Commercial HVAC Salt Lake City | Install, Repair, Service

Commercial HVAC Services in Salt Lake County

July 22, 2024. A boutique law firm in downtown Salt Lake’s Gateway district called us about HVAC consistency problems in their 4,800 sq ft office suite. Three Carrier 50TC rooftop units (one serving conference rooms, one serving open workspace, one serving private offices and reception) had been installed by the building developer in 2007 with the original tenant. The current tenant had occupied for 8 years and complained increasingly about: cooling inadequate during afternoon hours, temperature swings between morning and afternoon, partner offices on the south facade reaching 78°F by 3:00 p.m. during summer, conference room consistently 68°F (uncomfortably cool) while open workspace stayed 72-74°F. The systems were still operational but operating at maybe 65-70% of original capacity — aging condenser coils with 17 years of accumulated dust and corrosion, refrigerant levels marginally below spec from gradual losses, control boards becoming less reliable. Diagnostic-and-plan visit took 4 hours: equipment inspection of all three RTUs, ductwork tracing to identify zone separation actual vs. assumed, occupancy load analysis based on current tenant use (heavier than original design), and discussion with office manager about priorities. Recommendation: full replacement of all three RTUs with current-generation equipment, ductwork modifications to redistribute supply registers based on actual occupancy patterns, control system upgrade with zoning between conference rooms / open work / private offices. Total project: $58,400 for 3 RTU replacements ($14,800 average per 5-ton unit) plus $4,800 in ductwork and control system modifications. Phased over 4 weekends to avoid business interruption. Twelve months later: comfort complaints eliminated. Cooling capacity restored to design intent. Annual energy cost reduced 22% from previous patterns. This is commercial HVAC done right — not just replacing failed equipment, but engineering the system to actually serve the current tenant’s needs.

Commercial HVAC service combines technical expertise (light commercial equipment is distinct from residential in capacity, complexity, and code requirements) with business-context awareness (commercial customers care about scheduling around business hours, capital expenditure planning, code documentation, and predictable cost). Our commercial scope covers light commercial up to about 15,000 sq ft total conditioned area — restaurants, professional offices, medical facilities, light retail, multi-unit residential. For broader commercial context see the commercial services hub. This page focuses on commercial HVAC installation, repair, and replacement — the equipment-level work that supports commercial properties.

Commercial HVAC Service Scope

Installation

New installation projects:
New construction commercial HVAC: tenant improvements, new commercial buildings, new restaurant build-outs, expansion or renovation projects. Manual N load calculations for commercial occupancy. ASHRAE 90.1 (energy efficiency) and ASHRAE 62.1 (ventilation) compliance verification. AHJ permits and commercial inspections.
Equipment replacement projects:
End-of-life equipment replacement: aging RTUs, failed commercial boilers, end-of-life split systems. Coordinated phasing for multi-unit replacements (the law firm scenario above). Standardization opportunities for properties with multiple aging units.
System modification projects:
Tenant change-driven HVAC modifications: new office build-outs requiring zoning changes, restaurant kitchen additions requiring ventilation upgrades, medical facility upgrades for higher ventilation standards, retail tenant changes affecting load.

Repair

Light commercial repair scope:
Component-level repair of light commercial equipment: refrigerant repair, electrical repair, control board replacement, blower motor replacement, condenser fan motor replacement, compressor replacement (when warranted economically), economizer repair, ductwork repair, controls repair.
Brand expertise:
Carrier (WeatherMaster RTUs, Carrier Performance split systems, Carrier Greenspeed heat pumps). Trane (Voyager RTUs, Trane XV systems, Trane variable-capacity equipment). Lennox (Strategos RTUs, Lennox Premium variable-capacity equipment). York (Sunline RTUs, York commercial split systems). Goodman, Heil, Tempstar, Rheem commercial.
Mini-split / VRF service:
Mitsubishi VRF systems, Daikin VRV multi-zone, LG Multi V. Commercial-scale ductless systems with up to 50+ indoor heads.

Maintenance

Commercial maintenance plans:
Quarterly visits typical. See the dedicated commercial HVAC maintenance page for plan structure and pricing.

