We Keep
Your Home
Cooler Warmer Cleaner Comfortable
Year Round

#1 Heating & Cooling Contractor #1 in Furnace Repair & Maintenance #1 Gas Fitting & Piping Contractor #1 Fireplace & Gas Stove Installer

DNM Heating & Cooling

Who We Are

Locally Owned & Operated

Hometown experts with your best interests in mind

Professional heating and cooling installation and repair company, offering premier products and service to Sault Ste. Marie and the extended Algoma District. Our friendly, neighbourhood Comfort Advisors are here to assist you with your HVAC needs and to answer any questions you may have.

Your Local HVAC Experts

We make homes comfortable.

Our Services


Gas & Electric, Duct & Ductless


Keep The Heat Outside

emergency services

We're Always On Call


Comprehensive Service Packages

We make homes comfortable.

Our Services

Air Conditioners

Cool Comfort All Summer Long

We expertly install and maintain high-performance air conditioning systems to ensure your indoor comfort, especially during hot weather.

Heat Pumps

Efficient Heating & Cooling Year-Round

Versatile units that provide both heating and cooling by transferring heat between the indoors and outdoors.


Reliable Warmth When You Need It

We install gas furnaces for consistent, efficient heating, using natural gas to produce and distribute warm air seamlessly throughout your home.

Ductless Systems

Targeted Comfort Without Ducts

Ideal for spaces lacking ductwork, our ductless systems offer flexible and energy-efficient heating and cooling solutions.

water heaters

Endless Hot Water Supply

We install high-efficiency water heaters, including tankless, electric, and gas models, ensuring you always have hot water.


Efficient Radiant Heat Systems

DNM specializes in the installation and maintenance of boilers, ideal for homes and buildings with radiators or underfloor heating systems.

Duct Cleaning

Breathe Cleaner, Fresher Air.

Improve your air quality and system efficiency with The Duct Truck™, which remove dust, debris, and allergens from circulating in your home.


Optimal Airflow, Superior Comfort

We offer professional ductwork installation and repair services to ensure optimal airflow and comfort in every room of your home.


Extend Life, Enhance Performance

Choose our award-winning maintenance services to enhance the performance of your heating and cooling systems, prevent breakdowns, and extend their lifespan.


Warmth and Ambiance for Your Home

We install and service a variety of fireplaces – both electric and gas – offering both aesthetic appeal and functional warmth to enhance your living space.


Perfect Grilling Every Time

We sell and install premium Napoleon grills and provide professional barbecue setup and maintenance services, ensuring you have the perfect grilling experience every time.


Professional Solutions for Businesses

We offer specialized heating and cooling solutions for commercial settings, ensuring optimal performance and efficiency for businesses.

What People Are Saying

Real customer experiences from your community.

Read More
Steve is an amazing salesman. Absolutely 10/10 if you are in the market Steve is your guy! Made sure we got the best bang for our buck. Made everything so easy. Can’t wait to deal with him for heat pumps in a few months. Norm installed and as you can see, it’s so clean and neat. Made sure we actually understood our system and how to make it work best for our home! Cannot thank them enough. We are so pleased!
Read More
Excellent response time for my emergency furnace repair. No run around, fast call back after hours and spoke with the repair person within minutes. He had the part replaced and furnace back on within 20 minutes of arrival. Exceeded my expectations in every way!! Definitely recommend.
Read More
Overall experience was excellent Steve was very thorough during the initial walk through. Appointment was booked and the guys showed up as scheduled. Norm and Nick did a great job on the install. Norm was very informative on the heat pump being installed and presentation looks excellent. Happy with the service, keep up the good work fellas.
Read More
You guys helped my sick friend and her man. You guys are the sweethearts. I will recommend you to everyone that needs help in plumbing and heat. Thank you guys for taking care of our friends while she was sick and her man was at work. God bless you and your company and your staff. Thank you a million times over for being such wonderful people.
Read More
There isn't enough room to say everything that is great about this company but here goes....very professional, very respectful of your home and property, amazing employees, amazing work. Top notch equipment, so easy to talk to someone and the staff is very knowledgeable. I have had duct cleaning, dryer pipes cleaned, furnace cleaned. All amazing. Thanks DNM for being an amazing company but a special thanks to the employee's who make this company the best!
Read More
Prompt service, quality and quiet appliances,respectful serviceman about cleanliness also take time to explain asked questions. Also very friendly staff makes you fell at ease. Best of all sales will let you decide after properly thinking about your purchase. Not pushy people.
Read More
Awesome experience with DNM for duct cleaning done at my home. It was a pretty clean, quiet and pleasant experience for those 2-3 hrs spent doing the duct cleaning and getting my questions answered was much easier. Super friendly people and I do recommend using DNM for your next duct cleaning. 10/10.
Read More
We purchased a napoleon bbq from them just before Christmas. Quote and responses on email were answered very quickly. Had unit assembled and it arrived last day before Christmas. Even though the office closed early, service told me they would stay until our son got off work with his truck to pick up. Staff was extremely friendly. Would definitely recommend DNM!!

