Canadian Indoor Solutions proudly provides the GTA area with quality and efficient heating and air conditioning service and installation.  All of our service and installation is done with careful detail from start to finish.  From American Standard Heating and Air Conditioning to Honeywell, we choose to use the highest quality and the most reliable products on the market.  Our technicians are consistently trained on any new product that arrive in today market.

Our highly trained technicians are there to answer any questions you may have and to service all your heating and air conditioning needs. 

We treat all of our customers as if they are a close family member.

About us


david in Mississauga
Service Work I had the pleasure of meeting Charlie when my furnace was giving me no heat. Charlie was very through and patient with his work and was even able to talk to him after company hours on his own time to ask him some questions about my furnace. He was very helpful and kind and gave me the feeling of being helped when I felt helpless. Thank you Charlie for your honesty and I would recommend him to anyone!

Very Satisfied
N in Bloor West
High Efficiency Furnace and Air Conditioner Dennis was referred to us by another customer and he definitely lived up to our expectations. Down-to-earth, straighforward manner. Always willing to give extra advice on other things related to the house. Very good pricing compared to the competition and it shows that Dennis is into establishing good longer term relations with his customers. Mike and Al were in to do the actual install, and it looked like they had a focus on doing the job right, instead of just trying to get in and out. Dennis came by a few weeks later just to make sure we were happy.

Alex in Toronto
A funny smell... I contacted Canadian Indoor Solutions last month because we were noticing a 'funny' smell in the house we had recently moved into. We had, had the ducts cleaned, plumbers had visited and we were in fact thinking about selling. Very frusturating. We wondered if perhaps it might be something wrong with the heater. Dennis was more than helpful on the phone, and offered to come out and take a look free of charge as he wasn't sure if he would find anything. He ended up finding a pipe that was leaking methane gas, extremely close to our heater (so dangerous!). I immediately went out and bought a VERY strong cap for it, and since then we have not had a smell. I thought it was very kind of him to come out and do some detective work and even take a look at a vent that needs repair. We highly recommend this company, and will certainly use in the future and will recommend to friends and family. Thanks so much!!!

Tired of inflated prices from big companies...
May in North York
Air conditioner installation and high efficiency furnace installation I met Dennis in June 2005 when he installed my A/C. The large company that I had faithfully contracted for yearly spring and fall maintenance had quoted over $1000 higher. Dennis was punctual, courteous and did an extremely professional installation. He informed me that a properly installed A/C didn't need a spring check-up and only a yearly furnace check which included the A/C was essential. Dennis advised he used to be the lead technician for a large heating/cooling company...he branched out into his own business because he was tired of large company bureaucracy and customers being charged inflated prices for unnecessary work.
Five years in and my A/C is running perfectly and no inflated spring maintenance fees! Dennis also recently installed my new high efficiency furnace and once again, his work and pricing was exceptional. I have recommended him to many of my friends and family. When you are tired of paying inflated prices to big companies and the fear-mongering marketing of their maintenance contracts, call Dennis!

Snezana in Mississauga
Changing Air Conditioner Dennis was a wonderful person to deal with. His service was exceptional, and his prices are competitive. Most of all he is very knowledgable, and give great advise!
Thank you for everything

Dennis was a pleasure to deal with!
paul walther in Mississauga
furnace and a/c install A colleague recommended Canadian Indoor Solutions to me back in 2007 when it was time for a new furnace and A/C. I was delighted with the service I received and since then have reffered them many times to my clients.

Paul Walther
Royal LePage Kingsbury Realty
905 568 2121
Dennis and his crew were great!
Josh & Debbie in mississauga
Furnace and barbacue gas line Dennis and his crew were very professional and did a great job with my installations. They left no mess for me to clean up and did a clean and neat installation job. Would recomend them to any of my friends. Thanks guys!!

Amazing Job
Jazmin in Mississauga
A/C install I had the pleasure of being reffered to Canadian Indoor Solutions through a friend, I had a couple of quotes and every company that came out said that the way I wanted A/C installed couldn't be done. Dennis came out to review the job and acknowledged the difficultly of the job, due to a finished basement, but said it was possible. He told me how he was to run the piping, and they installed it just the way he said. I was so impressed, I thought I was going to have to cut holes in the ceiling but Dennis and his team really did the job with such professionalism! Great Job guys!!

