Commercial
Commercial HVAC Services
London Ontario
Hawana HVAC Solutions provides commercial HVAC services across London Ontario and Southwestern Ontario — rooftop unit installation, repair, and maintenance for retail, restaurant, office, and light industrial buildings; commercial gas furnace and AC systems; restaurant kitchen ventilation and makeup air; and commercial gas line services. 24 hours a day, 7 days a week, at zero after-hours surcharge, because a restaurant losing Saturday dinner service, a retail store during a heat wave, or an office building before Monday morning cannot wait for business hours. TSSA certified. BBB A+. 138 five-star Google reviews. Custom commercial quotes — no published commercial pricing, because every commercial HVAC project is different. Call (647) 550-4220 for a free commercial assessment.
Commercial HVAC Services — London Ontario & Southwestern Ontario
Complete commercial heating, cooling, and ventilation services for businesses of all sizes. Custom quotes on every project. No standard commercial pricing — every commercial building is different.
Rooftop Unit (RTU) Services
The most common commercial HVAC equipment in Southwestern Ontario. Hawana installs, repairs, and maintains all major commercial RTU brands across London Ontario and surrounding areas.
- RTU installation and replacement (all capacities)
- Emergency RTU repair — 24/7 zero surcharge
- RTU preventive maintenance programs
- Economizer inspection and calibration
- Refrigerant leak detection and repair
- Compressor replacement and assessment
Commercial Furnace & Heating
Commercial gas furnace installation, repair, and maintenance for office, retail, warehouse, and light industrial buildings. Including unit heaters, rooftop gas heating sections, and makeup air heaters.
- Commercial gas furnace installation
- Unit heater installation and repair
- Rooftop unit heating section repair
- Makeup air unit (MAU) gas heating
- Heat exchanger inspection and replacement
- Commercial gas line services
Commercial AC & Cooling
Commercial air conditioning installation, repair, and maintenance. Central commercial AC, ductless VRF systems for zoned commercial buildings, and commercial heat pump systems.
- Commercial central AC installation
- VRF/VRV ductless systems for multi-zone buildings
- Commercial heat pump systems
- Commercial AC emergency repair
- Refrigerant management and recharge
- Commercial AC coil cleaning
Restaurant & Kitchen Ventilation
Restaurant HVAC requires specific expertise: kitchen exhaust, makeup air, and dining area comfort are separate but interdependent systems. An imbalanced ventilation system causes odour transfer, negative pressure, and uncomfortable dining conditions.
- Kitchen exhaust system maintenance
- Makeup air unit (MAU) installation and service
- Dining area RTU and split system service
- Grease-fouled condenser coil cleaning
- Quarterly maintenance for food service
- Ventilation balancing
Commercial Maintenance Programs
Preventive commercial HVAC maintenance reduces emergency repair costs, maintains equipment efficiency, and extends system life. Maintenance frequency is customized by equipment type and usage — quarterly for restaurants and high-use applications, bi-annual for offices and retail.
- Custom maintenance schedules by equipment type
- Rooftop unit seasonal inspections
- Filter, belt, and coil service
- Economizer inspection and calibration
- Priority emergency scheduling for maintenance clients
- Custom commercial quote — call for details
Commercial Gas Line Services
Gas line installation, modification, and testing for commercial buildings. Restaurant gas connections to fryers, grills, and ovens. Commercial furnace and unit heater gas line sizing and installation. TSSA licensed for commercial gas work.
- Commercial gas line installation
- Restaurant appliance gas connections
- Commercial gas pressure testing
- TSSA certified — all commercial gas work
- Gas leak detection and repair
- Meter set and utility coordination
Commercial HVAC for Every Business Type in Southwestern Ontario
Different industries have different HVAC demands. Hawana serves all of these business types across London Ontario and Southwestern Ontario — with maintenance frequency and service requirements matched to each industry's specific needs.
Restaurants & Food Service
Kitchen exhaust, makeup air, dining HVAC. Quarterly maintenance due to grease contamination. Condenser coil cleaning critical.
Retail Stores
Customer comfort and energy efficiency. Single or multi-zone rooftop units. High occupancy loads affect cooling demand significantly.
Office Buildings
Multi-zone climate control. Rooftop units with economizers. Variable occupancy patterns. Quarterly or bi-annual maintenance.
Warehouses & Industrial
Unit heaters for spot heating. Large-capacity ventilation. High ceilings change heating dynamics. Destratification fan integration.
Schools & Institutions
Indoor air quality critical. ASHRAE 62.1 ventilation compliance. Rooftop units with high fresh air fractions. Seasonal scheduling.
