─ EPA-certified · Commercial HVAC
Commercial HVAC for Southern California properties.
From rooftop units to high-rise chiller plants, our EPA-certified techs keep your building comfortable, compliant, and running at peak efficiency — with a sub-2-hour emergency response anywhere in SoCal.
─ Overview
What hvac services looks like with OH.
OH Building Services delivers full-spectrum commercial HVAC — preventative maintenance, on-demand repair, retrofit, and ground-up installation — across all six Southern California counties. Whether you're managing a single Class-A office tower or a portfolio of retail centers, our techs are EPA Section 608 certified and trained on every major OEM platform.
We don't bounce calls between dispatchers and subs. One PM owns your account, one truck rolls when you need service, and one invoice lands at month-end with photo documentation, refrigerant logs, and Title 24 reporting attached.
Properties on an OH HVAC program report 18–32% lower repair spend year-over-year — because we catch coil fouling, refrigerant drift, and compressor wear before they turn into after-hours emergencies.
─ Why OH for HVAC Services
The difference shows up on day one.
EPA & NATE certified
Every tech holds Section 608 certification. Senior techs are NATE-credentialed for diagnostics.
<2-hour emergency SLA
Real dispatch desk, not a voicemail. Most after-hours calls have a tech on-site in under 90 minutes.
Single PM, full portfolio
Your dedicated account manager knows every unit on every property — no re-explaining the building.
Photo-documented work
Every visit logged with before/after photos, refrigerant levels, and parts used. Audit-ready always.
─ Compare
Why owners switch to OH for hvac services.
Most properties end up juggling a roster of single-trade vendors, an answering service, and a spreadsheet of certificates of insurance. Here's how OH compares.
The OH way
OH Building
Typical
Single-trade vendors
Alternative
In-house staff
100% W-2 employee crews
Background-checked, badged, uniformed, bilingual
Photo-documented QA every visit
Before/after photos and supervisor sign-off, auditable from your phone
24/7 dispatch with <2-hour SLA
Real humans on the desk — not a third-party answering service
Full licensing in-house
B General · C-10 Electrical · C-20 HVAC · C-36 Plumbing · IICRC · CIMS
One PM, one MSA, one invoice
All trades consolidated under a single program
Reserve-study & capital-plan integration
Every component tagged to your reserve study or capex schedule
─ Our Process
From first call to first invoice.
01
Site walk & equipment audit
We catalog every unit — make, model, age, condition — and benchmark current performance.
02
Custom maintenance plan
Tiered cadence by criticality. Quarterly minimum, monthly for chillers and mission-critical.
03
Scheduled deployment
Predictable visit calendar. Tenants notified. Common-area work scheduled around occupancy.
04
Quarterly review
We sit down with you, walk the data, and recommend capital planning 12–36 months out.
─ Industries we serve
HVAC Services for the buildings you run.
─ Related services
Often bundled together.
Electrical & Lighting
Tied to your HVAC load — we right-size service and identify retrofit savings.
Learn moreLeak Detection
Refrigerant and condensate leaks caught before they damage finishes or trigger mold claims.
Learn morePreventative Maintenance Plans
Bundle HVAC with plumbing, electrical, and janitorial under one program.
Learn more─ FAQs
Common questions about hvac services.
Don't see yours? Call us — we like hard questions.
(888) 303-5551Yes — every OH tech holds EPA Section 608 certification (Universal where applicable). Our senior techs are also NATE-certified for advanced diagnostics on chillers, VRF, and BAS systems.
Our standard SLA is sub-2-hour site arrival anywhere in our six-county service area. Most after-hours calls see a tech on-site in under 90 minutes. Healthcare, data center, and life-safety accounts can opt into a 60-minute SLA.
Yes. Our techs are factory-trained on Carrier, Trane, York, Daikin, Mitsubishi, LG, Lennox, Rheem, AAON, and other major commercial OEMs. We stock common parts on every truck.
Absolutely. Title 24 documentation is built into every preventative maintenance visit — economizer testing, refrigerant charge verification, and acceptance test reports are all delivered to you in audit-ready format.
Both. As a B-licensed general contractor with in-house mechanical engineering capability, we handle full HVAC retrofit and replacement projects — from load calculations and equipment selection through permitting, install, and commissioning.
Standalone HVAC vendors often beat us on a single-unit quote — but customers who consolidate HVAC, plumbing, electrical, and janitorial under an OH program report 15–25% lower total facilities spend within 12 months, with significantly fewer emergency callouts.
Yes — IAQ testing is included in healthcare and education programs by default, and available as an add-on for any property. We test for VOCs, CO2, particulates, and microbial contamination.
Ready to upgrade your hvac services?
Free walkthrough, written findings, custom proposal — all within a week.