Service
Commercial HVAC Installation & Replacement in the Sierra Foothills
Are aging commercial units driving up energy costs and disrupting tenants? We engineer and install dependable systems built to protect your facility.
When does a commercial building need HVAC replacement instead of more repairs?
A commercial building needs HVAC replacement when repeated compressor failures, spiking energy bills, or phased-out refrigerants make spot repairs a losing battle. Foothill Air Systems provides engineered commercial HVAC installation and replacement across the Sierra Foothills.
What are the warning signs a commercial HVAC unit needs replacing?
The main warning signs are compressors that trip main breakers on startup and persistent hot and cold spots across suites, sales floors, or production bays that aging fixed-speed equipment can no longer handle.
Chronic Compressor Failures and Severe Electrical Over-Amping
When rooftop packaged units or split compressors continuously trip main commercial breakers upon ignition, the internal motor windings have degraded past their design tolerances. Continued operation risks a catastrophic acidic motor burnout that contaminates line sets and permanently damages connected equipment.
Severe Thermal Imbalance and Tenant Comfort Complaints
Persistent hot and cold spots across separate office suites, retail sales floors, or production bays indicate that your current mechanical systems can no longer handle structural heat loads. Aging, fixed-speed equipment simply cannot match changing commercial occupancy dynamics or modern static pressure demands across expansive ductwork.
Leaking Coils on Phased-Out Refrigerant Platforms
If your existing equipment relies on discontinued refrigerants like R-22, ongoing pinhole coil leaks create exorbitant recharging expenses without solving the underlying degradation. Operating on chronically low pressures overheats mechanical bearings and accelerates total system lockup during critical operating hours.
Escalating Condensate Drainage Failures and Humidity Build-Up
Commercial units that fail to manage latent moisture loads leave interior spaces feeling humid, musty, and vulnerable to mold accumulation along drop-ceiling tiles. Rusted drain pans and poorly engineered traps exacerbate water intrusions that threaten expensive interior inventory, drywall, and structural framing.
Why do commercial HVAC systems reach the end of their life?
Commercial HVAC systems wear out from thousands of yearly operating hours that fracture heat exchangers and seize compressors, or become mis-sized after remodels change the interior heat load.
End-of-Life Mechanical Fatigue and Heat Exchanger Degradation
Commercial HVAC systems run under punishing schedules, logging thousands of operating hours each year that eventually cause metal fatigue and thermal cracking. Once primary heat exchangers fracture or heavy-duty scroll compressors suffer mechanical seizure, total equipment replacement becomes the only safe and code-compliant path forward.
Incompatible System Tonnage Following Interior Space Modifications
Remodeling commercial interiors by partitioning open floors, adding heat-generating server racks, or expanding occupancy creates significant changes to sensible heat loads. Legacy systems sized for previous interior footprints end up severely undersized or continuously short-cycling, accelerating mechanical component failure.
Regional Environmental Debris and Airborne Particulate Stress
Properties throughout the Sierra Foothills face severe outdoor coil fouling from granite road dust, thick ponderosa pine needles, and recurring wildfire ash accumulations. These dense contaminants block exterior airflow, driving head pressures dangerously high and burning out fan motors well ahead of their expected lifespans.
What happens during a commercial HVAC assessment and installation visit?
During a commercial assessment, Foothill Air Systems audits mechanical rooms, roof curbs, and air delivery, verifying electrical capacity, duct static pressure, supply-and-return transitions, and gas piping so replacement equipment integrates safely into the building.
Our commercial assessment includes comprehensive load calculations to select the exact tonnage and equipment staging required for your square footage and heat gain factors. We review packaged rooftop heat pumps, commercial split layouts, and variable-capacity options while discussing crane access, curb adapter specifications, and realistic project timelines.
On the day of the replacement, we manage the removal of your obsolete equipment, recovering refrigerant into approved recovery cylinders following EPA rules, to keep operational disruption to a minimum. We install the new system according to strict structural and mechanical codes, complete precision charging, program commercial controls, and fully commission the equipment to deliver balanced, dependable airflow.
Where does Foothill Air Systems install commercial HVAC equipment?
Foothill Air Systems provides commercial equipment sizing, crane-lift retrofits, and complete system replacements for properties in these Nevada County, Placer County, and Truckee-Tahoe communities.
Nevada County Foothills: Grass Valley, CA, Nevada City, CA, Penn Valley, CA, Rough and Ready, CA, Alta Sierra, CA, Lake of the Pines, CA
Placer County Foothills: Auburn, CA, Colfax, CA, Rocklin, CA
Truckee-Tahoe Basin: Truckee, CA, Tahoe City, CA, Kings Beach, CA
What commercial HVAC services go with a new installation?
Targeted Commercial HVAC Repair can manage localized issues on functional sub-assemblies, and an ongoing Commercial HVAC Maintenance schedule protects newly installed equipment and maintains peak electrical efficiency.
How do you plan a commercial HVAC upgrade?
Plan a commercial HVAC upgrade by calling Foothill Air Systems at (530) 212-0057 for a detailed site evaluation. Deteriorating equipment brings lost productivity, frustrated tenants, and uncontrolled emergency repair expenses.
Reach out to Foothill Air Systems at (530) 212-0057 or through our online contact page to schedule a detailed site evaluation and equipment replacement plan.
Signs you need this
- Tenant or staff comfort complaints are recurring
- A rooftop unit has needed repeated service calls
- Energy costs are out of line with square footage and occupancy
- You need a maintenance agreement for a lease or insurance requirement
- Equipment is aging and you need a defensible replacement budget
- A space is being repurposed and the existing system does not match the new use
Cost and estimates
What sets the price
- Equipment size. We size it with a load calculation, not by matching the old unit.
- Duct condition. If your ducts cannot carry the airflow, they may need work first.
- Access. A tight crawlspace, attic or long line-set run takes more time.
- Elevation. Colder winters up the hill can call for a cold-climate heat pump or a dual-fuel system.
We test before we quote. You get written findings with the repair and replace numbers before any work begins.
Replacement and installation work can be paid over time through Optimus Financing. See financing options
Common questions
Do you offer commercial maintenance agreements?
Yes. Commercial agreements are scoped to the building and the equipment rather than sold as a fixed package — the number of units, their age and type, filtration requirements, run hours and your uptime tolerance all change the right visit frequency and task list. We will walk the property, inventory the equipment, and propose a schedule with documented tasks and reporting.
Can you work outside business hours?
For most commercial work, yes, and often that is the right call. Changeouts, crane lifts and anything noisy or disruptive are usually best scheduled before opening, after close, or on a weekend. We plan the schedule with you rather than around you.
Do you handle refrigerant compliance and documentation?
Yes. We handle leak repair, charge documentation and the record-keeping that goes with commercial refrigerant management, and we will flag equipment on a phased-out refrigerant so it can be planned for rather than discovered during a failure.
Request service
Commercial HVAC Installation & Replacement
Tell us what the system is doing and where you are. We will follow up to confirm scheduling.
- Grass Valley, CA & Truckee/Tahoe
- Mon–Fri: 8AM–5PM
Sat: By Appointment
Send us the details
A technician reviews every request. No call centre.