Healthcare & Medical
Strict temperature and humidity control. Air filtration and pressurization requirements. Redundant system needs. Priority emergency response.
Multi-Residential
Individual suite systems or shared corridor systems. Corridor heating and cooling. Parkade ventilation. Common area climate control.
Light Manufacturing
Process cooling and worker comfort. Fume and dust extraction. Make-up air for negative pressure control. Custom load calculations.
What Is a Rooftop Unit and Why Do Commercial Buildings Use Them?
Rooftop units are the dominant commercial HVAC equipment in Southwestern Ontario. Understanding how they work — and what most commonly fails — is the foundation of effective commercial HVAC management.
Why Commercial Buildings Use RTUs Instead of Split Systems
A rooftop unit (RTU) places all HVAC components — compressor, condenser, evaporator, gas heating section, blower, and controls — in a single self-contained cabinet on the roof. Unlike residential split systems with indoor and outdoor components, an RTU has no indoor mechanical equipment. This frees up valuable interior space, simplifies maintenance access (all service points on the roof), and allows multiple zones to be served by separate RTUs without any mechanical equipment inside the building.
How an RTU Works
In cooling mode: return air from the building enters the RTU through the return air duct. The blower draws this air across the evaporator coil, where refrigerant absorbs heat. The cooled air is then distributed through supply ducts back into the building. The refrigerant carries the absorbed heat to the condenser section, where the condenser fan discharges it to the outdoor air. In heating mode: the gas burner section heats the supply air directly before it enters the distribution ductwork.
The Economizer — RTU's Free Cooling Mode
Most commercial RTUs in Ontario include an economizer — a damper and control system that opens to draw in outdoor air when outdoor conditions are suitable for cooling without running the compressor. In Southwestern Ontario's climate, economizers can provide free cooling for significant portions of spring and fall, reducing compressor run time and electricity costs substantially. A malfunctioning economizer — either stuck closed or stuck open — is a significant energy waste problem. Economizer inspection is part of every Hawana commercial RTU maintenance visit.
RTU Sizing — Different from Residential
Commercial RTU sizing must account for occupancy density, lighting heat gains, equipment heat gains, and ASHRAE 62.1 ventilation requirements — all significantly different from residential loads. A 4,000 square foot retail store with high occupancy, extensive lighting, and required fresh air ventilation has a very different cooling load than a 4,000 square foot residence. Commercial RTU sizing always requires a full ACCA Manual N (the commercial equivalent of Manual J) load calculation.
🏠 RTU Components — What's Inside
❄ Compressor
Pumps refrigerant through the system. Most expensive component. Failure usually triggers RTU replacement vs repair decision.
🌊 Condenser Coil & Fan
Releases absorbed heat to outdoor air. Restaurant grease fouls condenser coils rapidly — quarterly cleaning critical.
❄️ Evaporator Coil
Absorbs heat from return air. Must be kept clean for efficiency. Indoor coil — fouling less common than condenser.
🔥 Gas Heating Section
Burner and heat exchanger for heating mode. Heat exchanger cracks are a safety issue — carbon monoxide risk.
🌿 Economizer
Damper system for free cooling when outdoor conditions allow. Stuck open or closed wastes significant energy.
🔌 Controls
Thermostat, DDC controls, or BMS integration. Economizer controller calibration is frequently the root cause of energy waste.
Common RTU Failures & Typical Costs
Compressor
Most expensive RTU component. Replacement cost frequently exceeds 50% of new unit cost, triggering the replacement vs repair decision.
Economizer Actuator
Stuck open or closed. Major source of energy waste. Often missed without regular maintenance inspection.
Refrigerant Leak
Rooftop vibration stresses line connections. Recharge without fixing the leak is temporary. Leak detection and repair required.
Heat Exchanger Crack
Carbon monoxide risk. Any cracked heat exchanger in a commercial RTU must be shut down immediately and assessed for replacement.
How Commercial HVAC Differs from Residential
Commercial HVAC involves different equipment, different sizing methods, different regulations, and different maintenance schedules than residential. Understanding the differences helps commercial property owners make better-informed decisions.
