Repairing Services
Carlton 5 Mechanical Services
Servicing Niagara Region and surrounding areas including St.Catharines, Welland, Fort Erie, Hamilton, Burlington, Oakville, Waterdown, Stoney Creek, Dundas, Grimsby.
Heating Cooling Metal Fuels Sensors
Plumbing Heating Building Automation Net Zero Incentives

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our servicses
Tailored Solutions to
Fit Your Needs
01
Heating
Sales, Service & Installation of Commercial HVAC Systems, Controls & Equipment.
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Cooling
Sales, Service & Installations for Commercial/Industrial AC, RTUs, Chillers & Splits.
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Metal
Complete Design & Build of Commercial/Industrial Ductwork Systems, Installs & Repairs.
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Fuels/ Sensors
Complete Commercial/Industrial Natural Gas Services, Hookups, Lines & Monitoring.
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Plumbing & Heating
Experience peace of mind with our Plumbing & Heating services for home warmth & comfort.
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About us
Carlton 5 Offers Heating & Air Conditioning Services to the Niagara Region
Offering combined experience of more than 70+ years, Carlton 5 proudly serves St. Catharines and the Niagara Region with professional heating, air conditioning and refrigeration sales and service.
Call us to ensure your home, commercial or industrial facility HVAC system is working properly and efficiently for all seasons of the year. Your HVAC system does require maintenance to reduce service calls and interruptions.
Carlton 5 mechanical prides itself on over 70 years of experience and technical abilities serving the Niagara Region and throughout southern Ontario. Let Carlton 5 Mechanical be your 1 call for all your HVAC needs and emergencies.
Some of the following situations we can assist our clients base, no heat, no cooling, boiler not working, water leaks from hvac, thermostat not working, chiller not working, high energy/utility costs.
- Total Comfort Installation
- RapidRepair Services
- PureAir Quality Testing
- CoolBreeze Cleaning
- FrostGuard Inspection
- EcoCool Upgrades
Prompt diagnosis and repair of any issues with your air conditioning unit your ensure optimal performance Inspection of ductwork for leaks.
Call any time for Freseir services
905-682-4827
Furnace & Air Conditioning Experts with Over 70+ Years Experience
Our focus is on your comfort, but we also have an eye towards the future. We promote environmental, green technology systems and can advise you on the best furnace and air conditioning systems for both residential and businesses throughout Niagara.
For the following HVAC sytems
Furnaces, boilers, domestic hot water, Tube Infa Radiant systems, heat pumps, geo thermal systems, chillers, cooling towers, Make Up Air systems, Exhaust fans, ductless splits, indoor air quality, building automation.
Our HVAC skilled and licensed team of technicians are on call 24/7 365 days a year to look after all your emergencies to get you back on track, whether its your home office or industrial facility.

Our Achievements
Milestone
Success
Established in 2011
Servicing Niagara, St.Catharines, Hamilton and surrounding areas including Burlington, Oakville, Waterdown, Stoney Creek, Dundas, Grimsby.
500 + Jobs
Over 500 Projects Successfully Completed with Quality, Reliability, and Expertise
$150
Monthly
Basic Plan
Refrigerant leak detection & repair
Thermostat replacement
Clean condenser coil
Air filter replacement
Clean condenser coil
AC fan replacement
$200
Monthly
Standard Plan
Refrigerant leak detection & repair
Thermostat replacement
Clean condenser coil
Air filter replacement
Clean condenser coil
AC fan replacement
$250
Monthly
Premium Plan
Refrigerant leak detection & repair
Thermostat replacement
Clean condenser coil
Air filter replacement
Clean condenser coil
AC fan replacement
$350
Monthly
Basic Plan
Refrigerant leak detection & repair
Thermostat replacement
Clean condenser coil
Air filter replacement
Clean condenser coil
AC fan replacement
$500
Monthly
Standard Plan
Refrigerant leak detection & repair
Thermostat replacement
Clean condenser coil
Air filter replacement
Clean condenser coil
AC fan replacement
$600
Monthly
Premium Plan
Refrigerant leak detection & repair
Thermostat replacement
Clean condenser coil
Air filter replacement
Clean condenser coil
AC fan replacement
Testimonials
Our Clients Feedback

