Commercial HVAC Solutions & Specialized Service
At Therwood, we know your facility’s comfort drives customer satisfaction and employee productivity. From new builds and complex renovations to 24/7 emergency heating service, our team provides the specialized expertise heavy-duty systems require. For over 30 years, we’ve kept Durham and York Regions running at the perfect temperature - we’re the partners your business deserves.
Need a personalized quote for your commercial project?
Get a Commercial QuoteSystem Design & Installation
Engineering Efficiency from the Ground Up
We provide sales and installation, allowing us to source the perfect equipment for your specific application. Our team manages the entire process, including complete mechanical design. This covers heat loss calculations and ventilation planning - ensuring your project is compliant and efficient from day one.
From rooftop units (RTUs) to specialized boiler systems for large-scale buildings, we offer full-service design-build solutions for new projects and extensive renovations.
24/7 Emergency Heating Service
A mechanical failure can bring your operations to a stop, so our focus is keeping downtime to a minimum. We provide 24/7 emergency heating service for commercial boilers and furnaces to keep your facility running. We service all major brands and honour manufacturer warranties, helping get your business back up and running as quickly as possible.
Commercial Maintenance Plans
Proactive Protection for Your Facility
Regular maintenance is the best way to avoid unexpected shutdowns and extend the life of your mechanical investment. Therwood offers tailored maintenance contracts featuring quarterly, semi-annual, or annual visits depending on your facility's needs. We work with you to design a schedule that suits your type of business and ensures your systems operate at peak efficiency year-round.
Frequently Asked Questions
How often does commercial HVAC equipment require maintenance?
Unlike residential systems, commercial rooftop units (RTUs) typically require quarterly or bi-annual service. High-demand environments—like retail, restaurants, or industrial spaces—need frequent filter changes and belt inspections to prevent unexpected downtime and ensure air quality for staff and customers.
Do you provide service for multiple properties or units?
Yes. We specialize in comprehensive maintenance contracts for property managers and business owners with multiple units. We track the service history and health of every unit in your portfolio, allowing you to budget for future repairs rather than dealing with emergency surprises.
Can you help with engineered drawings or permits for new installations?
Absolutely. For large-scale replacements or new commercial builds, we coordinate with the necessary engineers and local municipalities to ensure all equipment is sized correctly, meets Ontario Building Code requirements, and is properly permitted.
Do you service specialized commercial equipment?
Yes. Our licensed technicians are trained to service a wide range of commercial mechanical systems, including Rooftop Units (RTUs).
Can a maintenance plan help lower my building's operating costs?
Definitely. A neglected RTU can draw significantly more power and wear out components prematurely. By keeping coils clean and motors lubricated, we lower your monthly hydro and gas consumption while extending the overall lifespan of your expensive mechanical assets.
Looking for a quote tailored to your commercial HVAC needs?
Reach out today! We’ll keep your systems running so you can focus on your business.