Longmont, Colorado (983) 213-7136
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Which rooftop unit is next?

Two questions sort every unit on your roof: how old is it, and what shape is it in? The answers put each one in one of four boxes — and give you a replacement order you can budget.

The four boxes

Age across, condition up.

Below is an illustrative building with eight rooftop units. Your plan has your own units, with notes and photos for each.

  • Newer · poor condition

    Investigate

    A young unit should not be struggling. Before replacing anything, find out why: undersized ductwork, a bad install, a unit that was never commissioned, hail.

    • RTU-6
  • Older · poor condition

    Replace first

    Past the middle of its expected life and showing it: cracked heat exchanger, failing compressor, rusted-through cabinet. These top the list, and we say so plainly.

    • RTU-2
    • RTU-7
  • Newer · good condition

    Maintain

    Keep it clean, keep it serviced, write down what you find. Most of a healthy building lives here.

    • RTU-1
    • RTU-4
    • RTU-8
  • Older · good condition

    Plan & budget

    Still working well, but not forever. Put it in a future year's budget and keep servicing it — no need to replace a unit that is doing its job.

    • RTU-3
    • RTU-5

Illustrative example — the unit names and positions are made up to show how the plan reads. No prices or lifespans are implied.

How condition is judged

What we look at on each unit.

Heat exchanger
On gas units, inspected for cracks and corrosion. A cracked heat exchanger is a safety issue, not a budgeting one.
Compressor & refrigerant
Running amps, pressures and signs of past leaks or repeated recharging.
Coils
Condenser fins flattened by hail or clogged with cottonwood; evaporator coil cleanliness.
Cabinet & curb
Rust, missing panels, water getting in, and whether the roof curb still seals.
Controls & electrical
Economizer operation, thermostats, contactors, capacitors and wiring.
History
Repair records, run hours and how often it has let you down.
A technician with a flashlight inspecting the heat exchanger through an open panel of a gas rooftop unit

Age is a starting point, not a verdict

We estimate where each unit is in its working life from its type, nameplate date, run hours and history. A well-kept older unit can outlast a neglected newer one.

What you get

One plan, three parts.

  1. The unit list

    Every rooftop unit with its tag, location on the roof, nameplate details and photos.

  2. The four boxes

    Each unit placed by age and condition, with a sentence on why it is there.

  3. The order

    A suggested replacement sequence by year, with the reasons — for you to budget, not a sales quote.

A crane lifting a new rooftop unit onto a commercial roof on a clear morning, a technician guiding it onto the curb
Planned replacements are scheduled with the crane, the permit and your hours in mind — not on the hottest day of July.
Front Range specifics

Hail, cottonwood and wind.

Longmont's rooftops take a beating. Summer hail flattens coil fins. Cottonwood fluff in late spring clogs condenser coils. Winter wind drives snow into poorly sealed cabinets. All three show up in the condition score — and all three are things maintenance can catch early.

After a hailstorm, we can walk the roof and document what we find, with photos, for your records or your insurer.

A technician photographing a rooftop unit's condenser coil with a tablet during a roof survey
Homes

The same thinking, for one furnace.

A house has one or two systems rather than eight, but the question is the same. If your furnace or air conditioner is getting older, we will tell you honestly which box it is in — keep maintaining it, start budgeting, or replace it before winter.

Start the plan

Get your roof on one page.

Tell us the address and roughly how many units. We will arrange a roof visit.

Call Get a quote