Rooftop units, package systems, and more
Most commercial buildings in Fresno rely on rooftop packaged units rather than residential split systems — different equipment, different failure points, different scheduling needs.
Rooftop package units
The most common commercial setup in the Central Valley. We service and replace packaged rooftop units for offices, retail, and light industrial spaces.
Restaurant & retail HVAC
Kitchens generate extra heat load, and retail spaces need consistent comfort during business hours. We size and service systems for the actual load your business generates.
Preventive maintenance contracts
Scheduled tune-ups catch small problems before they become closures. We work with property managers and business owners on recurring maintenance plans.
Scheduled around your hours, not ours
A residential appointment window doesn’t work for a business that can’t close mid-day. We schedule commercial service calls — repair, replacement, or maintenance — around your actual operating hours, including after-close or before-open windows when that’s what keeps you running. Every diagnostic is documented on video, the same standard we hold for residential work, so property managers and business owners get a clear record for their own maintenance files. That record matters more in a commercial setting than a residential one — a multi-tenant property or a restaurant with health inspections needs documentation it can actually produce later, not a verbal summary from whoever answered the service call.
What Fresno customers say
4.8 stars across 1,200+ verified Google reviews — Fresno, Clovis, Madera, Sanger, Selma, and surrounding Fresno County cities.
Three companies gave me quotes without even looking at the system. Grandmark ran a diagnostic and found the real issue. Saved me over $2,000 and my system has been perfect ever since.
Tony and his partner did an incredible job and completed the work in a timely manner. They found an issue created by another company that could’ve set my home on fire.
Very professional, detailed and friendly. Diagnosed the problem quickly and had it fixed the same day. Tune-up price was reasonable.
We’ll respond in 20 minutes or less
Tell us about your building, system, and scheduling constraints. During business hours, that’s typically within 20 minutes.
Commercial HVAC FAQ
Do you work with property managers, not just business owners?
Yes — we regularly work directly with property management companies on tenant HVAC issues, and can set up recurring maintenance contracts covering multiple units or properties.
Can you schedule service outside our business hours?
Yes. We schedule commercial calls around your actual operating hours, including before-open or after-close windows when a mid-day shutdown isn’t an option.
Do you service rooftop package units?
Yes — rooftop packaged units are the most common commercial HVAC setup in Fresno, and we service, repair, and replace them regularly across office, retail, and light industrial spaces.
Do you offer maintenance contracts for commercial properties?
Yes. Scheduled preventive maintenance catches small issues before they cause an unplanned closure — ask about setting up a recurring plan for your building or portfolio.
More ways we help Fresno businesses
New Construction HVAC →
Building new? See how we size systems for ground-up commercial and residential construction.
Fresno HVAC Hub →
Every HVAC service we offer, all in one place.
X-Ray Diagnostic Process →
See how our diagnostic process finds the real cause before we quote anything.
Get a commercial HVAC quote
Flexible scheduling around your business hours. Video-documented diagnostics. Maintenance contracts available.