Air Duct Cleaning and Disinfecting Reviews

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  • Author Gary Harstad
  • Published March 19, 2020
  • Word count 1,038

I've been a General Contractor for over 30 years, one thing that became clear to me through the many renovations I've done is was how dirty air ducts are. For example, we would be removing cabinets in a kitchen remodel, the vent under the sink would be disgusting. It's what prompted me to check into the duct cleaning business in Billings, MT. We researched to see what was out there and discovered an Oregon company called RamAir. I visited with the owner and inventor Dave many times to get as much information as I could. I was aware of the difficulty the brush systems had with getting deep into the system with all the 90-degree turns and screws every 3 to 4 feet. Plus the fact so many systems today are using the flexible ductwork that can be damaged with a brush system. With the RamAir System having the ability to get deep into an air duct with limited time and effort and would never harm flex duct, it made it an easy sell for me, and so we started Comet.

One of the first jobs we did was for a sportscaster from a TV station here in Billings. The first thing out of his mouth when he answered the door was "I think this is a total waste of time and money, but if you can satisfy my wife, please come in" I thought, well this should be interesting LOL. Once we got set up and were ready to begin, I asked him if he would like to come and see what we are getting out of his ducts. He was sitting at the dining room table working on his laptop, so he called for his wife and was standing next to me. I told Trei, my grandson, who had been working with me years working his way through college, "OK, let's get started." Trei turned on the pressure, entered the duct, and instantly, the debris-filled the clear dome that covers the vent and from there sucked into the vacuum. They were shocked to see all the dust and debris come out. With RamAir, you can see with your own eyes using the transparent doom system. Dave was telling me how this is a real WOW FACTOR, and was he ever right. Their home was immaculate, and when she saw this, she almost became ill, I had to settle her explaining how this is the dirty little secret lingering in every home, especially the older homes. Oh, and, by the way, he became a believer.

In four years, what we have seen coming out of these heat and cooling systems has been amazing. For example, we have found mice, feces, dirty diapers, lizards, dead birds, open cans of half-eaten sardines and salmon, petrified sandwiches, jewelry, money, just to mention a few. And if that doesn't spark interest and having yours cleaned, the dust that collects on your window seals, picture frames, TV, tables, and yes, your kitchen countertops are made mostly from DEAD HUMAN SKIN CELLS. Imagine, your house is filled with former bits of yourself along with everyone else who has lived in your home. Collecting in your system and is recycled every time it turns on. In one year, you shed more than 8 pounds of dead skin, and this dead skin is what feeds trillions of dust mites. Disgusting to think of all the year's people have been breathing the air coming from these vents. If people only knew.

A few years ago, Dave Hart from RamAir came up with a new invention, the SaniJet Disinfecting System. We quickly added this feature to our program. In the past, all we had to use to sanitize air vent systems were the fogger. The fogger would point at the opening of an air duct, and a mist would spray into the vent. Dave did a video using a clear, 6" round pipe, 20 ft long to compare the fogger and SanJet, The fogger would sanitize maybe 2 ft into the vent, that was all. With the SaniJet, we take our pressure hose and re-enter the vent after cleaning. Once we are back, deep into the vent, we switch to our SaniJet sprayer and spray a mist as we come back out of the system, completely coating the walls of the vent with even distribution, all-natural disinfectant "Benefect" certified for use in hospitals. We have a comparison Video

Using the SaniJet to disinfect your HVAC system took us some time to do as we would need to enter down every vent and return. Comet started with a charge of $35/ vent to disinfect. After a few weeks, I offered a special-deal, half price for a limited time. This offer did produce a lot of jobs, with each one, we were getting more and more efficient in the application. But the most amazing thing began to happen. I was receiving calls, getting 5-star reviews on how much this helped those who were suffering from asthma, allergies, sinus, and respiratory problems. The very first job we did with the sanitizing suffered from severe allergies and said that after we left, he had his puffers in his hand as he was ready to turn on the air conditioner. After turning it on, he was so pleasantly surprised he called me to tell me how wonderful it was to have his home as a sanctuary. From just, word of mouth from people who were so amazingly helped by our service produced so much work for us that today, we give sanitizing heat and cooling systems away.

We here at Comet have always felt we were significantly improving the indoor air quality in your homes, and this gives us a real purpose, but adding the SaniJet disinfecting system has taken it to a new level

After cleaning the ducts in hundreds of homes and many commercial buildings, I genuinely believe every home needs to have the heating systems, or cooling systems cleaned and disinfected to improve the air quality you breathe significantly. Think of what this does to your lungs, and your lungs are the FINAL FILTER.

Hope this little article will get you motivated and if you live in the Bozeman, MT, area Look us up,


Gary, President

If you’re looking for high quality and personal service in Bozeman and surrounding areas, you’ve come to the right place. At Comet Air Duct Cleaning, we’ll give you the attention and personal service you’ll come to expect and enjoy. For more information on Air duct cleaning, air duct disinfecting, whole building air purifiers, dryer vent cleaning visit our web site at

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Article comments

yosi · 4 months ago
thank you for the information