PSI Refrigeration Inc.

Total Kitchen Infrastructure Support & Mechanical Services

Precision Mechanical Overhauls & Component Swaps

Certified technician performing an emergency mechanical repair and drive belt replacement

A snapped drive belt or a seized blower motor can instantly halt your business operations. Our technicians are experts at diagnosing internal mechanical failures on critical restaurant equipment—from walk-in box evaporators to heavy-duty rooftop ventilation blowers. We carry a robust inventory of OEM-spec pulleys, fractional horsepower motors, and industrial-grade belts to execute rapid on-site replacements, ensuring your facility's air balance and cooling systems are restored to factory standards without delay.

Rooftop Diagnostic Care & Fleet-Assisted Field Services

PSI Refrigeration Inc. commercial truck delivering heavy-duty exhaust fan for install project.

Protecting your commercial assets requires specialized equipment and proactive oversight. Utilizing our dedicated service fleet and advanced rigging capabilities, we perform deep-dive technical inspections and performance tuning during off-peak hours to keep your business running smoothly. Our custom facility care programs focus on checking bearing assemblies, monitoring electrical amp draws, and optimizing both refrigeration and air-handling equipment to slash utility costs, eliminate safety liabilities, and extend equipment lifespans.

All-in-One Commercial Air, Ventilation & Thermal Management

Integrated Type I & Type II Cooking Hood Implementations

Custom stainless steel Type I grease hood installation over a commercial restaurant cooking line

High-volume indoor cooking requires precision airflow to keep smoke out of the dining area and heat off the line. We specialize in configuring full-scale stainless steel Type I grease hoods for heavy cooking lines and Type II vapor hoods for dishwashing and baking areas. By integrating these systems seamlessly with your building’s makeup air units (MAU) and commercial HVAC infrastructure, we eliminate negative building pressure, draft issues, and unwanted kitchen odors.

Rooftop Ventilation, Upblast Fans & Climate Control Diagnostics

Dual commercial upblast exhaust fans serviced and balanced to maintain correct building pressure

Your roof contains the hardest-working components of your facility's climate and exhaust systems. Our technicians deliver rapid troubleshooting and emergency diagnostics for heavy-duty rooftop upblast fans, commercial air conditioning units, and industrial swamp coolers. Whether your facility is struggling with poor smoke extraction, inadequate cooling, or imbalanced makeup air, we possess the specialized rigging and tools to resolve commercial ventilation and HVAC failures quickly to keep your doors open.

Unified Maintenance for Refrigeration, Ventilation & HVAC Assets

Commercial kitchen ventilation experts in LA & Orange County. We install, repair & service

Neglecting mechanical components leads to skyrocketing utility bills and premature compressor or fan motor failures. Our proactive preventative maintenance programs cover your entire facility's mechanical footprint. We perform synchronized inspections—replacing worn fan belts, lubricating high-RPM bearings, cleaning hood filters, and checking commercial refrigeration charge levels. This holistic approach protects your equipment investment, satisfies strict health department regulations, and optimizes your facility’s energy efficiency.

Multi-Agency Compliance & Commercial Code Alignment

Unified Maintenance for Refrigeration, Ventilation & HVAC Assets

performing a mechanical repair and rebuild on a commercial exhaust ventilation blower assembly

Navigating the strict regulatory web of local health departments, building authorities, and city inspectors requires specialized expertise. We design and service all commercial exhaust systems to align precisely with current California codes and municipal ordinances. Our meticulous approach ensures your kitchen ventilation infrastructure easily passes structural, fire safety, and health department inspections, preventing costly project delays, administrative fines, or forced operational closures for your business.

Comprehensive Commercial Liability Insurance & Credentialing

replacing a worn fan drive belt upblast exhaust fan calibrating pulley alignment and belt tensioning

High-value commercial properties and national restaurant chains demand service providers with elite operational credentials. PSI Refrigeration Inc. carries comprehensive, high-limit commercial liability insurance, worker's compensation, and full bond protections to satisfy strict risk management vendor portals (like ServiceChannel). When you partner with us, your property owners, corporate boards, and investment groups receive ironclad protection, making our team fully qualified to handle major infrastructure projects on enterprise-level mechanical assets.

Specialized Rooftop Access & Complex Facility Logistics

Commercial restaurant rooftop repairs and maintenance. Keeping the roof clean at all times

Servicing exhaust systems in regional indoor malls, strip centers, and multi-story mixed-use developments presents unique logistical hurdles. We specialize in managing complex access challenges—including coordinating landlord roof permissions, executing off-hours service windows, and deploying advanced rigging equipment or crane services for tight spaces. Whether your kitchen equipment sits in an open-air retail center or deep within an enclosed shopping mall, our experienced fleet ensures safe, authorized, and non-disruptive rooftop execution.