Common Commercial HVAC Scenarios

Professional Office Building HVAC

Equipment typical:
Multiple 3-5 ton rooftop units serving separate tenant suites or zones within a single suite. Common in: strip mall office space, dedicated office buildings, mixed-use developments.
Service considerations:
Coordinated service across multiple units. Tenant access coordination with property management. Comfort issues during business hours typically dominate complaints. Energy efficiency optimization between tenant complaints (each tenant pays utilities; HVAC efficiency directly affects tenant satisfaction).
Common projects:
RTU replacement (5-15 year cycle), economizer service, zoning improvements for individual tenant comfort, control system upgrades.

Restaurant HVAC

Equipment typical:
Dining area: 5-10 ton rooftop unit or split system. Kitchen: Type I hood with makeup air system, separate kitchen HVAC if cooking line is significantly separated from dining. Bar and waiting area: dedicated zone or shared with dining. Restrooms: dedicated exhaust per code.
Service considerations:
Type I hood operation creates significant negative pressure; makeup air must match. ASHRAE 62.1 ventilation requirements for dining occupancy. Kitchen exhaust coordination critical for kitchen comfort and code compliance. Refrigeration condensers (walk-in coolers, freezers) coordinate with HVAC for kitchen heat load.
Common projects:
Makeup air system replacement, kitchen exhaust modifications, hood compliance documentation, dining HVAC replacement.
Priority response:
Restaurant HVAC failures during business hours have immediate revenue impact. Restaurants on commercial maintenance plans get 2-hour priority dispatch.

Medical Facility HVAC

Equipment typical:
Higher-capacity systems than equivalent square footage office. ASHRAE 170 (medical facility ventilation standard) compliance required.
Service considerations:
Higher ventilation rates (typically 4-12 air changes per hour depending on space type). MERV 13 filtration minimum. Temperature and humidity tighter control than typical commercial. Critical-uptime considerations for patient care areas. Specific room types have different requirements (exam rooms, procedure rooms, waiting areas, restrooms).
Common projects:
Equipment replacement with ASHRAE 170 verification. Ventilation upgrade for code compliance updates. IAQ improvements (HEPA filtration for sensitive applications). Backup power coordination for critical-uptime equipment.

Multi-Unit Residential

Equipment typical:
Each unit has its own HVAC equipment (typically 2-3 ton residential-tier systems). Common area equipment may be separate (lobby, hallways). 4-unit through 12-unit complexes most common in our service area.
Service considerations:
Coordinated service across units. Property manager interface. Tenant access coordination. Capital planning for staggered or simultaneous replacement of multiple aging units. Insurance and code compliance for multi-family properties.
Common projects:
Coordinated multi-unit replacement (Jordan Whitmer’s 4-unit scenario from the commercial hub page). Standardization of equipment platforms for multi-property portfolios. Maintenance plan coordination.

Light Retail HVAC

Equipment typical:
Strip mall units typically use 3-5 ton rooftop units, sometimes shared between adjacent storefronts via zone control. Boutique retail in mixed-use buildings often uses RTUs accessed via roof.
Service considerations:
Property management coordination. Tenant access during business hours. Comfort important for customer experience. Customer-facing displays and merchandise may have specific climate needs (electronics retailers may want lower humidity; clothing retailers may have specific temperature requirements).

Commercial Equipment Specifics

Rooftop Units (Detailed on Dedicated Page)

RTU service is the largest category of commercial HVAC work in our service area. See the dedicated rooftop units page for full equipment detail, brand-specific service, and pricing.

Commercial Split Systems

Indoor air handler + outdoor condenser configurations:
3-20 ton capacity range. Used when rooftop placement isn’t ideal (architectural restrictions, weight load limitations, or specific equipment availability concerns).
Brands:
Carrier WeatherMaker series, Trane Voyager, Lennox Premium, York Affinity. Higher tier than residential split systems; designed for commercial runtime expectations.
Cost range:
$14,800-$48,800 installed depending on capacity (3-20 ton range).

Commercial Mini-Split (VRF) Systems

Variable Refrigerant Flow systems:
Multiple indoor heads connected to one or more outdoor units via refrigerant line set. Significantly more efficient than traditional commercial split systems. Best for: office buildings with multiple suites, hotels with individual room control, retail spaces with multiple zones, restaurants with separate dining/kitchen control.
Brands:
Mitsubishi VRF, Daikin VRV, LG Multi V. Cold-climate options available for Salt Lake’s heating-dominant climate.
Cost range:
$28,800-$84,000 typical commercial installation. Highly variable based on indoor head count, system capacity, and integration complexity.