God Bless Dennis @ Canadian Indoor Solutions.
jackie in Mississauga
Furnace, humidefier, Accuclean I met Dennis in December 2009 as he was the only person that pulled over and helped get my vehicle out of a snow bank at a major intersection. He gave me his business card and told me he owned a heating and air conditioning company. I decided to call him in March for a quote on a furnace after Direct Energy came to my house for a furnace cleaning and noticed the heat exchanger had cracked. He spent a good couple of hours explaining to me how the complete heating and air system works. I decided to use his company and I am very glad I did (and so is my husband). We are extremely comfortable with quiet American Standard furnace and Acculean (it cleans the air in our home 99.999999999999%). I would recommend Canadian Indoor Solutions to everyone and anyone. :)



Positive and satisfying experience; high quality service
Sam in Mississauga
Furnace installation and service I have been referred to Dennis and Canadian Indoor Solutions few years ago, for a furnace replacement and an A/C service job. From the first contact, I was extremely pleased with the professionalism and the high quality work Dennis and his guys have shown. I have been so happy with their services that I have been using Dennis and his company for any work I need at my home, as well as at the several rental properties I own, ever since.
Aside from being a truly nice and decent person, Dennis is very knowledgeable and very reliable, which is extremely important for anyone in the real estate/rental business. He even showed up for an emergency fix at my place just few hours before his vacation trip, which is so rare when you are dealing with contractors and serviceman.
I am wholeheartedly recommending Canadian Indoor Solutions to anyone who is looking for a reliable, knowledgeable contractor, who will make the whole service experience positive and satisfying.

Another Well-deserved 10!
check furnace/ac; replace chimney liner The company that installed our new forced air heating/ac system went out of business. Therefore, when I had to find a new person to attend to the American Standard electronic air cleaner that was functioning improperly, American Standard referred me to Dennis at Canadian Indoor Solutions. I check his ratings here on Homestars and was so pleased that I called immediately.

Dennis came promptly as we had arranged. After his inspection, he told me that the malfunctioning electronic cleaner was not grounded. He repaired it and it has worked well since.

Dennis also told me that our chimney needed a new liner due to the changes from our old boiler system to forced air. Doing so would make our heating system “according to code.” We agreed to have Dennis do the work, which he did.

What impressed me about Dennis was his expertise, promptness, courtesy, cooperativeness, and reasonable price. I’ve kept his card and will have him do our next year’s inspection. Thank you very much, Dennis. You deserve these ratings
Canadian Indoor Solutions - Very Satisfied
Omar in Thornhill
Heater/Furnace Replacement After consulting with a couple of other heating and air conditioning companies I happened to stumble upon this web site which led me to Canadian Indoor Solutions. Upon contacting this organization I had the pleasure of meeting Dennis Nejasmic the technician/owner who was both courteous and professional.

I don’t normally write reviews; however, after the success that I gained I just couldn’t help myself…
The price to replace my furnace was extremely fair
The timeliness and willing to work around my schedule was a huge plus
Customer service was great
Overall I would rate the experience 10 out of 10 and would recommend this company
Couldnt be happier !
Jim P, Oakville
Furnace upgrade All i have to say is WOW! I cant describe how impressed i was with the quality of work and service provided by CIS. Dennis really out did himself as a professional in the heating and AC industry. He was recommended by a friend of mine who found his company listed on the internet and i see why my friend spoke so highly of his work. The friendliness and honesty really shows. Not to mention the great job and reasonable price! I will definitely be recommending to my friends! Thanks again!
Top notch all the way! 5+ STARS
Dave Cicero
Complete Furnace & AC system upgrade/install I dont normally write reviews after purchasing a product or service but i have to give recognition to Dennis and his crew at Canadian Indoor Solutions for the amazing job they did on my home. The service, price & overall quality from start to finish didnt just meet my expectations but exceeded them! After meeting Dennis & discovering the many years of experience he has, made me feel confident that i made the right choice and based on the workmanship & professionalism provided, surely i did. Canadian Indoor solutions without a doubt is your one stop shop for quality work backed by honesty & friendly service! Great job guys
Thank you Dennis!
Larry in Markham
furnace and a/c installation Dennis took the time to explain to us the product differences and the cost benefits of going with one product vs the other. Once we made our choice, he committed to a date and did the installation as agreed. He and his team showed up and provided the professional service we had expected.

Quality and professionalism
Anita Heleno
Installing a gas firplace and customer mantle Dennis installed a brand new furnace and air conditioner in our Burlington home. He was so professional and the job he and his team completed was fantastic. When we wanted to install a fireplace months later, we called him and he installed our gas firplace and custom built the mantle. Professional, courteous, efficient and quality workmanship reflected the jobs he completed. I cannot tell you how many compliments we had on the beuatiful mantle job he did. We actually used Dennis and his company again when we moved to Mississauga to install a new air conditioner as well.

Dennis (Owner)Canadian Indoor Solutions
R. Perrotta Mississauga
Repair and replacement of furnace components We had the good fortune to be referred to Dennis when we had serious problems with a recent furnace installation (done by another dealer) Dennis was referred to us as the "best technician around" to handle our situation. He not only fixed the problems, he did it with efficiency and good manners. He walked us through various operational functions of our furnace that we otherwise would not have been familiar with. This guy looks young for his years and you may think he's new to the busines, but you would be wrong. He has a wealth of experience and expertise behind him. He's been doing this type of work most of his life and is called upon by major furnace/air conditioning companies to trouble shoot problems. I happily give Dennis a 10 our of 10. R. Perrotta

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