Is Your Exhaust System Failing? 5 Warning Signs to Watch For

The "Heavy Door" Effect:

If your restaurant’s front doors are difficult to pull open or slam shut violently on their own, your building has a dangerous air pressure imbalance caused by a malfunctioning Makeup Air Unit (MAU).

Persistent Line Haze:

If smoke, grease vapors, or cooking odors are lingering in the air long after the rush is over, your rooftop upblast fan is likely experiencing a slipping drive belt or a failing motor.

Rattling or Squealing From the Roof:

High-pitched screeching or violent vibrating noises from your roof mean your fan bearings have lost lubrication or your blower wheel is completely unbalanced and about to seize.

AC Units Short-Cycling:

If your kitchen exhaust is pulling too hard without proper makeup air, it will actively suck conditioned air out of your dining room, forcing your building AC units to overwork and driving up your utility bills.

Rooftop Grease Pooling:

If you see grease accumulating on your roof membrane around the fan base, your containment system is either clogged, missing an absorbent filter, or completely overwhelmed.

Troubleshooting Commercial Kitchen Air & Exhaust Problems

What is the difference between a Type I and Type II kitchen hood?

Type I hoods are designed for grease-producing cooking appliances (like grills, fryers, and broilers) and require integrated fire suppression systems. Type II hoods are engineered solely to capture heat, vapor, steam, and odors from non-grease equipment like commercial dishwashers, ovens, and baking lines.

How often does a commercial kitchen exhaust system require maintenance?

Under NFPA 96 standards, high-volume cooking operations (like 24-hour restaurants or charbroiling lines) require monthly or quarterly mechanical inspections. Standard commercial kitchens typically require quarterly or semi-annual service to ensure belt integrity, motor performance, and proper airflow balancing.

Why is my restaurant door hard to pull open, and how does it relate to the exhaust hood?

Hard-to-open doors are a classic symptom of negative air pressure, which happens when your kitchen exhaust hood is pulling out more air than your building is bringing back in. When your air is imbalanced, it creates a vacuum effect inside the facility. We resolve this by servicing, repairing, or installing a properly calibrated Makeup Air Unit (MAU) to restore perfect atmospheric balance, making doors easy to operate and saving your HVAC system from extreme wear and tear.

What happens if a commercial exhaust fan drive belt snaps during business hours?

If a drive belt breaks, the rooftop fan stops spinning, causing your kitchen to rapidly fill with heat, smoke, and hazardous grease vapors. This creates an immediate safety violation and typically forces a kitchen shutdown. Because of this high risk, our preventative maintenance programs include proactive belt inspections and tension adjustments, and we stock a complete inventory of commercial-grade replacement belts to get your ventilation system back online instantly during an emergency.

What causes a commercial rooftop exhaust fan to make a loud rattling or screeching noise?

Loud mechanical noises coming from your roof are an immediate warning sign that your exhaust fan is about to fail completely. A high-pitched screeching typically means the fan bearings have lost lubrication or are completely worn out, while a violent rattling or vibrating usually indicates a loose pulley, a fraying drive belt, or an unbalanced fan blower wheel. Ignoring these sounds can lead to a snapped belt or a seized motor, shutting down your entire cooking operation mid-shift. We provide rapid emergency bearing, belt, and motor replacements to quiet your system and prevent catastrophic kitchen downtime.

How does a commercial kitchen exhaust system affect my walk-in coolers and building AC?

Your ventilation and commercial refrigeration systems are completely interconnected. If your exhaust hoods are pulling out too much air (or if your makeup air unit isn't working), your building's air conditioning has to work twice as hard to keep up with the heat. This negative pressure can also pull hot, humid kitchen air straight across the gaskets of your walk-in coolers and freezers, causing rapid ice buildup on evaporator coils and premature compressor failure. Proper air balancing protects all of your critical kitchen refrigeration assets.

Why is my restaurant kitchen suddenly filling with smoke even though the exhaust hood is turned on?

your hood is running but smoke, heat, and grease vapors are still lingering over your cooking line, your ventilation system is experiencing an airflow restriction. This is usually caused by a slipping or stretched rooftop fan drive belt, heavily saturated grease baffle filters blocking the intake, a failing exhaust fan motor, or a major blockage in your ductwork. Our technicians quickly trace the root cause, swap out worn mechanical components, and restore the precise cubic feet per minute (CFM) extraction your kitchen needs to keep the air completely clear.