John Pattihis
Safari Flower Company

Mike C

Mary Murrphy

70+
Years
Experience

Faq
Frequently Asked Questions
Who is Carlton 5 Mechanical Services?
Carlton 5 Mechanical Services is a full-service HVAC company with over 70 years of combined experience, specializing in installation, repair, and maintenance for both residential and commercial clients. We serve the Niagara Region and surrounding areas, offering expertise in heating, cooling, refrigeration, and indoor air quality solutions.
What sets Carlton 5 Mechanical Services apart from other HVAC companies?
Our company stands out due to our commitment to customer satisfaction, highly trained and certified technicians, transparent pricing, and prompt emergency service. We focus on building long-term relationships with our clients by providing reliable, high-quality work and comprehensive maintenance plans. Our team is dedicated to clear communication, fair pricing, and offering the latest in energy-efficient technology.
Are your technicians licensed and certified?
Yes, all our technicians are fully licensed, insured, and certified. We ensure our staff receives ongoing training to stay current with industry standards and new HVAC technologies, so you can trust that your system is in expert hands.
What areas do you serve?
We proudly serve the Niagara Region and surrounding communities, including St. Catharines, Welland, Fort Erie, Hamilton, Burlington, Oakville, Waterdown, Stoney Creek, Dundas, Grimsby, and Winona.
Do you provide emergency HVAC services?
Absolutely. We offer 24/7 emergency repair services, so you can count on us to respond quickly and professionally whenever you need urgent assistance with your heating, cooling, or refrigeration systems.
How do you ensure customer satisfaction?
We prioritize excellent customer service by responding promptly to inquiries, providing detailed and honest estimates, and following up after every job. Our reputation is built on positive client feedback, a clean track record, and a commitment to resolving any concerns quickly and thoroughly.
What types of systems and services do you offer?
We handle a wide range of HVAC equipment, including furnaces, boilers, air conditioners, heat pumps, chillers, refrigeration units, water heaters, and custom ductwork. Our services cover installation, repair, maintenance, and upgrades for both residential and commercial properties.
How can I request a quote or schedule service?
You can contact us by phone, email, or through our website’s contact form. We offer free quotes and consultations for all projects, and our team is always ready to answer your questions or schedule a service visit.
Why should I choose Carlton 5 Mechanical Services for my HVAC needs?
Choosing us means you’re working with an established, reputable company that values safety, quality, and long-term client relationships. We are fully licensed and insured, have a proven track record, and always put your comfort and satisfaction first.
What are the pros and cons of tankless water heaters?
Tankless water heaters provide hot water on demand and are more energy-efficient than traditional tank models, which can help lower your utility bills. They also save space with their compact, wall-mounted design and often have a longer lifespan. However, they come with a higher upfront cost for purchase and installation, may require upgrades to your home’s gas or electrical lines, and can struggle to supply enough hot water for multiple uses at once. For large families or businesses with high simultaneous demand, a tankless system may not always keep up.
Why is there no heat from my HVAC system?
If you’re not getting heat, common causes include clogged air filters, thermostat problems, tripped breakers, ignition or pilot light failures, ductwork leaks, or issues with your boiler or heat pump. Start by checking your thermostat settings, replacing the air filter, and making sure your breakers haven’t tripped. If these don’t solve the problem, it’s best to call a licensed HVAC technician for a thorough inspection.
Why is there no cooling from my HVAC system?
No cooling can be caused by dirty filters, incorrect thermostat settings, low refrigerant, frozen coils, blocked vents, or electrical issues. First, check your thermostat and make sure your air filter is clean. If the system still doesn’t cool, professional service is recommended to diagnose and fix the problem.
Why is my boiler not working?
Boiler issues can result from blocked burners, faulty fans or gas valves, low pressure, frozen or blocked condensate pipes, electrical faults, or a malfunctioning thermostat. If your boiler isn’t working, don’t try to repair it yourself. Always contact a certified technician for safe and effective repairs.
Why is my HVAC system leaking water?
Water leaks from HVAC systems are often due to a clogged condensate drain line, a dirty air filter causing the coil to freeze and thaw, a cracked drain pan, low refrigerant, or improper installation. If you notice water pooling around your unit, turn off the system and call a professional to prevent water damage and further complications.
What should I do if my thermostat is not working?
If your thermostat isn’t working, check that it’s set to the correct mode, replace the batteries if needed, and make sure it’s powered on. If the display is blank or the settings are unresponsive, the thermostat may need to be replaced. If basic troubleshooting doesn’t help, contact a technician for assistance.
Why is my chiller not working?
A non-working chiller can be caused by low refrigerant, electrical faults, a faulty compressor or pump, sensor issues, or poor maintenance. Chiller problems in commercial settings can lead to downtime and product loss, so it’s important to have a professional technician inspect and repair the system as soon as possible.
Why are my energy or utility costs so high?
High energy bills are often the result of dirty filters or coils, leaking ductwork, outdated or improperly sized equipment, incorrect thermostat settings, or lack of regular maintenance. To reduce your costs, make sure to change filters regularly, seal ducts, schedule routine maintenance, and consider upgrading to more energy-efficient equipment.
How do I know which water heater is best for my needs?
The best water heater for you depends on your fuel source (gas, electric, or propane), the amount of hot water you need, the type of heater (tank or tankless), energy efficiency ratings, and available space. For personalized recommendations, consult an HVAC professional who can assess your specific requirements and suggest the most suitable option.
If you have more questions or need immediate assistance, please contact our team. We’re here to help with all your HVAC and water heating needs!
Who To Work
Simple Working Process
Keeping the outdoor unit clean, and sealing any you leaks in your home can improve efficiency
Cool Wave System
Upgrade to the latest energy and efficient air conditioning Frost technology with Eco Cool
READ MOREArctic Installations
The Arctic Blast Repair service addresses all your air Eco Cool conditioning repair needs
READ MOREAir Flow Solutions
Our Quick Cool Installation and service provides fast and cooling efficient installation
READ MOREEmergency Service
We handle everything from and assessing your cooling needs to positioning Arctic Blast
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