Residential HVAC
- Split system: outdoor condenser + indoor air handler
- Sized with ACCA Manual J (residential load calculation)
- Governed by Ontario Building Code residential section
- Typical size: 1.5 to 5 tons
- Annual maintenance typical
- Published pricing (Hawana: from $3,500)
- Single zone or simple 2-zone systems
- ESA permit for electrical work
- Refrigerant handled by TSSA certified technician
Commercial HVAC
- Rooftop units (RTU), VRF systems, or commercial split systems
- Sized with ACCA Manual N (commercial load calculation)
- Governed by Ontario Building Code Part 3 (large buildings)
- Typical size: 2 tons (storefront) to 50+ tons (large retail/office)
- Quarterly or bi-annual maintenance typical
- Custom quote — every project is different
- Multi-zone with independent thermostats
- ESA permit + potential Building Permit depending on scope
- ASHRAE 62.1 ventilation compliance required
ASHRAE 62.1 note: Commercial buildings in Ontario must provide minimum fresh air ventilation rates specified by ASHRAE Standard 62.1 — Ventilation for Acceptable Indoor Air Quality. These rates depend on occupancy density and space type: offices require approximately 8.5 L/s per person plus 0.3 L/s per square metre of floor area; restaurants require more due to higher occupancy and cooking odour loads. An RTU economizer set to provide the minimum required outdoor air at all times is part of ASHRAE compliance. Hawana's commercial service includes economizer calibration to maintain code-required ventilation rates.
Your London Ontario Commercial HVAC Expert
Abdullah Ghzail — Lead HVAC Technician & Founder
Abdullah provides commercial HVAC services across London Ontario and Southwestern Ontario — rooftop unit repair and maintenance for retail, restaurant, office, and light industrial buildings where a failed RTU at 2am on a Friday means lost revenue and immediate action is required at zero after-hours surcharge; quarterly restaurant RTU maintenance that catches grease-fouled condenser coils and failed economizers before they cause compressor failures; and honest commercial assessments that provide both a repair quote and a replacement quote when the compressor cost triggers the commercial replacement-vs-repair decision. TSSA certified. BBB A+. 138 five-star reviews. Custom commercial quotes on every project. Call (647) 550-4220 for a free commercial assessment.
Commercial HVAC Reviews — London Ontario
138 five-star Google reviews — restaurant Friday evening emergency zero surcharge, office RTU economizer energy waste fixed, retail RTU compressor honest replacement advice. Read all ↗
"Restaurant in London — RTU failed on a Friday evening in August. Dining area above 30 degrees. Called three HVAC companies. Two said Monday. One quoted a surcharge before asking about the problem. Hawana: no surcharge, technician within two hours. Contactor failed, condenser coils heavily fouled with grease — a maintenance problem we should have caught. Fixed at the same visit. Dining area back at 22 degrees before kitchen closed. Zero surcharge Friday evening, honest maintenance advice, now on a quarterly commercial maintenance agreement."
"Office building in London — three rooftop units. One RTU running continuously without maintaining set temperature in the second floor offices. Technician identified the economizer damper stuck open — warm outdoor air continuously mixing into the supply in June. Actuator replaced, economizer recalibrated. Second floor now maintaining temperature and the electricity bill for that zone has dropped noticeably. The economizer issue was something I had no awareness of — the technician explained it clearly and it was an obvious fix once diagnosed."
"Retail store in White Oaks — 4,500 square feet, single RTU from 2009. Energy bills climbing year over year. Hawana found a cracked heat exchanger (safety issue — shut down immediately), non-functional economizer, and low refrigerant from a slow leak. They quoted both the repair cost and a replacement Carrier RTU side by side — honestly, without pushing either direction. Replacement made more financial sense given the age. New 5-ton Carrier installed, crane rental included in the quote with no surprise fee, ESA permit pulled. The honest side-by-side comparison and no hidden fees was exactly what you want in a commercial contractor."
Commercial HVAC London Ontario — FAQ 2026
Every question London Ontario business owners and property managers ask about commercial HVAC — RTU services, maintenance frequency, economizers, commercial vs residential, emergency service, and repair vs replace.
Ready for Commercial HVAC Service in London Ontario?
Rooftop unit repair, installation, and maintenance. Commercial furnace and AC. Restaurant ventilation. 24/7 zero after-hours surcharge. Custom commercial quotes — free on-site assessment for London Ontario and Southwestern Ontario commercial clients. TSSA certified. BBB A+. 138 five-star reviews.
Commercial & Residential HVAC Services
Choose Hawana Hvac Solutions
TIME
We know that your time is precious, whether it's renting a property, your own property or your company, we will be there immediately, so you can resume your daily activities with as little disruption as possible.
QUALITY
Our technicians are experienced and use new, original, and high-quality parts to complete your equipment repairs.
PRICE
Other companies will give you the invoice to the unknown amount when repairing. Along with us, it will always take some effort before the work done before work is done.
