How fast can you respond to a commercial HVAC emergency in Calgary?

Next Air responds to commercial HVAC emergencies in Calgary within 1–2 hours. Our service trucks are stocked with the most common parts so most problems are fixed on the first visit, minimizing costly downtime for your business. We offer 24/7 emergency service — call (587) 329-8603 any time.

What does commercial HVAC maintenance include?

Our commercial HVAC maintenance service includes a full inspection and cleaning of all system components: refrigerant level checks, coil cleaning, filter replacement, electrical component testing, lubrication of moving parts, thermostat calibration, gas burner inspection, and safety testing. Regular maintenance prevents expensive breakdowns, improves energy efficiency, and extends the life of your equipment.

How much does commercial HVAC maintenance cost in Calgary?

Commercial HVAC maintenance costs in Calgary vary based on the number and type of units, building size, and service frequency. Per-visit costs typically range from $200–$500, while annual maintenance contracts for commercial properties generally range from $1,000 to $10,000+ per year depending on system complexity. Next Air offers customized maintenance plans — contact us for a free quote.

How often should commercial HVAC systems be serviced in Calgary?

Most commercial HVAC systems in Calgary should be serviced at least twice a year — ideally in spring and fall before peak seasons. Systems with air filters (such as rooftop units and make-up air units) should receive a minimum of 3–4 service visits per year. Given Calgary's extreme winters and temperature swings, more frequent maintenance helps prevent costly cold-weather breakdowns.

How long does a commercial rooftop HVAC unit (RTU) last?

With proper maintenance, a commercial rooftop unit (RTU) typically lasts 15–20 years. In Calgary's harsh climate — including severe winters and Chinook temperature swings — units that are poorly maintained may fail sooner. Regular maintenance by certified technicians is the single biggest factor in extending RTU lifespan. If your unit is over 15 years old and experiencing frequent breakdowns or rising energy costs, it may be time to consider replacement.

How do I know if my commercial rooftop unit needs repair or replacement?

Signs that your commercial RTU may need repair or replacement include: frequent breakdowns, rising energy bills, inconsistent temperatures throughout your building, unusual noises or smells, and age over 15 years. A general rule: if repair costs exceed 30–40% of the cost of a new unit, replacement is usually the better investment. Next Air will inspect your system and give you an honest recommendation.

How much does it cost to install a commercial rooftop HVAC unit in Calgary?

Commercial rooftop unit (RTU) installation in Calgary typically costs between $8,000 and $25,000+ CAD per unit, depending on size (tonnage), system complexity, crane requirements, ductwork changes, and permit fees. City of Calgary mechanical and gas permits are required and are handled by our licensed technicians. Contact Next Air for a free site assessment and installation quote.

Do you service commercial refrigeration systems in Calgary?

Yes, Next Air services all types of commercial refrigeration equipment throughout Calgary. Our technicians are experienced with walk-in coolers and freezers, refrigerated display cases, ice machines, and industrial refrigeration systems. We serve restaurants, grocery stores, food service businesses, and more — keeping products safely refrigerated and your operations running.

What are the benefits of a commercial HVAC maintenance contract?

A commercial HVAC maintenance contract provides: priority emergency service, reduced risk of unexpected breakdowns, lower long-term repair costs, improved energy efficiency, extended equipment lifespan, and predictable budgeting. Businesses on maintenance contracts with Next Air also receive detailed service reports after every visit, making it easier to plan capital expenditures and track system health.

Why should I choose a commercial-only HVAC company instead of a residential contractor?

Commercial HVAC systems are significantly more complex than residential units — they handle larger loads, more complex ventilation requirements, and stricter building codes. Next Air focuses 100% on commercial and industrial HVAC, meaning our technicians are specifically trained on commercial equipment like rooftop units, make-up air systems, tube heaters, and commercial refrigeration. Residential HVAC companies often lack the expertise and equipment for commercial-scale systems.

How much can Calgary businesses save with energy-efficient commercial HVAC?

