- 2025 Riverdale St, West Springfield, MA 01089
- Mon-Fri 7am-3pm
- Serving Western Mass
Offices, retail buildings, multi-residential properties, and municipal facilities depend on RTUs for year-round climate control. Biermann installs, replaces, and maintains commercial rooftop units across Western Massachusetts, plus Enfield and Suffield, Connecticut. One point of contact for equipment selection, installation, and ongoing service.
Tell us what's wrong. We'll call you back, usually within the hour.
Free consultations. $65 for formal project estimates.
Years in Business
Google Rating
Licensed & Insured
Labor Warranty
Rooftop units are the workhorses of commercial HVAC. A single RTU on a retail store or office building handles heating, cooling, and ventilation for the entire floor it serves. When one fails mid-July or mid-January, you do not just have a discomfort problem: you have a tenant complaint, a lost business day, and a capital decision to make under pressure.
Biermann handles commercial RTU work the same way we handle everything else: with a service-first mindset, code-compliant installation, and a single point of contact from load review through close-out documentation. We assess your existing equipment honestly, recommend the right path (repair, tune-up, or capital replacement), and coordinate the full scope including ductwork modifications through our trusted sheetmetal partners.
Facility managers and property owners across Western Massachusetts and parts of northern Connecticut (Enfield and Suffield) trust us for both day-to-day service and planned capital upgrades. Every installation comes with a 1-year labor warranty. Ongoing maintenance plans protect that investment.
Every Install
Four areas of RTU work, all coordinated through one licensed contractor. Ductwork and sheetmetal fabrication is handled through our specialty partners.
The most common commercial configuration is the packaged rooftop unit: all heating, cooling, and air-handling components in a single self-contained cabinet sitting on the roof curb, connected to interior ductwork below. Packaged RTUs range from 3 tons for small offices up through 20-plus tons for larger retail and municipal spaces. Gas-electric units are the standard for most commercial buildings in Western Massachusetts; heat pump versions are available for properties aiming for all-electric operation.
Some properties use a split-system configuration: the condenser sits on the roof, and a separate air handler is located inside the mechanical room or ceiling plenum. We work with both configurations and assess which setup best fits your building’s existing mechanical layout before recommending a replacement path. Equipment sizing is based on a proper commercial load review, not a rule of thumb.
Installing a commercial rooftop unit is a logistics project as much as a mechanical one. We handle the scope from start to finish: load review and equipment selection, permit procurement, crane rigging coordination for larger units, gas piping for heating sections, electrical connections and controls wiring, and final start-up and testing. For municipal and prevailing wage projects, we manage certified payroll, submittals, and close-out documentation.
Ground-up commercial construction, tenant fit-outs, core/shell buildings, and capital replacement of end-of-life equipment on existing properties all fall within our scope. We schedule high-impact work (crane days, system shutdowns) around your building’s operating hours and tenant needs wherever possible.
Most commercial RTUs benefit from two scheduled maintenance visits per year: a spring start-up before cooling season and a fall tune-up before heating season. Each visit covers coil cleaning on both the condenser and evaporator sides, filter replacement, refrigerant check, electrical connection inspection, heat section testing, belt and bearing inspection on older units, controls verification, and a full start-up run under load.
Dirty coils alone can cost 10 to 15 percent of a unit’s efficiency. Filters that go too long between changes restrict airflow and force the unit to work harder than it was designed to. A written maintenance plan with two annual visits prevents the small failures from becoming mid-season emergencies. We can expand to quarterly visits for high-demand properties or buildings with aging equipment.
Biermann does not fabricate or install sheetmetal ductwork in-house. Commercial ductwork fabrication is a specialty trade that requires a shop floor, fabricators, and equipment we do not have. We do not pretend otherwise. What we do is partner with vetted local fabrication shops for every project that needs duct modifications, new trunk runs, or diffuser changes.
For you, the practical result is the same: one proposal, one schedule, one point of contact throughout the project. We manage the coordination between the mechanical install and the ductwork partner directly. You are not left bridging two separate contractors who have never spoken. That is one of the main reasons facility managers and property owners in Western Mass keep coming back.
Municipal-capable, licensed in MA and CT, and experienced working in occupied commercial spaces since 1983.
Keeping your home or property running safely is our core business. We build long-term relationships, not one-off transactions.
Two trades, one dedicated crew. From an emergency call at your house to a ground-up commercial build, you never juggle multiple contractors.
Four decades of working in active homes, apartment complexes, dental offices, and banks. Clean worksites, low noise, and respect for your space.
Prevailing wage, certified payrolls, public bidding, and strict documentation. Most small shops won't touch public projects. We welcome them.
Many smaller mechanical contractors avoid public bidding and prevailing wage work because of the documentation requirements. Biermann does not. We regularly work for local municipalities on schools, public safety buildings, public works facilities, and treatment plants throughout Western Massachusetts.
For public projects, we handle the full compliance package: certified payrolls, public bid submissions, submittal documentation during construction, and close-out packages at project end. Town facility directors and public procurement officers get a contractor that knows the process and does not need to be walked through it.