Why DNM?

Three simple reasons.


With decades of combined experienced serving the Sault, our team brings a deep understanding of heating and cooling systems in our climate. Our seasoned technicians are equipped with the knowledge to handle installations, maintenance, and repairs with precision and the latest technology in the HVAC industry. We ensure that every system we work on is optimized for efficiency and reliability.


At DNM Heating & Cooling, we are committed to upholding the highest standards of integrity. We build trust with our clients through clear communication, ethical business practices, and a steadfast commitment to their interests. From honest diagnostics to fair pricing, our primary goal is to provide you with the best possible service and ensure your HVAC needs are met with the utmost professionalism.


Transparency is at the core of all our interactions. DNM offers straightforward pricing with no hidden fees. We provide clear, detailed quotes, without pushy sales tactics, keeping you well-informed throughout the entire process. This clarity allows you to plan and budget with confidence, ensuring a seamless and stress-free experience from initial contact to project completion.


Visit the DNM Group Office


Any questions?

Yes, DNM Heating & Cooling offers emergency HVAC services to ensure that you are never left without heating or cooling when you need it most. Our emergency service team is available 24/7 to address urgent HVAC issues in Sault Ste. Marie and the surrounding Algoma District. Whether it’s a malfunctioning furnace in the dead of winter or an air conditioner that stops working during a heatwave, our skilled technicians are ready to provide prompt, reliable repairs to restore your home’s comfort. For emergency assistance, please call us directly so we can prioritize your service request and resolve the issue as quickly as possible. If you need emergency service, call (705) 256-6163 now.

Yes, DNM Heating & Cooling can significantly help improve the energy efficiency of your home. We specialize in installing, maintaining, and upgrading HVAC systems to ensure they operate at peak efficiency. By assessing your current system and understanding your specific needs, we can recommend solutions such as high-efficiency models, programmable thermostats, or zoning systems that reduce energy consumption and lower utility bills. Additionally, we offer regular maintenance services that play a crucial role in keeping your HVAC system running efficiently. Routine checks help identify and fix minor issues before they lead to bigger problems, ensuring your system is not overworking, which can also reduce its energy use. By optimizing the performance of your HVAC equipment, we can enhance your home’s comfort while minimizing energy costs.

Regular HVAC maintenance offers several key benefits that enhance both the performance and lifespan of your heating and cooling system:

  1. Increased Efficiency: Regular maintenance ensures that your HVAC system operates at peak efficiency. This includes cleaning or replacing air filters, checking and cleaning coils, and ensuring that all components are functioning properly. An efficient system uses less energy to heat or cool your home, which can lead to lower utility bills.

  2. Extended Equipment Lifespan: HVAC systems are significant investments, and regular maintenance helps extend their operational life. By addressing small issues before they develop into major problems, maintenance helps avoid premature breakdowns and costly replacements.

  3. Improved Air Quality: During maintenance checks, cleaning of the air filters, ducts, and coils reduces the accumulation of dust, pollen, and other airborne contaminants. This is crucial for maintaining good indoor air quality, which is essential for the health and comfort of your home’s occupants.

  4. Enhanced Comfort: Regular maintenance helps ensure consistent airflow and temperature control throughout your home. This consistency helps avoid hot or cold spots and maintains your home’s comfort levels year-round.

  5. Prevention of Major Repairs: Many HVAC issues can be detected during routine maintenance before they turn into major problems. Early detection and repair can save homeowners significant repair costs and prevent the inconvenience of system failures.

  6. Safety: Regular maintenance checks also serve as safety inspections, especially for heating systems. Technicians check for leaks, corrosion, and proper functioning of the HVAC system, which can prevent dangerous situations like carbon monoxide leaks from a faulty furnace.

Overall, regular HVAC maintenance is a proactive strategy that keeps your system running smoothly, enhances comfort, improves air quality, and saves money by reducing energy costs and avoiding expensive repairs.

Your HVAC system should typically be serviced at least once a year to ensure it operates efficiently and reliably. Here’s a breakdown of the general recommendations:

  1. Heating System: It’s best to have your heating system serviced once a year, ideally in the fall before the heating season begins. This service includes checking the furnace or boiler for operational issues, cleaning essential components, and ensuring the system is ready to heat your home efficiently throughout the colder months.