Most Calgary businesses save 15–30% on energy costs after upgrading to high-efficiency HVAC equipment or getting proper maintenance from Next Air. Calgary's long heating season and frequent temperature extremes make energy-efficient systems especially valuable here — they recover faster after Chinooks, maintain more consistent temperatures, and use significantly less energy during deep freezes. We provide a free energy assessment to show you the exact savings potential.

Do you offer 24/7 commercial HVAC emergency service in Calgary?

Yes. Next Air provides 24/7 emergency commercial HVAC service throughout Calgary and surrounding areas including Airdrie, Cochrane, Okotoks, and Chestermere. Call us any time at (587) 329-8603. Our response target for emergencies is 1–2 hours, and our trucks are stocked with common parts to resolve most issues on the first visit.

What commercial HVAC brands do you install and service?

Next Air installs and services all major commercial HVAC brands including Carrier, Lennox, Daikin, Mitsubishi, York, Bryant, Rheem, Reznor, Modine, Calcana, Schwank, Roberts Gordon, Keeprite, Heil, Coleman, Fujitsu, Allied, and Payne. Our technicians are trained across all brands and can perform warranty repairs on all major commercial equipment.

What commercial heating services does Next Air offer in Calgary?

Next Air offers a full range of commercial heating services in Calgary including: commercial furnace installation and repair, unit and tube heaters, commercial radiant heating, commercial heat pumps, exhaust fans, and make-up air units. We service all major brands and provide installation, repair, and preventative maintenance for all heating equipment types.

What areas near Calgary does Next Air serve?

Next Air provides commercial HVAC services throughout the Calgary area and surrounding communities, including Airdrie, Canmore, Okotoks, Cochrane, High River, Strathmore, Bragg Creek, Chestermere, Langdon, Didsbury, and De Winton. Call (587) 329-8603 to confirm service availability in your specific location.

What permits are required for commercial HVAC installation in Calgary?

The City of Calgary requires mechanical and gas permits for commercial HVAC installations, including rooftop unit replacements. Permit fees can range from $500 to $2,000+ depending on project scope. As a licensed commercial HVAC contractor, Next Air handles all permit applications and ensures every installation meets Calgary building codes and Alberta safety standards.

How long does a commercial HVAC installation take?

Most commercial HVAC installations in Calgary take anywhere from a few days to a couple of weeks depending on system size and complexity. A straightforward rooftop unit replacement can often be completed in 2–5 days, while larger projects involving new ductwork, crane lifts, or full system design may take longer. Next Air works around your schedule to minimize business disruption and provides a clear timeline after a site visit.

Is it worth upgrading an older commercial HVAC system in Calgary?

In most cases, yes. Older commercial HVAC systems — especially those 15+ years old — are significantly less efficient than modern units and are more expensive to run and repair. In Calgary's climate, newer systems handle extreme cold more effectively, recover faster from Chinook temperature swings, and offer smart controls for better energy management. Most Calgary businesses recoup upgrade costs through energy savings within a few years.

What is a make-up air unit and does my commercial building need one?

A make-up air unit (MAU) replaces air that is exhausted from a commercial building — such as through kitchen exhaust fans, industrial ventilation, or bathroom fans. Without proper make-up air, negative pressure can cause heating issues, back-drafting of combustion appliances, poor indoor air quality, and drafts. Many commercial buildings in Calgary — especially restaurants, warehouses, and industrial facilities — require make-up air units to meet ventilation code requirements. Next Air can assess your building's needs and install or service commercial make-up air systems.

How do I choose the right commercial HVAC contractor in Calgary?

When choosing a commercial HVAC contractor in Calgary, look for: a contractor who specializes in commercial systems (not just residential), licensed and insured technicians, experience with your specific equipment type and brands, transparent upfront pricing, detailed service reports, strong local reviews, and 24/7 emergency availability. Next Air focuses exclusively on commercial and industrial HVAC, serving businesses across Calgary with certified technicians who know local building codes and Alberta's climate demands.

Lennox Rooftop Units: Reliable HVAC for Calgary Businesses

Lennox is North America’s largest commercial HVAC manufacturer. If your business uses a Lennox rooftop unit, you’re part of a trusted legacy. Thousands of Calgary commercial buildings rely on Lennox systems.
At Next Air, we’ve installed, serviced, and repaired more Lennox commercial systems than any other brand. This guide covers everything about maintaining and optimizing your Lennox RTU.

