Precision Air Conditioning (CRAC/CRAH)
Specialized cooling systems maintaining exact temperature and humidity for sensitive electronic equipment. Mr. Aircon is an authorized AR precision aircon dealer.
Capacity
5 – 200+ kW
BTU Range
17,000 – 680,000+ BTU/hr
Efficiency
SHR 0.85 – 0.95 (sensible heat ratio)
Refrigerant
R-410A, R-407C, R-134a
Price Range
₱300,000 – ₱5,000,000+ (per unit)
What Is Precision Air Conditioning?
Precision air conditioning — also called Computer Room Air Conditioning (CRAC) or Computer Room Air Handler (CRAH) — is purpose-built cooling technology designed for environments where standard comfort aircon is inadequate. Unlike residential split-type units that maintain temperature within ±2-3°C, precision systems hold temperature within ±0.5°C and humidity within ±2% relative humidity simultaneously. This level of control is essential for data centers, server rooms, telecom switching facilities, and medical imaging rooms where electronic equipment generates concentrated heat loads of 2,000-10,000+ watts per rack. Precision units are engineered for 24/7/365 continuous operation with redundant components and hot-swappable parts, whereas standard aircon is designed for 8-12 hours of daily residential use. The key technical differentiator is the sensible heat ratio (SHR): precision units achieve 0.85-0.95, directing nearly all cooling capacity toward temperature reduction rather than moisture removal.
AR Precision Aircon — Mr. Aircon's Solution
Mr. Aircon Philippines is an authorized dealer of AR precision air conditioning units, a South Korean brand specializing in mission-critical cooling for the Philippine market. AR precision units are engineered for tropical conditions where outdoor ambient temperatures regularly exceed 35°C, which reduces condenser efficiency in competing brands not designed for Southeast Asian climates. The AR product range covers server rooms from single-rack closets to enterprise data centers: the AR-PAC series handles 5-20 kW loads for small server rooms and telecom cabinets, the AR-PDC series handles 20-100 kW for medium data centers, and custom configurations serve enterprise-scale facilities. Key features include variable-speed EC fans for energy efficiency, hot-swappable components for maintenance without downtime, SNMP network monitoring for remote management, and N+1 redundancy options for mission-critical uptime requirements.
Why Standard Aircon Fails in Server Rooms
Philippine businesses frequently make the costly mistake of using standard split-type or cassette aircon to cool server rooms. Standard comfort aircon has a sensible heat ratio of 0.60-0.70, meaning 30-40% of its cooling capacity is wasted removing moisture from air rather than lowering temperature. Server equipment generates almost entirely sensible heat (dry heat from electronics) with minimal moisture. Precision units achieve SHR of 0.85-0.95, directing nearly all capacity toward temperature reduction. Additionally, standard units cycle on and off based on room temperature, creating temperature swings that cause thermal stress on server components, condensation risk on circuit boards, and hard drive failures from thermal expansion. Precision units run continuously, modulating output to maintain constant conditions. The upfront cost of precision cooling is 2-3 times higher than comfort cooling, but prevents equipment damage that can cost 10-100 times more in downtime and replacement.
Sizing Precision Aircon for Philippine Conditions
Sizing precision aircon for Philippine data centers must account for high outdoor ambient temperatures that reduce condenser efficiency. At 35°C outdoor temperature (common during Philippine summer), air-cooled precision units lose approximately 10-15% of their rated capacity compared to the standard rating condition. For a server room with 50 kW of IT heat load, plan for 60-65 kW of installed precision cooling capacity to account for derating and provide operational margin. The general formula is: Required Cooling = IT Load × 1.3 safety factor. For facilities requiring 99.99% uptime, implement N+1 redundancy — for every N units needed to handle the full load, install one additional backup unit that activates automatically if any primary unit fails. Mr. Aircon provides comprehensive data center cooling assessments including thermal mapping, airflow analysis, and redundancy planning for facilities across Metro Manila and Cebu.
Hot Aisle / Cold Aisle Containment
For Philippine data centers with 10+ server racks, implementing hot aisle/cold aisle containment dramatically improves precision aircon efficiency and reduces energy consumption by 20-40%. The concept arranges server racks in alternating rows so all rack fronts (cold air intakes) face one aisle and all rack backs (hot air exhausts) face the adjacent aisle. Precision units deliver cold air to the cold aisle through raised floor tiles or overhead ducts, and hot air returns from the hot aisle. Physical barriers — curtains, rigid acrylic panels, or sliding doors — prevent hot and cold air from mixing. Without containment, hot exhaust air recirculates back to server intakes, forcing precision units to work harder and potentially causing equipment overheating. Mr. Aircon’s data center team designs and implements containment solutions using both rigid panels and flexible strip curtains based on facility layout and budget.
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