  2. Cooling System: Similarly, your air conditioning system should be serviced annually, preferably in the spring before the warm weather sets in. This check-up will involve cleaning the coils, checking the refrigerant levels, and ensuring all parts are in good working order to provide effective cooling.

For homes with heat pumps that function as both heating and cooling systems, servicing is recommended twice a year, in the spring and fall, due to their year-round operation.

Regular maintenance not only helps in extending the lifespan of your HVAC equipment but also in maintaining its efficiency and safety. It also helps in identifying potential problems that could lead to costly repairs if left unattended. Scheduling these service check-ups regularly with a professional like DNM Heating & Cooling ensures that your system remains in optimal condition, providing comfort and saving you money in the long run.

There are several key signs that your HVAC system may need repairs. Here are some common indicators to watch out for:

  1. Unusual Noises: If your HVAC system starts making strange noises such as grinding, banging, or squealing, it could indicate a mechanical problem, such as issues with belts, bearings, or motor components.

  2. Weak Airflow: Poor airflow through your vents can suggest problems with the blower or ducts. It might also indicate a clogged air filter that needs replacing.

  3. Inconsistent Temperatures: If some rooms are too hot while others are too cold, your system might be failing to distribute air evenly. This could be due to duct problems, inadequate insulation, or issues with the HVAC unit itself.

  4. High Energy Bills: An unexpected increase in your energy bills can be a sign of inefficiency in your HVAC system. This inefficiency can often be attributed to an underlying maintenance issue that needs addressing.

  5. Frequent Cycling: If your HVAC system is turning on and off more frequently than usual, it could be due to an incorrect thermostat setting, a malfunction in the thermostat, or a problem with the HVAC system itself.

  6. Bad Odors: Unpleasant smells coming from your HVAC system can indicate mold or mildew presence, which can have serious health implications, or a problem with the system burning off dust.

  7. Age: If your system is over 10 years old and starting to have frequent breakdowns, it might be more cost-effective to consider a replacement rather than continuing to pay for frequent repairs.

  8. Humidity Problems: During the cooling season, your air conditioner should moderate humidity levels automatically. If you notice your indoor air seems overly humid, it might indicate that your HVAC system is not functioning properly.

If you notice any of these signs, it’s advisable to call a professional HVAC technician to inspect your system. Catching problems early can prevent more significant issues down the road and save you money on repairs and energy costs.

At DNM Heating & Cooling, we stand behind the quality of our work with comprehensive warranties and guarantees, ensuring that you receive the highest level of service and peace of mind. We offer an extensive 10-year Extended Labour Warranty on new furnaces, air conditioners, and boilers. This warranty covers diagnostic calls and labor charges on warranty parts within the cabinet of the unit. Additionally, after-hours services are covered for no-heat calls, ensuring you have support when you most need it.

Please note, the Extended Labour Warranty requires that annual maintenance, costing $139.99 plus tax, be completed yearly. This regular maintenance is crucial as it ensures your unit operates efficiently and the warranty remains valid. It is important to understand that this warranty is limited to the contents of the cabinet only; other components outside the cabinet are not covered and will incur a service charge. Also, certain exclusions apply, such as the replacement of heat exchangers or quality pledge furnaces.

To keep your Labour Warranty active, it’s your responsibility to schedule and complete this annual maintenance. Failure to comply with this requirement will result in the warranty becoming void. We encourage you to discuss these warranty options and conditions with our team during your service consultation to fully understand the benefits and requirements, ensuring you enjoy uninterrupted comfort and service from your HVAC system.

The installation time for a new HVAC system can vary based on several factors including the type of system, the complexity of your installation, and whether any additional modifications like ductwork adjustments are needed. Typically, a straightforward replacement of an existing system can be completed in one day. However, if new ductwork or other significant modifications are required, the installation could extend to two or three days.

For completely new installations in buildings that have never had an HVAC system, or for extensive renovations that involve multiple units or complex configurations, the process could take a week or more. During your initial consultation and assessment, our team at DNM Heating & Cooling will provide a detailed timeline based on your specific circumstances and requirements to ensure you know what to expect.

Yes, upgrading your HVAC system can often qualify for various government rebates and incentives which can significantly reduce your installation costs. At DNM Heating & Cooling, we stay updated on the latest rebates and incentives available to ensure you get the best possible savings. We encourage you to visit our rebate page for detailed information on current offers that can help you save on your HVAC installation. This way, you can make an informed decision and maximize your investment in your home’s comfort and energy efficiency.