FAST FACTS: Lennox Commercial RTUs

Most Popular in Calgary: 40% of commercial buildings
Expected Lifespan: 15-20 years with proper maintenance
Efficiency (SEER): 15-18.5 (solid mid-to-high range)
Typical Size: 3-10 ton units (common commercial range)
Installed Cost: $8,000-$18,000 (varies by capacity)
Annual Maintenance: $1,200-$2,000 (4 quarterly services)
Reliability: Proven track record, parts readily available
Next Air Expertise: Deep experience, quick diagnostics

Why Lennox Rooftop Units

Proven Performance in Calgary

Cold Weather Reliability

Designed for Canadian climate extremes
Compressor starts reliably at -30°C
Oil circulation optimized for cold
No special winterization needed (standard maintenance sufficient)

Build Quality

Heavy-duty outdoor construction
Corrosion-resistant materials (important in Calgary’s dry climate)
Components rated for 20+ year lifespan
Proven longevity

Cost-Effectiveness

Lower equipment cost than Carrier
Competitive with Daikin for value
Good ROI over system lifetime
Affordable maintenance parts

Service Availability

Parts stocked at most HVAC suppliers in Calgary
Multiple technicians trained on Lennox
Repair turnaround fast (parts usually same-day)
Support network strong

Popular Lennox RTU Models

Standard Rooftop Units

Lennox XC Series – Entry-level, reliable, SEER 15
Lennox Energence Series – Mid-range, SEER 16-18
Lennox Signature Series – Premium efficiency, SEER 18+

Heating RTUs

Lennox G Series – Gas heating rooftop unit
Lennox Heat Pump Series – Electric heating (growing in popularity)

Maintenance Schedule for Lennox RTUs

Monthly Tasks (DIY)

Visual Check (10 minutes)

Look at unit from ground
Check for debris, leaves, dirt
Listen for sounds
Verify fan operation

Condenser Cleaning (15 minutes)

Remove leaves/branches
Use low-pressure water to rinse
Keep 18 inches clear around unit

Quarterly Professional Service

What We Check Every 3 Months:

Refrigerant pressure and charge level
Electrical connections (corrosion, tightness)
Filter inspection and replacement
Condenser coil condition (visual)
System performance measurement
Ductwork visual inspection

Cost: $300-$600 per service Frequency: 4 services/year (March, June, September, December) Time Required: 1-2 hours

Annual Deep Service

Comprehensive Check (September/October):

Professional coil cleaning (chemical + pressure wash)
Full ductwork inspection and sealing check
Thermostat calibration and testing
Safety inspection (electrical, gas safety if applicable)
Flame sensor cleaning (if furnace component)
Detailed written report with photos

Cost: $600-$900 Benefit: Prevents seasonal issues before heating/cooling season
Total Annual Investment: $1,800-$2,400 Expected Savings: $3,000-$5,000 in prevented repairs + energy efficiency gains

Common Lennox RTU Issues & Solutions

Issue #1: Refrigerant Leaks

Symptoms:

System runs but doesn’t cool/heat efficiently
Oil staining around connections
Hissing sounds
Frost on outdoor unit

Why Lennox RTUs Leak:

Connection corrosion (salt/mineral deposits in Calgary air)
Vibration loosening seals over years
Age-related seal degradation
Poor installation (rare)

Solution:

Call us for leak location
Seal the leak (braze/solder connection)
Evacuate and recharge refrigerant
Test system

Cost: $500-$2,000 (depends on leak location) Prevention: Quarterly maintenance catches small leaks early = big savings

Issue #2: Dirty Coils (Calgary Dust Problem)

Symptoms:

System running but not reaching setpoint
Energy bills climbing
Unit running constantly

Why It Happens:

Calgary’s dry climate = dust/dirt accumulation
Outdoor air + coil cooling = dust sticks
Happens faster than other climates
Even 6 months can show buildup

Solution: Schedule professional coil cleaning

Chemical coil cleaner (EPA-approved)
Pressure wash (low pressure, proper technique)
Compressed air drying
Performance test after