Commercial Boilers (Hydronic Heating)

Light commercial hydronic systems:
199-999 MBH capacity range. Modulating-condensing high efficiency standard for commercial new installation. Cast-iron sectional for replacement of older systems where modulating-condensing isn’t economical.
Brands:
Viessmann Vitodens 222-W (light commercial combi) and Vitodens 333-F (light commercial heat-only), Weil-McLain SlimFit, U.S. Boiler Alpine series, Buderus GB142, Navien NCB-H series combi.
Applications:
Small office buildings, multi-unit residential with shared boiler, restaurants with hydronic heating, professional offices, historic buildings preserving original radiator distribution.
Cost range:
$14,800-$48,800 depending on capacity and configuration. Premium tier (Viessmann Vitodens): $24,800-$68,000.

Commercial Heat Pumps

Cold-climate commercial heat pumps:
Larger-capacity heat pump systems for commercial applications. Cold-climate operation to -10°F for typical Salt Lake County applications. Multi-zone capability for varying tenant requirements.
Best applications:
Office buildings prioritizing electrification, multi-tenant buildings with varying occupancy patterns, retail with high ventilation needs, sustainability-focused property portfolios.
Cost range:
$24,800-$84,000 depending on capacity and configuration. Significant rebate availability through Rocky Mountain Power Wattsmart commercial program.

The Commercial Installation Process

  1. Initial assessment. Property visit with property manager and/or tenant. Existing equipment inventory. Building characteristics review (occupancy patterns, ventilation requirements, energy efficiency goals). Operating concerns identification.
  2. Manual N load calculation. Commercial equivalent of residential Manual J. Calculates heating and cooling loads based on actual building characteristics, ASHRAE methodology, and current occupancy patterns. Output: required BTU/hr capacity by zone and total.
  3. System design. Equipment selection (capacity, efficiency tier, brand). Distribution design (ductwork, hydronic piping, refrigerant lines). Zoning and control strategy. Code compliance verification (ASHRAE 90.1, 62.1, sometimes 170; IBC for commercial structural; local AHJ amendments).
  4. Quote and proposal. Written proposal within 5-10 business days for complex commercial projects. Itemized: equipment, labor, electrical work, structural modifications if needed, permits, commissioning, warranty information, projected operating costs, energy efficiency benefits.
  5. Permits and equipment ordering. Commercial permits with AHJ. Equipment typically requires 4-12 weeks lead time for commercial-tier equipment. Coordination of trades (electrical, structural, controls).
  6. Installation execution. Project duration typically 4-15 business days depending on scope. Phased to minimize business interruption (after-hours work, weekend work, holiday scheduling). Coordination with property management and tenants.
  7. Commissioning. Equipment performance verification per manufacturer protocols. Energy benchmarking baseline. ASHRAE 90.1 compliance verification. Documentation for AHJ inspection and tax filing.
  8. AHJ inspection. Commercial inspections typically more thorough than residential. May require multiple inspections at various project stages.
  9. Documentation delivery. Operating manuals, warranty registration, AHRI certificates, combustion analysis reports (gas equipment), refrigerant charge reports, controls programming documentation. Comprehensive documentation suitable for property records and tax filing.
  10. Maintenance plan setup. Commercial maintenance plan initiated for new equipment. Schedule first service visit typically 6-8 weeks after commissioning for first review.

Pricing Reference (Q2 2026)

