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two chimney sweepers on roof
Chimney Sweep on Roof at Sunset





National Fire Protection Association

The mission of NFPA is to reduce the worldwide burden of fire and other hazards by providing and advocating consensus codes & standards, research, training & education.

veteran owned small business

Veteran Owned

On Duty Chimney Service is proud to be owned and operated by a veteran.


If you need our chimney and masonry services, then you’ll be able to call on us for support throughout and around Worcester County. Some of the locations we offer chimney sweep services include:

  • Acton, MA

  • Ashburnham, MA

  • Auburn, MA

  • Ayer, MA

  • Chelmsford, MA

  • Clinton, MA

  • Concord, MA

  • Devens, MA

  • Gardner, MA

  • Groton, MA

  • Holden, MA

  • Hudson, MA

  • Leominster, MA

  • Littleton, MA

  • Lunenburg, MA

  • Marlborough, MA

  • Northborough, MA

  • Princeton, MA

  • Rutland, MA

  • Shrewsbury, MA

  • Sudbury, MA

  • Templeton, MA

  • Townsend, MA

  • West Boylston, MA

  • Westford, MA

  • Westminster, MA

  • Winchendon, MA

  • Worcester, MA

onduty chimney team salute


On Duty Chimney Service sweeps many different kinds of flues, including gas, wood, and pellet. Sweeping a chimney on an annual basis is your best protection for preventing chimney fires in your house. This will ensure safe and efficient operating conditions throughout your entire system. Creosote/pellet dust is a highly dangerous and flammable product that can create build-up in the venting system. Oil and gas flues must also be inspected and swept to allow proper venting throughout if needed. It can be good practice to remove the acidic oil/gas build-up from the flue, which can potentially deteriorate the inner lining of your masonry flue.

Our professional chimney company in Fitchburg, MA conducts all the repairs your chimney and venting systems need. This includes but is not limited to the repair and/or installation of the following (if something is not listed here, please call, and we can help accommodate your needs):

  • The Crown ( top of your chimney)

  • Cap installation (all stainless steel)

  • Stainless steel reline of all flues

  • Repoint and rebuilding of your masonry chimney

  • Water seal the entirety of the chimney

  • Flash seal

  • Lead repair

  • Cracked flue tile can be repaired while it is in place or removed and replaced with stainless steel liner or heat shield product.

  • Fireplace repair, which is a complete restoration of the entire system, including the flue and smoke chamber with our Heat shield products, will bring you long-lasting safety back into your home.

Inspections are another essential service that our chimney company in Fitchburg, MA, provides, which will catch potential issues that can turn into bigger problems when left unchecked. It is important to take these preventative measures to protect the integrity of the flue, and inspections should be conducted when purchasing a new home and on an annual basis to ensure safety. 


Not doing so can potentially lead to complete blockages of the flue, which will allow smoke, fire, and carbon monoxide to leak or pour into your home, creating an unsafe environment. We strive to conduct a 3 level NFPA inspection system to ensure the best results with the industry’s leading education and camera inspection system.

When your dryer is functioning poorly, then it is likely caused by a clogged dryer vent line. Lint and other common sources of dryer vent clogs can affect the efficiency of your dryer and can also be a serious fire hazard.


Our dryer vent cleaning services available throughout Worcester County and the surrounding area can remove the potential hazards from your dryer vent line and offer an array of other benefits pertaining to your dryer’s performance. After restoring proper airflow throughout your dryer vent line, drying time can be reduced, energy efficiency can be increased, and it will decrease wear on clothing and the dryer itself.

Our professional chimney company in Fitchburg, MA, sells some outstanding stove products! These new products include Pellet, Wood, and Gas stoves, which can include free-standing and inserts. All of the stainless steel relining or cast-in-place lining systems are standard and required with any new installation. We also have hearth pad options as well, which can be custom ordered to fit any area. We do it all at your one-stop shop for stoves!

If you are having trouble with your venting system, our chimney company for Fitchburg, MA, residents can help out in a variety of ways, such as:

  • Smoke pushing into the home from the woodstove or when you open the stove to load it.
  • Smoke coming in from the fireplace when you are using your wood stove on another floor.

  • Downdrafts are coming through.

  • Having a difficult time getting the fire started.

  • Wood placement and preparation.

  • Water is entering the fireplace, coming out in the basement, or leaking into the walls.

  • Your wood, gas, and pellet stove glass doors should not be covered in black soot, which are signs of poor venting.

  • Your venting system should never catch on fire!

  • Your pellet stove venting system shouldn’t be coating the home in black soot.

  • Your choice of pellet is a very important decision to avoid multiple cleanings in a week and system operation.

  • If your fireplace smells strange when it’s damp or raining, then we can fix that!


All of these issues are dealt with on a daily basis, and our chimney company near Fitchburg, MA, will be happy to help you through all of the problems we listed to make your heating and venting more enjoyable during the cold winter months and to keep you and your family safe at the same time all year long. Please contact our chimney sweep services, and we can help!

The National Fire Protection Association recommends sweeping your vent system each year to prevent chimney fires and venting system failures. Inspections should be performed even if the flue does not need to be swept to make certain nothing has changed since the last use. Water sealing your masonry chimney will prevent the water from absorbing into your bricks and freezing during the cold months. This may cause spaulding or break down of the face of the brick, which will begin to chip off the bricks. 


Crown sealing is a new product that creates almost a rubber-like masonry cover that can prevent the breakdown of the crown mortar, preventing cracks that might allow water to flow straight down into the home interior. A full stainless steel cap that covers the entire top of your chimney is highly recommended to keep out animals and prevent rain from deteriorating the crown and the interior of the flue. This cap will divert rain off the top of the chimney and to the ground, allowing it to run behind the siding or, much worse, into your home. 


Flash sealing is used to cover your lead flashing and is offered as a cheaper alternative to completely replacing your lead flashing (costly) in the event that your lead flashing needs to be repaired.

Professional Chimney Sweepers for Fitchburg, MA, Residents

When it comes to sweeping chimneys, you’ll want to place your trust in a team of professionals. Cleaning, installing, and repairing chimneys and fireplaces requires specific skills to perform correctly, and without them, could result in costly errors. That’s why, the next time you need chimney and fireplace services near Fitchburg, MA, On Duty Chimney Service has your back! 


On Duty Chimney Sweep was a very professional and knowledgeable. Cleaned chimney with state of the art equipment, but also had to remove remnants of a brush left by the last person who cleaned chimney (which caused a fire). Bryan inspected the chimney and advised me of its condition after the fire. He found no fire-related damage and gave a complete accounting of what residues and quantities thereof that he found inside the chimney -- invaluable information to those of us who heat with wood; it tells us how efficiently and safely our system has been running. He conducted what is a very messy trade in a meticulous manner, covering surfaces and cleaning up completely after each operation: chimney, flue, and cleanout trap.

John Smith - Ayer, MA

chimney sweep on roof with sunset


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