A furnace is a whole-home heating solution that burns fuel, like natural gas or propane, to generate heat, which is distributed via ductwork.

What is a Furnace?

A furnace is a central heating system component that provides warm air throughout a home, distributing it via ductwork. Most commonly powered by natural gas, furnaces are a key part of residential HVAC systems.

How Does a Furnace Work?

In a gas furnace, natural gas is ignited in the burner, heating the heat exchanger. As air passes over the exchanger, it warms up, and a blower sends the heated air through the home’s ductwork. This process provides consistent and controlled warmth.

Energy-Saving Features

When selecting a furnace, energy efficiency is essential:

• AFUE (Annual Fuel Utilization Efficiency): Measures furnace efficiency; higher AFUE ratings indicate better efficiency.
• Heating Stages: Multi-stage furnaces adjust power to maintain temperatures efficiently, while single-stage furnaces operate at full power.
• ENERGY STAR® Certification: Indicates the furnace meets high energy efficiency standards.

Types of Furnaces

• Gas Furnace: More energy-efficient, with an AFUE rating between 89% to 98%, but typically has a higher initial cost.
• Oil Furnace: Lower upfront cost but less efficient, with an AFUE rating around 80% to 90%. Oil is also more expensive than natural gas.

Furnace Maintenance Tips

• Install your furnace with a trained HVAC technician to prevent installation-related issues.
• Schedule servicing before the heating season.
• Change air filters regularly for optimal performance.

When to Repair or Replace a Furnace

Consider replacing your furnace if:

• It’s over 10 years old
• It has an AFUE rating of 80% or lower
• Frequent breakdowns are occurring
• Energy bills are rising unexpectedly

Cost of a New Furnace

Furnace costs depend on location, unit type, home size, and installation complexity. Consult our HVAC specialist to get a customized quote for your home.