RTU replacement (most common commercial project):
  • 3-5 ton single-stage: $8,400-$13,800 per unit installed
  • 3-5 ton two-stage: $11,400-$18,400 per unit installed
  • 5-10 ton: $14,800-$28,400 per unit installed
  • 10-15 ton: $24,800-$48,800 per unit installed
Commercial split system replacement:
$14,800-$48,800 installed depending on capacity (3-20 ton). Includes equipment, electrical work, ductwork modifications, controls.
Commercial VRF system installation:
$28,800-$84,000+ depending on capacity and zone count. Smaller systems (4-6 zones) starting around $28,800. Larger systems (20+ zones) can reach $84,000-$140,000.
Commercial boiler replacement:
$14,800-$68,000 depending on capacity (199-999 MBH) and configuration. Premium tier (Viessmann): higher end of range.
Commercial repair labor:
$145-$240/hour depending on technician level and equipment complexity. Premium for after-hours and emergency dispatch.
Commercial diagnostic visit:
$125-$245 per visit (credited toward authorized repair).
Tax considerations:
Section 179 deduction available for commercial HVAC equipment up to $1.16M annually. Bonus depreciation. Investment Tax Credit (ITC) for qualifying renewable energy applications. Documentation provided for tax filing; consult your CPA for specific tax treatment.
Rocky Mountain Power Wattsmart commercial rebates:
$400-$1,200 per ton for high-efficiency commercial equipment. Filed within 30 days of commissioning. Processing 6-12 weeks. Larger commercial projects may qualify for custom rebate programs.

What Sets Quality Commercial Service Apart

Brand-specific commercial certification:
Carrier WeatherExpert Specialist (commercial RTU certification). Trane Comfort Specialist commercial track. Mitsubishi VRF certification. Each requires technical training beyond standard residential EPA 608 certification.
ASHRAE compliance expertise:
Understanding of ASHRAE 90.1 (energy efficiency), 62.1 (ventilation), 170 (medical facility ventilation). Verification at installation that compliance is documented and maintained throughout equipment service life.
Code compliance documentation:
Commercial work requires documented code compliance. We maintain documentation suitable for AHJ inspections, insurance audits, and tenant complaint resolution.
Property manager interface:
Multi-tenant properties require coordination with property managers. Single point of contact reduces friction. Tenant access coordination, scheduling around business operations, communication about disruption — all handled through dedicated property manager liaison.
Capital expenditure planning:
Commercial property owners need 3-5 year capital planning visibility. Annual condition reports, predictive maintenance findings, and replacement timing recommendations support capital budgeting.
After-hours and weekend service:
Commercial work often happens after business hours or weekends to minimize tenant disruption. Our commercial techs maintain availability for after-hours and weekend work without premium pricing for maintenance plan members.
Commercial trade coordination:
Large commercial projects coordinate with: electricians (three-phase service, panel upgrades, controls wiring), structural engineers (roof load calculations for RTUs), control systems integrators (building automation, BMS), permit expediters, building inspectors. Single-point coordination simplifies project execution.

Frequently Asked Questions

What kind of commercial properties do you service?
Light commercial up to about 15,000 sq ft total conditioned area: small office buildings, multi-unit residential (apartments, duplexes, fourplexes), restaurants, light retail, professional offices, medical offices, light industrial. We don’t handle large commercial (chillers, large rooftop units serving 20,000+ sq ft) or industrial process cooling.
How long do commercial HVAC installations take?
Equipment replacement: 1-3 business days per unit for typical 3-10 ton RTU. Multi-unit projects: 1-2 weeks per phase. VRF installations: 2-4 weeks depending on complexity. Larger commercial projects: 4-15 business days typical. Phased to minimize business interruption.
Do you do new construction commercial HVAC?
Yes, for light commercial new construction projects (typically up to about 15,000 sq ft total conditioned area). We work with general contractors and developers on tenant improvements, new commercial buildings, and renovation projects. Larger commercial new construction (typically over 30,000 sq ft) we refer to specialized large-commercial contractors.
What’s the warranty on commercial equipment?
Manufacturer warranty: typically 5-10 years parts on commercial equipment. Compressors often 10-12 years. Labor warranty: typically 1-2 years through manufacturer. Extended warranty programs available for premium equipment. Documented professional installation required to maintain warranty validity.
Can you work with our existing commercial maintenance provider?
Yes. Many commercial properties have existing maintenance relationships and need only specialized expertise for installation or major repair. We coordinate with existing service providers, share information about installations, and maintain communication for ongoing maintenance handoff. Some properties prefer single-vendor consolidation; we can support that or work alongside other providers.

Schedule Commercial HVAC Consultation

Initial commercial site visits and service proposals at no cost. Multi-property portfolios welcomed. Existing tenant occupancy coordinated throughout the project.

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  • Emergency Service: 24 hours a day, 7 days a week
  • Office Staff: Monday – Friday, 8:00 AM – 5:00 PM
  • Closed: Weekends and State/Federal Holidays (emergency line always active)

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