How Much Space Should I Leave Open Around My Furnace?

November 05, 2019

Natural gas furnaces need adequate space and airflow to run right.

Your furnace can get too hot if it doesn’t have enough room. It also makes it difficult for our specialists to complete furnace repair.

Routine furnace maintenance is important to keep your unit working well. A routinely serviced furnace may heat more efficiently, which could lower your utility costs.

Related: How Does Furnace Maintenance Impact the Energy Efficiency of Your Home?

Maintenance often helps us discover troubles before they begin. This could help reduce future repair bills and potentially lengthen the life of your unit.

So how much room should your furnace really have?

How Much Space Does My Furnace Need?

If you’re finishing your basement or closing off your furnace room, you should consult manufacturer instructions and Huntingburg laws for clearance rules.

As a general rule of thumb, your furnace should be 30 inches away from furnace room walls on all sides. This permits our service professionals to easily work on it.

You also need to ensure the room has enough airflow and ventilation, especially if you have an outdated furnace with a metal flue.

Related: Furnace Service or Furnace Replacement: What to Consider

This model of furnace needs combustion air from the nearby area. If there’s insufficient air, dangerous gas fumes and toxic carbon monoxide could back draft into your home.

If your furnace is placed in a small room with a gas water heater, you may need to put in extra openings. This could involve a fully louvered door or vents in the walls.

Not sure if your furnace or water heater has enough ventilation? We can assist you!

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You don’t need to assess airflow and ventilation as much if you have a up-to-date, high-efficiency furnace with PVC piping. Your system uses one pipe as an exhaust vent and the other to draw in air.

Keep Combustible Materials Away from Your Furnace

Although furnace rooms double as laundry and storage space, you should keep yours free of items that could be fire hazards.

This includes:

  • Clotheslines
  • Cleaning or laundry products
  • Gasoline, paint or paint thinner
  • Rags and papers
  • Wood scraps and sawdust
  • Used filters

If you have a cat, put your litter box somewhere else. Cat urine contains ammonia, which could corrode your furnace’s heat exchanger. Plus, the furnace could spread the smelly odors throughout your home.

You should also regularly sweep by your furnace to stop dust from accumulating.

Related: Is it Time for Furnace Service or Replacement?

Request Expert Furnace Service 

Whether you want furnace replacement or routine maintenance in Huntingburg, Dearing's Service & Solutions can expertly meet your needs. Our highly trained technicians can fix any furnace model or brand.

Call us at 812-200-5844 or use our online scheduler to get an appointment now.