Commercial HVAC Service in Los Angeles — Light Commercial Specialist

Restaurants, dental and medical offices, retail, small warehouses. CSLB C-20 #1138898 covers light commercial systems up to 65,000 BTU per unit. Phones answered 24/7. Truck dispatch 8 AM–8 PM with priority commercial response. Call (424) 766-1020.

Commercial HVAC isn’t just bigger residential equipment. The buildings are different (rooftop access, larger ductwork runs, multiple zones), the equipment is different (RTU, package units, VRF systems), and the service expectations are different (downtime costs revenue, scheduled PM, priority dispatch). We do commercial HVAC for the volume market — restaurants, dental and medical offices, retail, small warehouses, and similar light-commercial facilities up to 65,000 BTU per system. For chiller plants, large boiler installations, or industrial process cooling, we’ll refer you to a C-38 specialist contractor. We don’t pretend to do everything. We do what our C-20 license actually covers, and we do it well.

Industries we serve

Restaurants

  • Kitchen exhaust hood balance with makeup air (challenging in older LA buildings)
  • Front-of-house AC zoning separate from kitchen heat load
  • Walk-in cooler/freezer interaction with ambient cooling
  • Title 24 commercial requirements for restaurant kitchen ventilation
  • Common LA equipment: Carrier 50TC, Trane Voyager, Lennox L Series RTU
  • Typical service: monthly PM contracts during summer, quarterly off-season

Dental and medical office buildings

  • Strict IAQ requirements (MERV 13 minimum, sometimes MERV 14–16 for specific procedures)
  • Independent zoning per exam/treatment room
  • After-hours flexibility for installation (evenings, weekends to avoid patient disruption)
  • Often built post-2010, modern HVAC systems with DDC controls
  • Common equipment: Carrier WeatherMaker 48TM, Trane Precedent

Retail (boutique, specialty stores)

  • Heat gain from lighting, electronics, and customer foot traffic
  • Front-of-house comfort priority (customers don’t shop in 78°F)
  • Energy efficiency for utility bill management
  • Common equipment: standard package units 5–10 ton range
  • Typical service: bi-annual PM, summer priority dispatch

Small warehouses (under 20,000 sq ft)

  • Large open volume cooling (different load calculation than office)
  • Loading dock door air infiltration
  • High roof = different airflow design
  • Common equipment: large RTU 10–20 ton range, sometimes evaporative cooling for less-conditioned spaces
  • Service: quarterly PM, immediate emergency response priority

Medical office buildings, dentistry, urgent care

  • After-hours work to avoid patient disruption
  • Patient-comfort-critical (no system down during business hours)
  • Extra IAQ filtration requirements
  • DDC controls integration

What makes commercial different from residential

Three things commercial customers care about that residential customers don’t:

1. Downtime costs revenue. A restaurant with a failed RTU on Saturday lunch loses $5,000–$15,000 in revenue. An office with no AC sends employees home — productivity loss compounds. We treat commercial emergency calls with priority dispatch and pre-stocked truck inventory for fastest restoration.

2. Scheduled PM contracts. Reactive service (call when broken) costs more long-term than scheduled PM. Standard commercial PM contract: 2–4 visits per year, equipment inspection, filter changes, refrigerant levels, condensate cleaning, electrical tightening, performance verification. Catches problems before they become failures.

3. Energy efficiency = direct utility cost savings. Commercial utility bills are typically 30–50% HVAC. A 10% efficiency improvement on a $5,000/month commercial electric bill is $500/month, $6,000/year. Title 24 commercial requirements (mandatory economizer for RTU over 4.5 tons, demand control ventilation, ASHRAE 90.1 compliance for new construction) drive efficiency improvements. We design systems that meet code while minimizing operating cost.

Title 24 commercial HVAC requirements

The 2025 Energy Code (effective for permits applied January 1, 2026 or later) added significant commercial requirements:

  • Heat pump emphasis: existing retail buildings, schools, offices, and libraries must replace end-of-life RTU with high-efficiency systems including heat pumps when above certain capacity thresholds
  • Mandatory economizer on RTU over 4.5 tons cooling capacity
  • Economizer fault detection and reporting required
  • Demand control ventilation for spaces with variable occupancy (conference rooms, classrooms)
  • Variable air volume (VAV) controls with ASHRAE Guideline 36 sequences
  • Battery storage integration for new buildings with photovoltaic systems
  • Acceptance Test Technician Certification (ATTCP) required for verification

We coordinate with ATTCP-certified test technicians on new commercial installations to ensure code acceptance. For complete California HVAC code reference, see our California HVAC Code 2026 pillar.

