Commercial HVAC Installation and Rooftop Unit Replacement

The swap itself is usually the shortest part. Planning, equipment ordering, crane scheduling and the permit take longer, and they vary with unit size, curb fit and manufacturer lead times. We give you a realistic schedule with the quote, including when the building will be without heating or cooling, so you can plan staff and customers around it.

Often, but not always. California's 2025 Energy Code, in effect for permits applied for since January 1, 2026, pushes many nonresidential rooftop unit replacements toward heat pump equipment, with requirements that depend on unit size and building type. Economizer and fault detection rules also apply to many units. We check what your permit will require before quoting, so there are no surprises at plan check.

The curb is the frame the rooftop unit sits on, with openings that connect to the supply and return ducts below. Older curbs often don't match the footprint of a new unit, even from the same brand. An adapter bridges the old curb to the new unit without cutting a new roof opening, which saves roof work and keeps the existing duct connections. We measure during the site visit so we know before ordering.

Sometimes. Smaller units on single-story buildings can often go up with a lift, and we own a 50-foot lift for that. Larger units, taller buildings or roofs without good access need a crane, which we coordinate along with any street or sidewalk permit the city requires. We will tell you ahead of time if parking spaces or an entrance need to be blocked off for the lift.

Yes. For a tenant improvement we can work from the architect's plans, or lay out the system ourselves for simpler spaces, including new rooftop units or splits, duct changes, and thermostats or zoning for the new floor plan. We coordinate with the general contractor's schedule and the city's inspections. Our commercial ductwork page covers the duct side of TI work.