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Seamless Rooftop Unit Installation & Replacement in Longmont

Your building depends on a reliable rooftop HVAC unit to keep people comfortable through Longmont, CO heat, hail, wind, and cold snaps. If you need safe rooftop unit installation or a clean changeout, ASI is ready to help today. Call 970-344-5063 to schedule a friendly, no-pressure visit, or learn more about our HVAC company in Longmont.

For dependable Rooftop Unit Installation & Replacement in Longmont, CO, choose a team that plans every detail and treats your roof with care.

Rooftop Unit Installation & Replacement

Rooftop Unit Installation & Replacement In Longmont, CO

Rooftop units, often called RTUs or package units, sit on a curb on your roof and deliver heating, cooling, and ventilation to the space below. When installed or replaced the right way, they offer strong efficiency, simple service access, and a smaller footprint inside your building. As your local HVAC company, ASI installs new systems and replaces aging RTUs with a focus on safety, airflow, and long-term value.

Every roof and tenant mix is different. We look at your duct layout, electrical service, gas line routing, if needed, and the curb dimensions that support the unit. We also verify clear crane access and staging so the lift day is smooth and brief. The result is a rooftop system that fits your building, balances your zones, and runs quietly.

  • Right-sized capacity for steady comfort and lower energy use
  • Reliable heating and cooling with balanced supply and return air
  • Cleaner install with curb adapters that protect roof integrity
  • Safer changeout steps that reduce downtime for your staff or tenants
  • Simple maintenance access so routine service is fast and affordable

Local Tip: Longmont's sunny, high-altitude climate can be hard on rooftop equipment. UV exposure and big temperature swings can age belts, economizer seals, and wiring. A quick seasonal check before summer and winter helps prevent mid-season surprises.

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Benefits Of A New Rooftop Unit

Replacing a tired or oversized RTU does more than cool and heat better. It can tighten comfort, lower bills, and cut noise. Newer models also offer smarter fan control and better dehumidification, which helps offices, restaurants, retail spaces, and light industrial areas feel steady and clean.

  • Improved efficiency with modern compressors and fan motors
  • Quieter operation for offices, classrooms, and open floor plans
  • Better ventilation options with economizers and filtration upgrades
  • Smoother comfort thanks to staged or variable output
  • Cleaner air when paired with quality filters sized for your system

Fast scheduling and clear timelines keep your project on track. Our team communicates what to expect at each step, from the site walk to start-up, so you can plan around the work with confidence.

How Our Rooftop Unit Replacement Works

We keep the process simple and predictable. Here is how a typical project moves forward and what you can expect from ASI:

  1. On-site assessment. We review roof access, curb size, duct connections, gas and electrical, and any ventilation needs inside your space. We also note local wind and snow considerations that affect placement and attachment.
  2. Right-size and options. We run a load review and discuss efficiency levels, filtration upgrades, and control choices. We recommend models that balance comfort, reliability, and budget.
  3. Proposal with a clear scope. You receive a written scope that outlines equipment, curb adapter needs, crane plan, and the expected timeline. No hidden steps.
  4. Crane coordination. We schedule the lift during a calm weather window and coordinate safe perimeter setups, spotters, and traffic control on site as needed.
  5. Removal and installation. We protect the roof membrane, detach the old unit, set the new RTU on the curb or adapter, connect ducts, gas, and electrical, and seal all penetrations with roof-safe materials.
  6. Start-up and balancing. We check gas pressure or heat strips, verify airflow, set controls, and confirm supply temperatures at key registers.
  7. Walkthrough and care plan. You get a simple run-through of filters, thermostat settings, and service intervals. We leave the roof clean and your system documented.

If you are ready to plan your project, call 970-344-5063. We will confirm a convenient time and provide a clear path from the first visit to a smooth lift.

Why Choose ASI For Your Rooftop HVAC

Choosing the right installer matters as much as selecting the right unit. A precise, weather-aware installation protects your roof, your energy bills, and your comfort. Here is how ASI supports you:

We handle crane day coordination and site safety, so your team can keep working. Our crew sets clear arrival windows, communicates with nearby tenants, and keeps the lift area controlled and tidy.

We are brand-flexible and recommend models that fit your building, not just our inventory. You will get honest guidance on repair versus replace, and if repair still makes sense, we will say so. Our installs are neat, our wiring is labeled, and our documentation is easy to follow for future service.

We also respect your roof. That means protective pads, careful staging, correct curb adapters, sealed penetrations, and final photos so you can see the work that was done. Your comfort and safety are always at the center of our plan.

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Built For Colorado Weather And Longmont Roofs

Longmont sits on the Front Range, where strong sun, afternoon winds, spring hail, and freeze-thaw cycles can test rooftop equipment. We tailor installs for these conditions. That includes securing cabinet panels, checking economizer seals, and confirming that hail guards and filters match local air quality and pollen seasons. In older areas near Old Town and Prospect, we often see unique roof edges and parapet walls. We adapt to these details, protect the membrane, and route condensate to safe discharge points. In light industrial zones along Ken Pratt Boulevard and the airport area, clear crane access and coordinated timing reduce downtime for your operations.

Because Longmont experiences wide temperature swings, we pay extra attention to airflow and controls. Staged or variable capacity helps reduce short cycling and keeps indoor humidity steadier when storms roll through. Correct airflow also prevents hot and cold spots that can frustrate staff and customers.

Smart Controls, Filtration, And Ventilation Options

Modern RTUs allow better control and cleaner air without complicated add-ons. We can pair your new unit with controls that match your space, from simple programmable thermostats to smart sensors that trim energy use when areas are empty. We also offer filtration options sized for your airflow so you can capture dust and pollen without overworking the fan. If your building benefits from fresh air during cool mornings, economizers can bring in outdoor air to cut run time and improve indoor quality.

What Affects Timeline And Cost

Project timing and investment vary by unit size, roof access, weather, and whether a curb adapter is needed. Most changeouts finish in a single day after planning, while larger multi-unit projects may take longer. Please note that exact pricing depends on your building's layout, equipment capacity, and season. We keep everything transparent and will walk you through options that fit your goals.

Clear communication from the first call to the final walkthrough means fewer surprises and a smoother project. You will always know who is arriving, what is happening next, and when your system will be running.

Have questions right now? Talk with our team at 970-344-5063. We will help you decide the best next step for your space.

Ready For A Quieter, More Efficient Rooftop Unit?

Let ASI handle everything from the first roof walk to the final thermostat check. We will guide you with clear choices, careful planning, and a clean install that protects your roof and your comfort. Call 970-344-5063 to schedule your on-roof assessment and get a detailed, easy-to-read proposal. For residential HVAC and kitchen remodeling in Longmont and nearby areas, reach out to our team today and get the service you deserve.

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Frequently Asked Rooftop Unit Installation & Replacement Questions

Question 1: How Long Does A Typical Replacement Take?

Question 2: Will I Need A Crane?

Question 3: What Size Unit Do I Need?

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What Our Customers Say About Us

  • I have been using this company for quite some time, and they are always there to help me out with my furnace and air conditioning. I even used them this spring for my remodel to my bathroom.

    JW
    John W.
  • Absolutely stellar service! I recently had a challenging plumbing issue that had been plaguing my home for months, and I cannot express enough gratitude for the exceptional work provided by the team at Almega Creative Builders. From start to finish, they exhibited the utmost professionalism, skill, and dedication to resolving the problem.

    PT
    Phillip T.
  • Great work, you got my air conditioning up and running. I really liked working with a family owned company. Thank you for the help!

    LK
    Linda K.
  • Great Company quick and reliable will call again

    RC
    RC Channel

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