RTU replacement on a school or town hall is a capital project with a procurement process. We understand that timeline, price our work accordingly, and deliver the documentation that keeps a public project on track.
Western Mass contractor since 1983, owner-involved operation
MA #16160 & #8250, CT #PLM.0288365-P1, fully insured
Certified payrolls, submittals, and close-out documentation
Labor warranty on every commercial RTU installation
For capital replacements and new installations. We manage the scope, coordinate the ductwork partner, handle permitting and rigging, and deliver close-out docs.
We evaluate your existing equipment, assess current heating and cooling loads, and discuss any changes in building use that affect sizing. For capital projects, the initial consultation is free. Formal written estimates for large installations are $65.
Based on the load review, we recommend equipment sized for your actual building. We walk through efficiency options, explain the payback math, and handle design-assist documentation for GCs and municipal projects. No guesswork on tonnage.
We pull the necessary permits and coordinate crane rigging for larger units. High-impact work is scheduled around your occupied spaces and operating hours. All safety protocols for pedestrians and building occupants are followed.
Our licensed crew handles RTU installation, gas piping, electrical connections, and control wiring. Sheetmetal and ductwork connections are managed through our trusted fabrication partners. You deal with one contractor throughout.
We conduct a full system start-up and verify airflow, thermostat operation, and code compliance before we leave. Close-out documentation includes submittals and your 1-year labor warranty. Municipal projects get the full certified close-out package
A rooftop unit (RTU) is a packaged commercial HVAC system installed directly on a building’s roof. It contains the heating, cooling, and air-handling components in a single cabinet, connected to the building interior through ductwork. RTUs are standard equipment on retail stores, office buildings, banks, strip malls, municipal facilities, and multi-tenant commercial buildings. They are not typically used in single-family homes. If your commercial or multi-residential property already has RTUs, Biermann can service and replace them.
Most commercial RTUs have a useful life of 15 to 20 years with good maintenance. Signs it is time to consider replacement: the unit is 15-plus years old and requiring frequent repairs, energy costs are climbing year over year, the system struggles to hold setpoint during peak summer or winter days, refrigerant is R-22 (no longer manufactured, increasingly expensive to source), or repair estimates are approaching 50 percent of replacement cost. We assess your existing equipment and give you an honest comparison of repair costs versus a capital replacement.
For most commercial properties, the standard maintenance schedule is two visits per year: a spring start-up before cooling season and a fall tune-up before heating season. Each visit covers refrigerant level check, coil cleaning (both condenser and evaporator), filter replacement, electrical connections and controls inspection, heat section testing, belt and bearing inspection on older units, and a start-up test under load. Higher-demand properties, occupied medical facilities, and buildings with older equipment may benefit from quarterly visits. We set up a written maintenance plan so nothing falls through the cracks.
24/7 emergency service is available for existing customers only. If your RTU fails during a heat wave or a cold snap and Biermann already services your property, call (413) 547-2970 and we will respond. New customers are welcome during normal business hours, Monday through Friday, 7am to 3pm, and we will prioritize getting you on the schedule.
Yes. Short of replacing the unit entirely, several targeted upgrades improve efficiency. Economizer damper repair or replacement reduces mechanical cooling hours by bringing in outside air when conditions allow. Smart thermostat and building controls upgrades let you schedule setbacks and monitor runtime remotely. Coil cleaning alone can restore 10 to 15 percent of lost efficiency on a dirty unit. Filter upgrades to higher MERV ratings improve both air quality and airflow balance. If the unit is beyond a reasonable repair horizon, we will tell you that too, so you are not putting money into equipment that is already past its useful life.
We install packaged rooftop units for commercial and multi-residential applications ranging from light commercial (3 to 5 tons) up through large-building units of 20 tons or more. Standard packaged RTUs combine heating and cooling in one cabinet and connect to existing ductwork. We also work with split-system setups where the condenser sits on the roof and the air handler is located inside the mechanical room. Equipment selection is based on a proper load review for your building, not guesswork off square footage. We coordinate crane rigging for larger units and manage ductwork modifications through our sheetmetal partners.
Seasonal tune-ups and structured maintenance for commercial properties.
Residential and light commercial A/C, heat pumps, and mini-splits.
All residential and commercial HVAC from Biermann.
Smart controls and building automation for commercial properties.
Google Rating
Years in Business
Labor Warranty
Had a great experience calling Biermann as a first time customer dealing with an ill-timed heating issue in below-zero temperatures. Bill was thorough, quick, respectful and helpful in explaining possible issues. Highly recommend.
“Exceptional service. Smooth and flawless. Technician Kyle was The Best. Thank you!”
“Responsive, prompt, excellent work.”
Free on-site consultation for commercial RTU projects. We assess your existing equipment, run the load review, and give you an honest recommendation. Call (413) 547-2970 or fill out the form.
Tell us what’s going on. We call back fast, usually within the hour.
