Heating Your Home: The Basics

Learn the basics about heat pumps and furnaces.
geothermal heat pump draws warmth from ground

geothermal heat pump draws warmth from ground

Figure D

Out of all the energy spent in and around your home, the central heating system accounts for more than one-third of it. This means you'll be spending a lot of time and money warming your home.

But before you can decide which system is best for your home, you'll need to know the basics.

Home Heating Basics

In general there are two common ways to heat your home using forced air from a centralized location:

  • One method is a gas furnace.
  • The second method is a heat pump.

A furnace warms your home by using either gas or electricity to generate heat that is then circulated throughout the house via a series of ducts and vents.

A heat pump differs from a furnace in that it doesn't generate heat. Instead it moves warm air from one place to another, usually from the outside of your home to the inside.

"Some of the factors in selecting which method of heating in a forced air system that you would use," Bill Rittlemann, project manager for IBACOS said, "would be to look at your access to utilities. Do you have gas service to your house? Is it inexpensive to bring it into the house? And then look at the cost of the energy itself."

Advantages for Both Heating Systems

Whether you choose a furnace or a heat pump for your heating system is up to you and your builder -- but both have advantages.

  • Gas Furnaces are extremely durable in all types of climate, and with an average lifespan of 20 years, they're a reliable option when it comes to warming your home.

    A common problem to look out for with furnace heating, however, is air leakage. Often aging air ducts will begin to leak, allowing substantial heat loss. Proper sizing, tight installation and equal distribution are vital to the efficiency of how duct work is designed to perform. The need to "maintain" heating ducts is something to keep in mind should you choose to purchase a forced air furnace.

    Note: A forced-air furnace is one that provides the heating in your house by blowing the air through the duct system. A furnace can be gas fired, electric fired or any other heat generating source.

  • Heat Pumps are another common way to heat your home. A heat pump is basically an air conditioner that works in reverse, which means instead of blowing cold air inside and warm air outside, it blows cold air outside and warm air inside.

There are two common varieties of heat pump you can purchase:

Air-Source Heat Pump -- Warms your home by moving air from one place to another.

Ground Source (Geothermal) Heat Pump -- Draws warmth from a different source -- the ground. Piping loops in the ground draw latent heat to the house in winter. A geothermal heat pump has a higher efficiency rating than most furnaces or air-source heat pumps, but it will cost a bit more to install because of the need to bore into the ground.

Which Heating System is Right for Your Home?

You now know the two most common ways to add centralized heat to your home, but which one is right for your home? The answer may depend upon where you live.

Although both heating systems can be used across the country, those in colder climates may want to consider a furnace or a geothermal heat pump. Both work well in sub-freezing temperatures because they draw heat from the relatively constant temperatures in the ground. Geothermal heat pumps are especially recommended for severe cold climates.

Keep Reading

Next Up

Radiant Floor Heating Basics

Alternative heating can include more than adding a fireplace or two or some space heaters. Radiant floor heating is an innovative heating method that works in an unusual way but is highly efficient.

The Basics of Air Conditioning

Shopping for a new HVAC system? Here are a few pointers to help you choose an air-conditioning unit based on efficiency, climate and noise.

Tips on Using Space Heaters

Space heaters can be very effective, but they have a bad reputation as fire hazards. Here are some tips for using portable heaters as a safe alternative to heating the entire house.

How Does Radiant Floor Heating Work?

Quiet, efficient, cost-effective radiant heat is the ultimate in comfy warmth.

Tips on Choosing a Shop Heater

Need a heater in the workshop? Use this expert advice to choose the right one for your space.

Gas Fireplace Basics

Gas fireplaces are a great way to add warmth and comfort to a space. Much like wall furnaces, gas fireplaces come on and off with a wall switch and can be controlled by a remote.

Workshop Heating and Ventilation

There are many options for installing heating and ventilation in a home workshop. These two features are key to creating a comfortable environment in a workspace.

Get to Know Your Home's Electrical System

If you're building or remodeling, check out this expert advice on planning your home's electrical system.

Warming Your Home: Alternative Options

Learn how to supplement your heating system in specific rooms to lend warmth and ambience.

HVAC: Home Tips

Use these maintenance tips to help keep your air conditioning unit running efficiently.

Get Social With Us

We love to DIY. You love to DIY. Let's get together.

Consult Our A-Z Guide

Everything You Need to Know

Browse a full list of topics found on the site, from accessories to mudrooms to wreaths.  

How-To Advice and Videos

Get video instructions about kitchens, bathrooms, remodeling, flooring, painting and more.

Watch DIY Downloads Now

Watch DIY Network LIVE

Don't miss your favorite shows in real time online.