Furnace Installation

How Much Space Should I Leave Open Around My Furnace?

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

Your furnace can get too hot if it doesn’t have enough clearance. It also makes it hard for our professionals to perform furnace repair.

Annual furnace maintenance is important to keep your system working smoothly. A regularly serviced furnace may work more efficiently, which could reduce your utility expenses.

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

Maintenance often helps us notice troubles before they become expensive. This could help lower future repair expenses and likely lengthen the life of your system.

So how much clearance should your furnace really have?

How Much Space Does My Furnace Need?

If you’re updating your basement or sealing off your furnace room, you should consult manufacturer directions and Napoleon laws for clearance rules.

As a general suggestion, your heater should be 30 inches away from furnace room walls on all sides. This permits our service experts to comfortably replace it.

You also need to make sure the area has plentiful airflow and ventilation, especially if you have an outdated furnace with a metal flue.

Related: Furnace Service or Furnace Replacement: What to Consider

This kind of furnace draws combustion air from the surrounding area. If there’s insufficient air, unsafe gas fumes and poisonous carbon monoxide could flow back into your home.

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

Unsure if your furnace or water heater has enough ventilation? We can assist you!

Contact us

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

Keep Combustible Materials Away from Your Furnace

Although furnace rooms function 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, situate your litter box elsewhere. Cat urine contains ammonia, which could deteriorate your furnace’s heat exchanger. Plus, the furnace could move the stinky odors around your home.

You should also regularly sweep near your furnace to block dust from developing.

Related: Is it Time for Furnace Service or Replacement?

Request Expert Furnace Service 

Whether you want furnace replacement or regular maintenance in Napoleon, Von Deylen Plumbing & Heating Inc. can expertly handle your needs. Our highly trained technicians can work on any HVAC model or brand.

Call us at 419-592-4756 or use our online scheduler to set up an appointment today.

Back To Blog