Replace rooftop units without losing a business day.
Estimate the tonnage your building needs, see whether your current units are worth repairing, and plan an after-hours change-out with the crane, the curb and the roof handled together.
- Right-sized units from a commercial load calculation
- Crane lifts and change-outs done after hours
- Curb and roof flashing coordinated with Advanced Roofing
Request an RTU assessment
Tell us about the building and the units. We will follow up to set up a site visit.
Old rooftop units fail when the building needs them most
In Florida, rooftop units work hardest in the hottest, most humid months. Units past their service life tend to fail then, when equipment, crews and cranes are hardest to book.
Emergency change-outs cost more
A unit that fails in July means rush equipment, overtime crews and a crane booked at short notice.
A planned replacement avoids the premium.
R-22 repairs that don’t add up
R-22 hasn’t been produced in the US since 2020. Every leak repair depends on scarce reclaimed refrigerant.
Repair money goes into equipment with no future.
Comfort and humidity complaints
Worn or oversized units short-cycle, leaving spaces cold, clammy and loud.
Tenants and staff notice before anyone checks the roof.
How many tons, and is it time to replace?
The example is a 12,000 sq ft office with 17-year-old R-22 units totaling 40 tons, and three service calls this year. Change any value.
- Estimated cooling load
- Your current capacity
- Floor area per ton
- Typical life left
How these numbers are estimated
- Florida rules of thumb: office 350, retail 300, medical and school 275, restaurant 200, conditioned warehouse 600 sq ft per ton.
- Ceilings over 10 ft add 8–18%. The range shown is ±15%.
- Rooftop units in coastal Florida commonly last 12–15 years.
Send these results with your request and we will confirm sizing with a site survey and load calculation.
Rule-of-thumb sizing for planning only. Equipment is selected from a commercial load calculation and a site survey, which also show whether existing units are oversized.
Equipment, crane, curb and controls handled together
Most RTU delays happen at the edges of the job: a curb that doesn’t fit, a crane that isn’t booked, a roof that wasn’t flashed. We plan those up front.
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Load calculation
A Manual N load calculation right-sizes equipment instead of matching the old nameplate, which is often oversized.
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Curb adapters
Adapters or new curbs fitted to the existing roof opening, so ductwork stays where it is.
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Crane lift, after hours
Lifts and change-outs scheduled nights or weekends, with power, gas and controls reconnected before opening.
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Roof flashing coordination
Curb flashing and any membrane work coordinated with Advanced Roofing so the roof warranty is protected.
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Controls and BAS
Thermostats, economizers and building automation reconnected and tested, with setpoints documented.
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Start-up and maintenance
Factory start-up, commissioning report and a maintenance agreement from day one.
How a change-out runs
Planned around your building’s hours, so the change-out happens when nobody is inside.
Survey
Site visit, load calculation, curb measurements and photos of electrical, gas and controls.
Select and submit
Equipment selection, submittals, permit and a crane plan with street or lot closures if needed.
Overnight set
Old units out, new units set and reconnected after hours; the building opens on schedule.
Start-up
Factory start-up, air balance check, controls test and a written handoff.
Rooftop change-outs across Florida
From grocery stores to government headquarters, we plan the equipment, the crane and the roof work together.
Publix
2 × 50 tons
Two new 50-ton Daikin rooftop packaged units, lifted with a 300-ton hydro crane from the Advanced Crane Division.
Hillsborough County Sheriff’s Office
44 rooftop units
44 rooftop units replaced at the new headquarters, run from our Tampa branch with Lennox and Liebert.
Coral Square Mall
3,500 ft of lines
Curbs extended on every package unit and 3,500 ft of conduit and condensate lines raised to meet code.
“Our HOA recently completed a full HVAC replacement project and the experience with Jeffrey Rhode was exceptional from start to finish.”
Homeowners associationGoogle review
“After another HVAC company told us our unit was going to break and needed replacing, we called Advanced Air Systems for a second opinion. I am so glad we did.”
CustomerGoogle review
“Paul went above and beyond professional, attentive, and genuinely dedicated to ensuring everything was done right.”
CustomerGoogle review
Common questions
Don’t see your question? Talk to a project manager.
How many tons of cooling does my building need?
A common Florida starting point is about one ton per 300–350 sq ft for offices and retail, and less floor area per ton for restaurants. Final sizing comes from a commercial load calculation.
Should I repair or replace my rooftop unit?
Replacement usually makes sense when units are near or past 15 years in coastal Florida, run on R-22, or need repeated repairs. The check above gives a quick read.
What refrigerant do new units use?
New commercial packaged equipment is moving to lower-GWP refrigerants such as R-454B and R-32 under EPA rules. Your proposal lists the refrigerant for each unit.
Can the work happen after business hours?
Yes. Crane lifts and change-outs are routinely scheduled at night or on weekends so the building opens on time.
Does the roof need work when units are replaced?
Often the curb flashing does. We coordinate with Advanced Roofing so the roof stays watertight and warranted.
Can you work with our existing controls?
Yes. Thermostats, economizers and building automation connections are reconnected and tested at start-up, with setpoints documented.
Plan your rooftop unit replacement
Send the address and the number of units. We will survey the equipment, run a load calculation and send a replacement plan.
2100 NW 21st Ave, Fort Lauderdale, FL 33311
Mon – Fri: 8:00 am – 5:00 pm
Fort Lauderdale · Miami · West Palm Beach
#CMC1251466
What happens next
- We call you back. A project manager reviews your request and confirms the details
- We visit the site. We look at the building, the roof or equipment, and access
- You get a written proposal. Scope, schedule and price in writing, with no obligation