Common commercial equipment we install and service

By scale and application:

Rooftop units (RTU) 3–20 tons:

  • Carrier 50TC, 50TFF (premium variable-speed RTU)
  • Trane Voyager Light Commercial (5–25 ton)
  • Lennox L Series, Strategos, Energence
  • York Sun Choice
  • Daikin Rebel (commercial heat pump RTU)

Package units (ground-mounted):

  • Carrier 50PCH heat pump
  • Trane Precedent gas heat / electric cool
  • Mitsubishi City Multi VRF for larger zoned applications

Split systems for offices/retail:

  • Carrier 38AUZ outdoor + 40RU air handler (4–20 ton split)
  • Trane RAUJ outdoor + TWE air handler

Mini-split / VRF for special applications:

  • Mitsubishi City Multi (VRF) for multi-zone office/retail
  • Daikin VRV for larger applications

Commercial maintenance contracts (Comfort Club Commercial)

We offer scheduled PM contracts at three tiers:

Quarterly PM (basic): 4 visits per year. Filter changes, refrigerant levels, condensate cleaning, basic electrical inspection. ~$150–$250 per RTU per quarter for typical 5–10 ton commercial unit.

Bi-annual PM (intermediate): 2 detailed visits per year (spring + fall). Full inspection, performance testing, refrigerant analysis, electrical tightening, drain pan cleaning, fan/blower inspection. ~$200–$400 per RTU per visit.

Premium PM with priority dispatch (most popular): 4 PM visits per year + priority emergency response with guaranteed 90-minute response during business hours. ~$1,200–$2,500 per RTU per year depending on system complexity.

Honest opinion: most LA commercial HVAC chains push the most expensive contract on every customer. We size the contract to the actual risk and downtime cost. A small dental office with one 5-ton RTU and a backup window unit doesn’t need premium dispatch. A 24/7 medical office building does.

Real-world example

Pasadena dental office, 4,200 sq ft, 3 exam rooms + lobby + admin:

  • Existing: 2x Carrier 50TC 5-ton RTU, both 13 years old; one started showing capacitor faults
  • Diagnosis: north RTU compressor losing 15% capacity, capacitor failed once already, refrigerant slow leak at evaporator coil
  • Customer options:
    • Option A: capacitor + leak repair + monitor, $1,250 + 2-year extension on aging unit
    • Option B: replace north unit only, Carrier 50TC 5-ton, $14,800 installed including roof crane
    • Option C: replace both units, matched pair, $26,500 installed
  • Customer chose Option B (south unit still healthy at 11 years)
  • Added bi-annual PM contract for both units, $1,800/year
  • Result: same-day partial cooling restored with portable units while replacement scheduled within 5 business days

Federal IRA Section 25C ($2,000 heat pump credit) is no longer in this math — it expired December 31, 2025 under OBBBA. For commercial rebate detail by utility territory, see our 2026 rebate guide.

How we work with property managers and facility teams

Most commercial HVAC work goes through facility manager or property management company, not building owner directly. Our standard approach:

  • Single point of contact (one of our commercial techs)
  • After-hours/weekend installation when business operations require
  • Detailed invoicing formatted for property management accounting
  • Documentation packets for tenant chargeback
  • 30-day net payment terms for established commercial accounts
  • Coordination with tenant-improvement contractors on TI work

What we cover

Service area for commercial work

All 5 SoCal counties:

CSLB License C-20 #1138898 | Roman HVAC 777 LLC dba Venta Heating & Air | TECH Clean California Certified | Licensed, Bonded, Insured

Frequently Asked Questions

What size commercial systems do you handle? +
Do you offer maintenance contracts for commercial HVAC? +
Can you do after-hours commercial installations? +
Do you handle restaurant kitchen exhaust systems? +
What about chillers for larger buildings? +
Are commercial HVAC rebates available in 2026? +
How fast can you respond to commercial emergencies? +