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Why Is It Better To Leave Enough Space Around A Furnace?

Why Is It Better To Leave Enough Space Around A Furnace?

For proper operation, furnaces need to have enough room and airflow. If the system doesn’t have enough clearance, it could overheat. But don’t worry! Everything you need to know about giving your furnace the space it requires has all been prepared by us.

Each municipality sets forth specifications for furnace rooms in terms of both size and safety. In general, it is advised that all edges of your furniture should be at least 30 inches from the walls. This guarantees quick access to the system as well as optimum ventilation.

The comfort and optimal performance of your furnace will be yours to enjoy with your family thanks to this article. We’ll also look at a number of subjects related to furnace kinds, features, recommendations, and safety.

What Are The Furnace Room Building Requirements?

Different places have different building regulations. The general rules you should be aware of are as follows:

Required Furnace Room Clearance

Your heating system and the surrounding walls should be separated by at least 30 inches. The lack of airflow may cause the furnace to shut off early if the space is too small and the walls are too close together.

Insufficient room will also make it difficult for you and maintenance personnel to access the furnace.

Ventilation In The Furnace Room

Why Is It Better To Leave Enough Space Around A Furnace?

A reliable and sufficient ventilation system enables air intake for proper combustion and exhaust for the release of harmful gases like carbon monoxide (CO).

Your family is shielded from probable fire and chemical exposure by this feature. Your furnace should have two vents, each measuring 12 square inches, one on the floor and one on the ceiling.

Requirements For Walls And Ceilings

Never completely enclose or seal off your furnace room without enough ventilation. Bricks and concrete are the ideal materials to use when constructing walls around your furnace since they offer superior protection and insulation.

Furnace System Energy Requirements

The annual fuel usage efficiency, or AFUE rating, of your furnace must also fulfill the minimum efficiency standard. The majority of states mandate an efficiency level of 80%. In the section after this, we’ll examine this in greater detail.

What Qualifies As A Good Furnace?

You should be aware that there are a number of factors to take into account whether you already own a furnace or are planning to build one.

1. Annual Fuel Utilization Efficiency (AFUE)

The amount of heat generated compared to the cost of fuel consumed is known as the AFUE ratio.

An 80 rating indicates that 80% of the fuel used by the system is converted to usable heat, with the other 20% being lost to inefficient burners, leaks, and other inefficiencies. A furnace is deemed high-efficiency if it has a rating of 90 or better.

Higher-rated furnaces inevitably cost more. However, longer-term fuel savings come from furnaces with higher energy efficiency.

2. Furnace Load

Calculating your home’s heating load will help you choose the right type and size of furnace. This word refers to the amount of effort needed to heat your furnace. For this activity, it is recommended to speak with an HVAC expert to determine your household’s wants precisely.

3. BTU Volume

Furnaces are evaluated in terms of BTU output or capacity since home heating needs vary. It is an acronym for British Thermal Unit and represents the amount of energy required to heat your home for a given period of time.

An ordinary 2,000 square foot home will require between 80,000 and 115,000 BTUs, whereas a tiny home, for example, with an area of 800 to 900 square feet, is advised to use between 30,000 and 45,000 BTUs.

4. Warranty

Furnace systems are an additional investment for your property because they are relatively pricey. Knowing the terms of your warranty would be good.

For new heating equipment, there are three main categories of furnace warranties.

Manufacturer’s Warranty On Furnaces

The maker of your heating system provides this type of warranty. This warranty typically covers any significant unit components with manufacturing flaws and broken parts.

Because unit replacement and free furnace repairs are not included in a manufacturer’s warranty, it has limited coverage.

Warranties For Furnace Installation

These guarantees, which essentially cover the complete heating system, are particularly provided by the contractor who installed your furnace.

The manufacturer will provide a parts replacement if the device developed a malfunction or if any components were harmed during installation.

An installation warranty often only lasts a year, but every HVAC company has their own requirements.

Extended Warranties For Furnaces

Your Manufacturer’s Warranty is explicitly extended by extended warranties. You have the choice to add more years, even if your current contract only lasts for ten years.

This coverage must be acquired separately and is not part of the furnace’s purchasing price.

What Safety Advice Should You Follow If You Have A Furnace Room?

Now that the fundamental architectural guidelines for furnace rooms have been established, let’s look more closely at how to make them secure for your family and household.

Ventilation And Room

To ensure proper air circulation, you should make sure your furnace room has enough space for ventilation and maintenance tasks, and that the intakes and vents are not blocked.

It’s crucial to keep in mind that no objects, including furniture, should come into touch with the furnace.

Storage Safety Measures

As much as possible, avoid using the furnace room as a storage place. Kitty litter, cleaning and laundry supplies, and boxes or suitcases are a few things you shouldn’t keep in the mentioned room.

It is found in cat litter. This chemical can ignite and explode when exposed to extreme heat.

Considerations For Lighting

Avoid stepping around your furnace in an emergency if there are burnt lightbulbs or poor lighting conditions. Change these out for fresh ones, and keep a flashlight nearby at all times in case of a blackout.


Why Is It Better To Leave Enough Space Around A Furnace?

To ensure your safety and the safety of your family, maintenance should always come first.

Always check your appliance for any rust spots and odd noises, since these could be symptoms of problems that require prompt attention and repair. In order to ensure peak performance, it is also recommended to replace your furnace filters frequently.

Additional Safety Measures

  • The flooring must to be clean and dry.
  • Never store gasoline, paint, or paint thinners close to your furnace because they can catch fire.
  • Laundry drying in the furnace room is not recommended because it restricts airflow and presents a significant fire risk.

What Kinds Of Furnaces Are There?

Why Is It Better To Leave Enough Space Around A Furnace?

Natural Gas

A gas furnace uses natural gas to operate, as the name suggests. Due to technological advancement, this kind of heating system currently has the highest efficiency level, with an AFUE rating of up to 98%.


Instead of using gas, this type of furnace burns oil. The disadvantage of adopting this type of heating system is a lower AFUE rating (between 80% and 90%), but the upfront cost is substantially lower than Natural Gas.

Electric Furnaces

Electric furnaces require energy to run. They are the least expensive options available, and they are also simpler to install. Your electric bills will rise, though, as electricity is now much more expensive than gas.


This type of furnace is fuelled by propane, a byproduct of both gas and oil production. If other power sources are not accessible or available in your location, this device transforms liquid propane into gas and is a great backup option.

Wrapping Up

Significant home appliances include fireplaces. To protect you and your family’s safety while installing one, there are a number of precautions that must be taken.

Now that you are more knowledgeable, you can position your furnace safely and effectively. We’ve also observed additional pointers for maintaining the state of your furnace room and several furnace warranty options.

Why Is It Better To Leave Enough Space Around A Furnace?

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Written by HVAC Contributor

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