Do Gas Fireplace Chimneys Need To Be Cleaned? Things You Need To Know & Consider

Although Gas fireplaces do not produce byproducts as wood fireplaces and utilize clean-burning gas like propane or natural gas fuels, Gas fireplaces still need chimneys to be cleaned.

But the question is why?

Because Gas Fireplaces deposit corrosive substances inside the unit, which can wreak mayhem, cleaning the chimney helps to identify growing visible danger such as carbon monoxide poisoning in advance so that you can fix the issue before it turns worse.

In today’s article, I will be discussing things you should know and consider regarding your gas fireplace chimney cleaning.

Why Do Gas Fireplace Chimneys Need To Be Cleaned?

Many homeowners often ask why exactly they need to clean their Gas fireplace chimney when it does not burn woods to run and does not produce Ashes or Creosote

The main reason behind scheduled or routine chimney cleaning is to ensure that your gas fireplace is working efficiently. Regular inspections also help notice potential problems earlier and save you from performing costly repair and maintenance later on.

Therefore, let me help you to understand why experts highly recommend and emphasize cleaning the chimney of the Gas fireplaces-

To Prevent Incomplete Combustion:

The Gas fireplace chimney allows combustion byproducts to escape passively up the flue and produces a draft to draw combustion air into the unit.

Therefore, if your gas fireplace chimney has turned too cold to produce a sufficient draft, it will fail to provide enough combustion air.

As a result, the generated weak draft signal will hinder its efficiency, and incomplete combustion will produce carbon monoxide, which cannot be drained safely from the chimney.

Scheduled chimney inspection and cleaning can help to handle such trouble earlier.

Fixing The Internal Condensation Issue:

Water vapor condensation inside the gas fireplace chimney is a common problem, which occurs inside the chimney’s cooler flue because the modern gas fireplaces embezzle the extra heat.

These buildup water particles are highly acidic and corrosive. To prevent further damage, one should sweep the fireplace chimney to fix the condensation issue.

Prevent Burners, Gas Logs & Pilot Light Troubles:

If you use the gas fireplace regularly, the internal burners and artificial gas logs can easily become dirty or clogged. If the gas burners get dirty or clogged, they will deliver poor performance, and the same thing happens with dirty or broken-down artificial gas logs.

Eventually, the pilot light can fail to turn on due to building up moisture on the capped pipe. So immediately drain the moisture to restore Pilot lights functionality. These issues can be easily detectable during scheduled chimney inspections and sweeping.

Maximizing Gas Fireplace Efficiency:

Generally, propane or natural gas tends to leave residues. Since the fireplace unit sucks in the indoor air, pet or animal hair, dander, and other debris can easily enter to clog the active internal holes or lines.

That results in poor performance from main components like burner and artificial logs. Routinely chimney inspections and sweeps maximize your gas fireplace working efficiency.

Detecting Gas Leak:

Routinely checking and inspecting your gas fireplace during chimney cleaning can help detect any presence of gas leaks.

As soon you notice raw gas smell, immediately contact the gas company to inspect further and repair the gas lines, if needed.

How Often Do You Need To Clean Your Gas Fireplace Chimney?

According to the National Fire Protection Association or NFPA recommendation, all Gas fireplace chimneys should be inspected and cleaned at least once a year or annually.

However, they also recommend cleaning the gas fireplaces monthly even if you have not used your gas fireplace heavily. It is for better efficiency of your gas fireplace unit’s working flow.

How Much Does It Cost to Clean a Gas Fireplace Chimney?

For gas fireplace Chimney cleaning, the cost will be around $75 up to $100. But the additional charges of professional cleaning will vary depending on the condition, type of inspection, repairing level, and the local rate of service.

What Are The Materials & Tools Required To Clean Your Gas Fireplace Chimney?

To make your task easier, I am listing out all required materials and tools for cleaning the Gas fireplace chimney here-

Required MaterialsRequired Tools
Chimney BrushesExtension Climbing Ladder
Plastic SheetCordless Drill with Screwdriver Bit
Painter Or Duct TapeVacuum With Dust Filter
Dust Or Protective Mask Flashlight
Safety Goggles Or Glasses 
Fiberglass Extension Rods

How To Clean Your Gas Fireplace Chimney?

Kindly, follow all the steps thoroughly to get the best result-   

Step: 1

First, fully open the fireplace damper from downstairs and cut off a 6ft long 4ft wide section of sheet plastic. Now tape the sheet on the floor in front of your gas fireplace and securely seal it with duct or painter’s tape.

Next, cut off another plastic sheet just like the previous one but make sure this plastic sheet is at least 12 inches longer and wider than the entrance of your Gas fireplace.

Then, tape it over your fireplace and seal it against the debris.

Step: 2

Now, Set the extension ladder securely to reach and get access to the roof and also, bring out all your Chimney cleaning tools up to the house roof.

Ensure the roof is fully dry, and you have an assistant to hold the ladder while you climb it. Also, do not forget to bring out the cordless drill, dust, or protective mask and goggles.

Step: 3

Start the cleaning task by accessing the chimney flue and using the cordless drill to turn the screws out to remove the chimney caps.

Then, after determining the height of your chimney flue, attach the chimney brush to the first fiberglass extension rod. Also, keep additional rods nearby so that you can add up as required.

Step: 4

With one rod attached to the brush, start scrubbing the chimney from the top and slowly progress downwards.

Keep scrubbing until you reach the first rod’s end and when you reach the end of your first rod, securely screw the next rod onto the first one’s end to continue scrubbing downwards.

Continue adding more rods to scrub further until you reach the smoke shelf.

Step: 5

Now you need to remove the cleaning brush in slow motion, and while pulling the rod assembly, lightly scrub up and down.

After reaching the joining point, remove the rod and observe into the chimney with a torch or flashlight whether you have missed any spot or not.

Repeat the scrubbing process if you have left any spots.

Step: 6

The next task is to replace the chimney caps and come down from the roof. Be careful while you are climbing down the ladder. Then, wait around 10 minutes at your fireplace area so that the dust and debris can settle.

After 10 minutes, carefully roll up the fireplace opening plastic coverings to enclose any stuck dust, and discard the plastic.

Now use the small chimney cleaning brush to clean up all visible areas and use the vacuum machine to such up all debris.

When done, remove all the tools away and roll up the floor’s plastic coverings to enclose all fallen debris. Lastly, discard the plastic sheet.

Step: 7

Technically, your chimney sweeping or cleaning task is done, and now, ensure proper sandy creosote deposits disposal by following your local waste disposal rules and regulations.

If you are not the do-it-yourself type, I highly recommend taking professional help, and The Best Chimney Cleaning Services of 2022 article can guide you to choose the best certified professional service around your area.


It seems like many Gas fireplace owners are still not aware of why do gas fireplace chimneys need to be cleaned.

Hopefully, after reading this article, all Gas fireplace owners will understand the necessity of cleaning the Chimneys.

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