An HVAC system inspection is a thorough assessment of your heating, ventilation, and air conditioning system to ensure it is operating efficiently and safely. Here’s what is typically involved in an HVAC system inspection conducted by professionals like DNM Heating & Cooling:

  1. Visual Inspection: This includes checking the overall condition of the HVAC units, examining external and internal components to identify any visible signs of wear or damage.

  2. Cleaning Components: Key parts such as the condenser and evaporator coils, blower motor, and filters are cleaned to remove dust, debris, and other obstructions that could impair the system’s efficiency.

  3. Checking Refrigerant Levels: For air conditioning units, it’s crucial to check refrigerant levels to ensure they are within the optimal range. Too much or too little refrigerant can cause your system to run inefficiently and increase energy costs.

  4. Inspecting Electrical Connections: Technicians check all electrical components and connections for signs of wear, fraying, or corrosion. They also ensure that the system is running with the correct voltage and current.

  5. Testing Thermostat Calibration: The inspection includes checking the thermostat to ensure it is properly calibrated and accurately controlling the temperatures in your home.

  6. Inspecting the Ductwork: The ducts are checked for any leaks, blockages, or damage that could restrict airflow and reduce system efficiency.

  7. Safety Checks: For heating systems, particularly those that burn fuel, it’s important to check for carbon monoxide leaks and ensure that all safety protocols are functioning properly.

  8. Assessing System Performance: The overall performance of the HVAC system is assessed to ensure it is heating and cooling effectively and efficiently. This includes checking the start cycle and shut-off sequence to ensure the system operates as it should.

  9. Providing Recommendations: Based on the inspection, the technician will provide recommendations for any needed repairs or adjustments and may suggest upgrades to improve system efficiency or longevity.

These inspections are vital for prolonging the life of your HVAC system, ensuring safety, and maintaining efficiency. Regular inspections can help detect issues before they become major problems, saving you time, money, and inconvenience.

Preparing your HVAC system for seasonal changes is crucial to maintaining its efficiency and extending its lifespan. Here are some steps you can take to ensure your system is ready for a change in weather:

  1. Change or Clean Filters: This is one of the simplest and most effective ways to maintain your HVAC system. Replace or clean air filters every 1-3 months, depending on usage and the type of filter you have.

  2. Check Thermostat Settings: Adjust your thermostat for the coming season. Consider installing a programmable thermostat if you don’t already have one, as it can help save energy by adjusting the temperature automatically during different times of the day.

  3. Inspect and Clean Air Ducts: Check your air ducts for dust accumulation and any potential leaks. Clean ducts improve air quality and efficiency. Sealing leaks can significantly reduce energy loss.

  4. Schedule Professional Maintenance: Have a professional technician from DNM Heating & Cooling perform a thorough inspection and maintenance service. This typically includes checking the system’s components such as the condenser, evaporator coils, and all electrical parts, ensuring they are in good working order.

  5. Clear the Area Around Outdoor Units: Remove any debris such as leaves, twigs, and dirt from around the outdoor air conditioning or heat pump units. Make sure there’s at least two feet of clearance around the unit to ensure proper airflow.

  6. Test the System: Before the peak of the new season, turn on your system to check if it is working correctly. Listen for unusual noises and check for unusual smells. If something doesn’t seem right, contact a professional.

  7. Check Insulation and Seals: Ensure that windows and doors are properly sealed to prevent air leaks. Check the insulation in your attic and other areas to ensure it’s adequate. Proper insulation reduces the workload on your HVAC system.

  8. Prepare for Winter: If transitioning into winter, make sure to check the heating system more thoroughly. Inspect the furnace flame for a clean, blue color and ensure all gas connections are secure.

  9. Prepare for Summer: If preparing for summer, clean your air conditioner’s condensate drain to prevent clog-related issues and check the coolant levels to ensure efficient cooling.

By following these steps, you can help your HVAC system operate more efficiently, prevent unexpected breakdowns, and keep your home comfortable throughout the year.

Part of the Family

Being a member of DNM Group means you can be assured of our dedication to maintaining the highest level of customer service and craftsmanship that stands out from the competition. We call this commitment to excellence ‘The DNM Difference,’ setting new standards in quality and reliability across all our operations.

The DNM Guarantee

Your Satisfaction
is Our Success

As the top provider of residential HVAC services in Sault Ste. Marie, we go above and beyond to meet your needs with professionalism, expertise, integrity, and transparency. We offer expert installations, repairs, and maintenance tailored to all your heating and cooling requirements.

Our commitment to quality workmanship and customer satisfaction explains why more residents are choosing DNM Heating & Cooling every day.

Find out why we are the preferred choice for enhancing home comfort and efficiency in Sault Ste. Marie.

Contact Us

Book your appointment