Understanding Downflow Furnaces: A Comprehensive Guide

By Travis Baugh

A downflow furnace, sometimes known as a downdraft furnace, is a vital heating system that ensures your home remains warm and comfortable. In this detailed guide, we will delve into the workings of downflow furnaces, provide installation and maintenance advice, and highlight the energy efficiency and cost savings these systems offer.

One of the primary benefits of a downflow furnace is its ideal for attic installation or in some cases a closet on the main floor or garage.

How Do Downflow Furnaces Work?

Downflow furnaces draw in cool air from the top, heat the air and then force it downward, distributing the warm air through a network of ducts. Key components include the burner, heat exchanger, blower, and thermostat.

The burner ignites the fuel—be it natural gas, propane, or oil—while the heat exchanger transfers the generated heat to the passing air. The blower then pushes this warm air into the ductwork for even distribution throughout the house. The thermostat controls the temperature by signaling the furnace to activate or deactivate.

a carrier infinity downflow furnace installed in a basement

Frequently Asked Questions About Down Flow Furnaces

Which is better, upflow or downflow furnace?

The choice between an upflow and downflow furnace depends on your home’s layout and climate. Upflow furnaces, installed in basements or attics, can be more efficient in colder climates and better for multi-story homes. Downflow furnaces, better suited for homes without basements, provide even heating in single-story homes and fit well in closets or utility rooms. Consult your local Carrier dealer to determine the best option based on your specific needs.

Can you convert an upflow furnace to downflow?

It depends. Carrier does sell multipoise furnaces, meaning they are capable of being installed in upflow, downflow or even a horizontal orientation. Check with your local Carrier dealer to see if this is a viable option for your home.

Can you install a downflow furnace horizontally?

Yes, a downflow furnace can be installed horizontally if the furnace model is designed for horizontal installation. Furnaces are multi-poise, allowing for vertical (upflow or downflow) or horizontal configurations. Check the manufacturer’s specifications to ensure compatibility. Installation from a Carrier professional can ensure proper function and safety.

Energy Efficiency and Cost Savings For Down Flow Furnaces

Energy efficiency and cost savings are important factors when selecting a heating system for your home. The Annual Fuel Utilization Efficiency (AFUE) rating is a key measure of a furnace's efficiency, indicating the percentage of fuel converted into usable heat. The higher the AFUE rating, the more efficient the furnace. Carrier offers many furnaces with high AFUE ratings for energy-conscious homeowners.

High efficiency can translate into reduced energy consumption, which may lead to lower monthly heating bills. Additionally, the reduced energy usage means a lesser environmental impact, as fewer greenhouse gas emissions are produced. With Carrier's range of multipoise furnaces, you can be confident in investing in a heating system that prioritizes both your comfort and the environment. Contact your local Carrier dealer to learn which system is right for your home.

a carrier dealer stands next to an installed down flow furnace

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