Every rooftop unit eventually reaches the point where the next repair isn't worth it. The trick is recognizing that point before the unit picks it for you, usually on the hottest afternoon or coldest morning of the year. Here's what the data says about RTU lifespan, what shortens it in Colorado, and how to think through repair versus replacement.
How long do commercial rooftop units last?
A commercial rooftop unit typically lasts about 15 to 20 years. A few reference points:
- The U.S. Department of Energy has described packaged rooftop units as having a typical life of 15 to 20 years.
- ASHRAE's long-standing equipment life table lists a median service life of 15 years for rooftop air conditioners (single-zone and multi-zone).
- ASHRAE's public service-life database shows a median age of 16 years for the in-service packaged rooftop DX units in its sample.
"Median" is the key word. Half of units outlast that number and half don't. Maintenance, installation quality, how hard the unit works, and the environment it lives in all push a specific unit one way or the other.
Why Colorado is hard on rooftop units
Rooftop equipment along the Front Range deals with a combination of stresses that ground-level equipment in milder places doesn't:
Intense sun at altitude. Colorado Springs sits around 6,000 feet. Stronger UV at elevation ages wire insulation, seals, gaskets, and cabinet coatings faster.
Freeze-thaw cycling. NOAA engineering weather data for the Colorado Springs airport lists an average of about 124 freeze-thaw cycles a year. Each cycle expands and contracts metal, refrigerant lines, and electrical connections a little, and over years that works joints and seams loose.
Hail. The Front Range is known for hail. The National Weather Service recorded 3-inch hail over southern Colorado Springs and Fountain on June 13, 2018, and 3- to 4-inch hail in southern Colorado Springs that August. Hail bends condenser fins (which cuts airflow and capacity) and can damage panels and electrical parts.
Long heating seasons and hot summers. Colorado Springs' normal year includes nearly 5,900 heating degree days, and lower, hotter places like Pueblo average about 72 days a year at 90°F or above. Units here run hard in both seasons.
None of this means a Colorado RTU is doomed to die young. It means preventive maintenance matters more here, and that the "15 to 20 years" range is a range for a reason.
Signs your RTU is near the end
- Age. Once a unit is in the 15 to 20 year range, every major repair deserves a second look.
- Repeat breakdowns. Multiple service calls a season, or the same problem coming back.
- Repair bills stacking up. Add up the last two or three years of repairs on that unit. The total is often eye-opening.
- It can't keep up. Rooms that are too hot or too cold even when the unit runs nonstop.
- Parts are getting hard to find. Older or discontinued models can mean long waits or expensive parts.
- Old refrigerant. Units built for R-22 are a special case. Under EPA rules, production and import of R-22 ended on January 1, 2020, so servicing those systems depends on limited recovered or stockpiled refrigerant. A refrigerant leak on an R-22 unit is often the moment replacement wins.
- Major component failure. A failed compressor or a cracked heat exchanger on an older unit usually tips the decision toward replacement.
When repair still makes sense
Not every problem on an older unit means replacement. Capacitors, contactors, belts, igniters, flame sensors, and blower motors are normal wear parts. Replacing one on a unit that's otherwise in good shape is usually the right call, and it's what our commercial rooftop unit repair team handles. The question isn't "is it old?" but "is this repair buying reliable years, or just getting us to the next breakdown?"
Planning beats emergencies
The Department of Energy has pointed out that rooftop units are often replaced only after they fail, and that the urgency tends to lead to installing a new version of the old unit rather than choosing the best option for the building. When you plan a commercial rooftop unit replacement ahead of time, you can:
- right-size the replacement instead of copying the old unit's label,
- consider higher-efficiency equipment and better controls (DOE has reported that advanced controls retrofits can substantially cut RTU energy use, and that early replacement with a high-efficiency unit can save even more compared with older standards),
- schedule the crane and the work around your business hours, and
- budget for it, or line up financing, instead of scrambling.
Buildings that went up around the same time, which is common in fast-growing towns like Castle Rock, often have several units aging on the same timeline, which makes a unit-by-unit plan even more valuable.
Get a straight answer
Our free RTU assessment is a no-obligation, on-site look at your rooftop units. A technician checks condition and operation and tells you plainly which units are worth repairing, which should be on a maintenance plan, and which are living on borrowed time, with a written quote when replacement makes sense.
If replacement is the right move, commercial HVAC financing through Optimus is available to qualifying businesses, with financing options from $5,000 to $1,000,000. See financing options or call 719-521-3755, 24/7. We also serve Cañon City and the rest of southern Colorado's Front Range.
Sources
- I.C.E. Heating & Cooling, Commercial Rooftop HVAC Repair and Replacement in Colorado Springs (15 to 20 year service life; Colorado UV, hail, and temperature-swing effects)
- U.S. Department of Energy, Rooftop Unit Campaign overview (2013)
- ASHRAE equipment life expectancy table, summarized at Rivet Energy Partners; ASHRAE Service Life Database
- NOAA NCEI, Engineering weather data for Colorado Springs (KCOS)
- National Weather Service, Summer 2018 hail storms and Colorado Springs climate summary
- Wikipedia, Pueblo, Colorado (climate statistics)
- U.S. EPA, Phaseout of Class II ozone-depleting substances (R-22)