Furnace Installation

How Much Space Should I Leave Open Around My Furnace?

Natural gas furnaces need sufficient space and airflow to work properly.

Your furnace can overheat if it doesn’t have enough clearance. It also makes it difficult for our specialists to perform furnace repair.

Annual furnace maintenance is essential to keep your unit operating well. A routinely serviced furnace may heat more efficiently, which could lower your utility expenses.

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

Maintenance often helps us spot troubles before they start. This could help lower future repair costs and likely extend the life of your system.

So how much area should your system really have?

How Much Space Does My Furnace Need?

If you’re finishing your basement or sealing off your furnace room, you should take a look at manufacturer specifications and Huntsville statutes for clearance requirements.

As a general recommendation, your furnace should be 30 inches away from furnace room walls on all sides. This allows our service technicians to comfortably replace it.

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

Related: Furnace Service or Furnace Replacement: What to Consider

This model of furnace draws combustion air from the adjacent location. If there’s not enough air, dangerous gas fumes and deadly carbon monoxide could back draft into your home.

If your furnace is positioned in a small room with a gas water heater, you may need to put in extra openings. This could include 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 think about airflow and ventilation as much if you have a modern, high-efficiency furnace with PVC piping. Your furnace uses one pipe as an exhaust vent and the other to pull in air.

Keep Combustible Materials Away from Your Furnace

Although furnace rooms are often also used for laundry and storage space, you should keep yours free of clutter 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 corrode your furnace’s heat exchanger. Plus, the furnace could circulate the smelly odors all over your home.

You should also regularly vacuum around your furnace to block dust from building up.

Related: Is it Time for Furnace Service or Replacement?

Request Expert Furnace Service 

Whether you have to have furnace replacement or routine maintenance in Huntsville, All Weather Heating & Air Conditioning Inc can expertly handle your needs. Our highly trained technicians can repair any furnace model or brand.

Call us at 256-801-4701 or use our online scheduler to request an appointment today.

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