Commercial Packaged Equipment

Specification: 3 to 150+ Ton Rooftop Units

Rooftop packaged units (RTUs), multi-zone VAV systems, and commercial tenant comfort systems.

Engineering Scope & Overview

Commercial packaged units handle the daily thermal comfort of offices, retail, and institutional facilities. Regular compressor staging checks, economizer damper testing, and coil maintenance extend equipment lifespan and keep occupants comfortable.

WMI Field Protocol & Certified Best Practices

• Dual-enthalpy economizer calibration for maximum free-cooling hours
• Scroll and reciprocating compressor staging inspection
• Blower belt alignment and static pressure balancing
• Condensate drain pan biocide treatment preventing microbiological overflow

Frequently Asked Questions

Why do commercial rooftop packaged unit economizers frequently fail?

Outdoor actuators and enthalpy sensors are exposed to extreme sun and dust. When they seize, the dampers often remain stuck open, drawing 100°F summer air directly into the building.

What sizes of commercial rooftop equipment does Western Mechanical service?

We service everything from 3-ton light commercial split systems to heavy 150-ton multi-zone rooftop VAV packaged units with variable-speed supply fans.

Can you handle emergency weekend crane crane-lifts for rooftop replacements?

Yes. We manage turnkey crane rigging, city street closure permits, and curb adaptor transitions for seamless weekend equipment changeouts.

Emergency Dispatch & RFP Inquiry

Contact Western Mechanical Inc. toll-free at (800) 585-5085 for commercial and industrial service across Southern California.