Rooftop unit replacement
Rooftop unit replacement for offices, retail and industrial buildings: the unit sized to the building rather than to the old nameplate, the crane and street closure handled, and the new unit running by end of day with the controls tied in.
Rooftop unit replacement, the way we actually do it.
The unit coming off the roof was sized twenty years ago, possibly wrong, for a tenant who is gone. We start with a load calculation on the current building and tenant, and the proposal shows the number. About one in four replacements we do is a size smaller than what came off, which costs the owner less to buy and less to run.
Crane day is the whole job. We pull the street or lot closure permit, schedule the crane, notify tenants, and have the curb adapter, electrical disconnect and gas or refrigerant piping staged. Units come off and go on in sequence. Most buildings have cooling again before 5pm.
Controls and economizers
A new unit on an old thermostat is half a replacement. We tie each unit into the existing building controls or install new, verify the economizer actually opens, and leave the setpoints documented. Utility rebates for high-efficiency units are filed by us.
Multi-unit programs
For owners with twenty roofs, we build a replacement program: units ranked by age, condition and repair history from our maintenance data, replaced on a schedule the budget can carry.
What happens, in order.
So you know what to expect from the first call to the last walk.
Survey and load calc
Roof walk, unit condition, current loads calculated; proposal with the sizing shown.
Submittals and permits
Equipment submitted; mechanical permit and street or lot closure pulled.
Crane day
Tenants notified; units off and on in sequence; electrical and gas reconnected; start-up.
Controls and rebate
Thermostats or BAS tied in, economizer verified, settings documented, utility rebate filed.
The numbers a buyer asks for.
| Unit range | 3–50 tons packaged; split systems to 20 tons |
| Manufacturers | Carrier, Trane, Daikin, Lennox commercial |
| Crane | Scheduled and permitted by Summit Air |
| Typical duration | 1 day per 4–6 units |
| Rebates | SRP and APS high-efficiency programs filed |
| Warranty | 5-year compressor, 1-year labor, extended available |
Questions about rooftop unit replacement.
How long will the building be without cooling?
Usually a few hours per unit, during the day it is changed. We schedule tenant-sensitive spaces first and work in sequence so no one is down all day.
Do you handle the crane and permits?
Yes, all of it: crane, street closure, mechanical permit, and the tenant notice.
Can you replace a unit with the same size to save time?
We can, but we will show you the load calc first. One in four of our replacements is a smaller unit than what came off.
Need rooftop unit replacement? Tell us about the job.
A project manager replies the same business day. Maintenance clients reach a technician on the 24-hour line.