnace filters according to the filter manufacturer's recommendations and your home's conditions to maintain proper airflow and indoor air quality Learn how often to change air filters.
- Inspect Ductwork: Ensure return and supply openings are clear of furniture or debris. Have a professional inspect and seal accessible duct leaks when needed to help maintain proper airflow.
- Professional Tune-Ups: Schedule annual furnace service as recommended by the manufacturer or your HVAC professional, inspect the heat exchanger, and test safety controls.
Connect With A Bryant Dealer On The Best Furnace For Your Home
A Bryant dealer can assess your home's layout and duct configuration to determine if an upflow furnace is the best furnace option for your home. They can review your specific heating requirements, explain model features such as AFUE ratings, heating stages, and blower technology, and guide you toward a solution that balances comfort with efficiency. Connect with a local Bryant dealer to get personalized recommendations and a quote for furnace cost.
Compare Bryant Furnaces
Choose a Bryant furnace for reliable, efficient heating that keeps your home comfortable throughout the winter. Known for their durability and advanced technology, Bryant furnaces offer quiet operation, precise temperature control, and energy-saving features like variable-speed motors and two-stage heating. With a range of models to suit different home sizes and needs, Bryant furnaces are built to last and come with industry-leading warranties, providing peace of mind and long-term value for your home heating system.
About The Author: Seth Faber serves as Product Manager for Residential Furnaces at Bryant, where he contributes to the development of heating solutions designed for dependable operation and lasting home comfort. His work takes into account homeowner needs, advances in energy efficiency, and evolving industry standards to help support reliable residential heating.
Learn More About Furnaces
- Explore what is a furnace
- Learn about furnace repair
- Explore furnace replacement
- Read our guide to furnace parts
- Learn how much is a new furnace
- Read our guide to high efficiency furnaces
Upflow Furnace FAQs
An upflow furnace is a heating unit that pulls cool air in from the bottom and releases warm air through the top, making it ideal for basements or lower-level installs.
In an upflow furnace setup, the supply ducts are located above the furnace, allowing heated air to flow upward into the home.
‘Updraft’ is another term for an upflow furnace. It works by pulling cool return air from the bottom, heating it across a heat exchanger, and using a blower to force the warm air upward into the home's supply ducts.
An upflow furnace pushes heated air upward, while a downflow furnace sends warm air downward from the top. The choice depends on where the furnace is installed and the direction your ductwork runs.
Upflow furnaces can be more energy-efficient in the right installation because they align with the natural tendency of heat to rise, which reduces strain on the blower motor. Bryant upflow models further improve efficiency with high AFUE ratings and variable-speed technology, which can meaningfully lower monthly energy bills over time.
Most gas furnaces, including upflow models, last between 15 and 20 years with proper maintenance. Annual professional tune-ups, regular filter changes, and prompt repairs are the most effective ways to maximize the lifespan of your upflow furnace.
An upflow furnace should be installed by a qualified HVAC professional. Installation requires proper gas, electrical, venting, and airflow setup to ensure safe and efficient operation. Professional installation also helps protect your equipment warranty and ensures the system meets local building codes.
An upflow furnace typically costs $4,000 to $8,000 or more to install, depending on the furnace efficiency rating, size, equipment features, and installation requirements. Costs may be higher for high-efficiency models, ductwork modifications, or upgrades to venting and electrical components. Learn more about furnace cost.