Cost: $200-$400 Payback: Immediate (restores efficiency) Recommended: Annually in Calgary (vs. every 2 years elsewhere)

Issue #3: Electrical Problems

Symptoms:

Unit won’t start
Breaker tripping
Intermittent operation
Burnt smell

Common Causes in Lennox RTUs:

Contactor (relay) failure (common after 10+ years)
Capacitor failure (typical after 8-12 years)
Compressor electrical issue
Wiring degradation

What to Do:

Check breaker (flip to ON if OFF)
If breaker trips again: STOP. Call us
If smell: Evacuate and call emergency

Cost to Fix:

Capacitor: $200-$400
Contactor: $300-$600
Compressor electrical: $1,500-$3,000

Energy Efficiency Tips for Lennox RTUs

Quick Wins (Do This Week)

Filter Changes

Check monthly, replace when gray/dirty
Cost: $15-$40 per filter
Savings: $100-$200/month in electricity

Thermostat Optimization

Winter: 68-70°F during business, 62-65°F after hours
Summer: 76-78°F during business, 82°F after hours
Savings: 3-5% per degree = $100-$300/month

Condenser Cleaning (DIY)

Monthly debris removal
Low-pressure water rinse
Cost: Free
Savings: Prevent efficiency loss

Medium-Term Upgrades (3-6 months)

Upgrade Filters to Higher MERV Rating

Current: Standard MERV 8 filter
Upgrade: MERV 11-13 filter
Cost: $30-$60 per filter (still cheap)
Benefit: Better indoor air quality + slight efficiency boost
Savings: $20-$40/month in energy

Professional Ductwork Sealing

Have us inspect ductwork for leaks
Seal with mastic/tape if leaks found
Cost: $500-$1,500
Payback: 3-8 months (from energy savings)

Lennox RTU vs. Competitors

Feature	Lennox	Amana	Daikin	Carrier
SEER Rating	15-18.5	15-17	18-20	18-19
Lifespan	15-20	15-18	18-20	16-20
Cold Weather	Excellent	Good	Excellent	Excellent
Parts Cost	Low-Medium	Low	Medium-High	High
Service Cost	Low-Medium	Low-Medium	Medium	Medium-High
Installed Cost	$$	$$	$$-$$$	$$$
Best For	Value + reliability	Budget	Efficiency	Premium

Lennox RTU Upgrade Path

If Your Lennox is 12-15 Years Old

Consider upgrading to higher-efficiency model:

Current: SEER 15
New: SEER 18-20
Cost: $15,000-$25,000 installed
Energy savings: $2,000-$3,000/year
Payback: 5-12 years
Federal rebates available: $3,000-$5,000

Your existing unit probably: Still has 3-5 years life left, but efficiency declining

Get Professional Lennox RTU Service

NEXT AIR LENNOX SERVICES:

✓ Emergency repair 24/7 ✓ Quarterly maintenance plans ✓ Professional coil cleaning ✓ Efficiency assessments ✓ Upgrade consultations ✓ System design & installation (if replacing)
CALL NOW: (587) 329-8603 CONTACT US EMERGENCY? 24/7 Available We’ve serviced more Lennox RTUs in Calgary than anyone else. You’re in good hands.

Lennox Rooftop Units: Reliable HVAC for Calgary Businesses

FAST FACTS: Lennox Commercial RTUs

Why Lennox Rooftop Units

Proven Performance in Calgary

Popular Lennox RTU Models

Standard Rooftop Units

Heating RTUs

Maintenance Schedule for Lennox RTUs

Monthly Tasks (DIY)

Quarterly Professional Service

Annual Deep Service

Common Lennox RTU Issues & Solutions

Issue #1: Refrigerant Leaks

Issue #2: Dirty Coils (Calgary Dust Problem)

Issue #3: Electrical Problems

Energy Efficiency Tips for Lennox RTUs

Quick Wins (Do This Week)

Medium-Term Upgrades (3-6 months)

Lennox RTU vs. Competitors

Lennox RTU Upgrade Path

If Your Lennox is 12-15 Years Old

Get Professional Lennox RTU Service

NEXT AIR LENNOX SERVICES:

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