Dunham Bush Falcon Series ACPSJ Rooftop Packaged Unit (High Efficiency & DOAS)

Cooling Capacity from 183 to 1596 MBH (54 to 468 kW)

Heating Capacity from 181 to 1654 MBH (53 to 485 kW)

The ACPCJ features:

• High Efficiency Scroll Compressors
• Rugged Design for Outdoor Applications
• Available with Variable Speed Compressors
• Direct Drive Fans
• 100% Outside Air DOAS and ERU
• ETL Certified
• Green Refrigerants

The Dunham Bush Falcon ACPSJ Series addresses two of the most critical demands in modern building engineering: reducing monthly utility power costs and maintaining exceptional indoor air purity. Unlike basic rooftop units that rely on traditional fixed-speed on/off compressor cycling and belt-driven fans, the ACPSJ series leverages modern variable-speed inverter technology and advanced air-distribution components to provide unparalleled thermodynamic control.

The baseline performance of this series is driven by high-efficiency hermetic scroll compressors, with the option to integrate advanced variable-speed inverter compressors. Rather than drawing a massive surge of starting current from the electrical grid, an inverter-equipped ACPSJ ramps its motor speed smoothly up and down to match real-time indoor thermal shifts. This eliminates wasteful temperature swings and delivers substantial energy savings, particularly during partial-load hours or changing weather shifts.

On the air-handling side, the ACPSJ replaces old-school belts and pulleys with premium direct-drive fans (often featuring plenum/plug configurations). Because there are no fan belts to stretch, wear down, or snap, mechanical transmission losses drop to absolute zero, and regular maintenance requirements are significantly minimized. Furthermore, the ACPSJ stands out with its engineered 100% Outside Air capability, allowing it to configure as a Dedicated Outdoor Air System (DOAS) or an Energy Recovery Unit (ERU). This system extracts stagnant indoor air, captures its thermal energy, and delivers a continuous stream of filtered, conditioned fresh outdoor air to keep indoor spaces safe and healthy.

Key Technical Highlight Matrix

Core Functions of the Dunham Bush Falcon ACPSJ Series

• Continuous Inverter-Driven Load Matching: Modulates internal compressor speeds instantly to keep supply-air duct temperatures perfectly stable, preventing sudden spikes on factory power meters.

• 100% Fresh Outside Air Treatment (DOAS): Functions as an advanced Dedicated Outdoor Air System, conditioning high-humidity outside air down to comfortable indoor levels before distributing it throughout the building.

• Direct-Drive Clean Fan Operation: Utilizes a direct motor-to-impeller connection. This eliminates belt dust and friction wear, keeping air loops entirely free of fine rubber particles.

• Integrated Multi-Circuit Redundancy: Divides high-tonnage models into multiple independent refrigeration circuits. If one circuit undergoes routine maintenance, the remaining scroll lines continue running seamlessly.

Strategic Importance Across Bangladesh

1. Government Institutes, Public Health & Specialized Laboratories

Public assets—such as specialized government medical labs, national archive repositories, defense IT data hubs, and pharmaceutical regulatory facilities—require precise humidity management and high ventilation rates to keep operations safe.

• Advanced Clean Air Exchange: The 100% outside air option helps public hospital wings flush out airborne pathogens by constantly introducing clean, filtered fresh air instead of recirculating old indoor air.

• Protects Power Infrastructure: Variable-speed soft-starting prevents sudden current drops on local electrical transformers, protecting sensitive laboratory computers and testing equipment.

2. Private Sector Garments (RMG), Cleanrooms & Premium Corporate Offices

For Bangladesh’s high-tier Ready-Made Garment (RMG) compliance factories, private pharmaceutical manufacturing zones, and multi-story corporate headquarters, energy efficiency and air quality directly affect profitability.

• Meets Strict Global Sustainability Audits: Exporting to international buyers requires complying with strict green building frameworks. The high part-load efficiencies and eco-friendly refrigerants of the ACPSJ help facilities achieve high LEED ratings.

• Zero Belt-Dust for High-Specification Cleanrooms: Traditional air handlers shed fine rubber dust as their drive belts wear down, which can compromise cleanroom filters. The direct-drive plenum fans in the ACPSJ eliminate this risk entirely, protecting sensitive packaging loops.

Why Buy From Bhai Bhai Engineering?

Procuring a high-spec central rooftop packaged system requires a dedicated engineering team. Bhai Bhai Engineering delivers end-to-end industrial support across Bangladesh:

• Verified Authentic OEM Equipment: We deal directly with official Dunham Bush factory tracks, delivering 100% genuine, brand-new equipment complete with verified serial numbers and original factory warranties.

• Turnkey Air Balancing & Automation Control: Our technical team designs and installs complete custom duct structures, installs automated dampers, and integrates the system with your building's existing central management systems (BMS).

• Transparent Financial Proposals: Avoid unexpected logistics fees or import surcharges. We provide clear, comprehensive upfront pricing proposals in Bangladeshi Taka (BDT) structured for corporate procurement reviews or public tender frameworks.

• Long-Term Preventive Spare Parts Support: We maintain local stocks of original variable-frequency drives (VFDs), scroll modules, expansion sensors, and premium filtration elements to prevent costly operational downtime.

Contact Us for a Quotation

Equip your commercial facility with elite, direct-drive rooftop cooling and advanced fresh air technology. Contact our specialized project sales engineering desk in Dhaka today to get a detailed commercial proposal and technical product data sheets based on your layout configurations.

• Corporate Headquarters: Podirdia, Khilbarirtek, Vatera, Dhaka-1212. (Nur-E-Madina Mosjid Complex)

• Sales & Project WhatsApp: +8801722039029

• Corporate Mailbox: bhaibhaiengineering51@gmail.com

• Engineering Platform: https://www.bhaibhaiengineering.com/

Frequently Asked Questions (FAQs)

Q1: What makes the ACPSJ "Falcon" series different from the standard ACPSB series?

Ans: The ACPSJ series is an upgraded, high-efficiency system featuring modern direct-drive fans and option-ready variable-speed inverter compressors. It also includes full structural support for 100% fresh outside air configurations (DOAS/ERU), whereas standard models are typically optimized for standard indoor air recirculation.

Q2: What are the main benefits of direct-drive fans over traditional belt-driven fans?

Ans: Direct-drive fans connect the motor directly to the fan impeller. This removes belts, pulleys, and bearings that wear down over time, eliminating transmission energy losses, reducing regular maintenance work, and preventing belt dust from entering the air stream.

Q3: Can the ACPSJ rooftop unit control indoor relative humidity (RH) effectively?

Ans: Yes. When configured as a Dedicated Outdoor Air System (DOAS), the ACPSJ is engineered specifically to capture fresh outside air, remove heavy tropical humidity through targeted cooling coils, and supply properly dehumidified fresh air into your building.

Q4: How does a variable-speed compressor save on monthly factory power bills?

Ans: Standard compressors run at a single fixed speed, turning completely on or off to adjust temperatures, which causes frequent power spikes. An inverter or variable-speed compressor runs continuously at lower, optimized speeds to match real-time building cooling loads, reducing overall energy consumption.