Rooftop & Make-Up Air Units
Commercial Rooftop Unit (RTU) & Make-Up Air (MAU) Services
Packaged rooftop units and dedicated make-up air systems serve as the core of commercial air distribution and building pressurization. Nexklima Inc. manages the full operational lifecycle of rooftop packaged systems—from routine filter and belt care to complex crane swaps and gas burner calibrations.
We keep your indoor spaces properly ventilated, comfortable, and pressure-balanced year-round.
Rooftop & Ventilation Services
1. Turnkey RTU Replacement & Crane Operations
Complete project management for packaged heating and cooling equipment swaps.
- Structural roof load verification, custom curb adapter fitting, and rigging logistics
- High-tonnage RTU replacements with minimal disruption to business operations
- Gas piping, high-voltage electrical connections, and duct transition drops
2. Make-Up Air (MAU) Tuning & Servicing
Replacing exhausted indoor air with fresh, conditioned outdoor air to maintain positive building pressure.
- Direct-fired and indirect-fired MAU burner profile adjustments
- Airflow balancing, belt tensioning, and blower motor alignment
- Heat exchanger crack inspections and carbon monoxide safety checks
3. Free-Cooling Economizers & Air Quality
Taking advantage of ambient outdoor temperatures to cool your building without running energy-intensive compressors.
- Dry-bulb and enthalpy-based economizer sensor calibration
- Modulating outdoor air damper actuator repair and seal replacement
- High-capacity MERV 13+ filter rack retrofits for improved indoor air quality
Signs Your Rooftop Unit Needs Service or Replacement
- Short-Cycling: Unit turns on and off rapidly without reaching target room temperature.
- Building Pressure Issues: Doors slamming shut or hard to push open due to negative pressurization.
- Frequent Belt / Bearing Failure: High-pitched squealing noises from fan housing indicating pulley misalignment.
- Rising Energy Bills: Compressors running continuously due to dirty coils or low refrigerant charge.
Frequently Asked Questions
What is the difference between an RTU and an MAU?
An RTU (Rooftop Unit) recirculates and conditions indoor air for space cooling and heating. An MAU (Make-Up Air Unit) brings in 100% fresh outdoor air to replace air lost through kitchen hoods, bathroom fans, or industrial exhaust.