Published on 2026-09-17 · Suzhou Industrial Park Gulin Commerce Co., Ltd.
Choosing central air conditioning for offices, malls, hotels and restaurants is a decision that balances many factors. Choose right and you get comfort, efficiency and durability; choose wrong and cooling is weak, bills are high and repairs are frequent. This guide explains commercial central AC selection across five dimensions: system type, capacity by area, usage scenario, efficiency and noise, and brand.
1. Main Types of Commercial Central AC
Today's commercial central AC mainly comes in three types, each with its pros, cons and suitable venues:
- VRF (VRV) systems: one outdoor unit drives multiple indoor units, each independently controlled for temperature and on/off. Pros: flexible control, strong part-load efficiency, easy installation, small footprint and high comfort. Cons: higher initial cost, and many outdoor units need suitable placement. Best for office buildings, hotel rooms, small malls and chain stores that need independent control.
- Ducted systems: one outdoor unit pairs with one ducted indoor unit, delivering air through ducts to each room. Pros: lower initial cost, even air distribution, fresh-air intake possible, concealed and neat installation. Cons: no per-room control (one temperature per system), relatively higher energy use, ducts take ceiling space. Best for restaurants, cafes, small offices and stores without precise per-room temperature needs.
- Water-system central AC: a chiller produces chilled water that is pumped to fan-coil units in each room. Pros: high comfort (gentle supply air, dryness-free), relatively lower initial cost, simultaneous heating and cooling with heat-pump models, ideal for large areas. Cons: complex system, long installation cycle, higher maintenance needs, leakage risk, dedicated machine room. Best for large malls, supermarkets, hotels, hospitals and office buildings.
2. How to Calculate Area and Capacity
Cooling capacity selection is critical: too small and cooling is weak, too large and money is wasted. Rough estimates by venue:
- Standard offices: 150-180 W/m2 (moderate occupancy, low heat gains).
- Malls and supermarkets: 200-250 W/m2 (high occupancy, lots of lighting, heat-emitting cases).
- Restaurants and banquet halls: 250-300 W/m2 (high occupancy, kitchen heat, body heat at meals).
- Machine and server rooms: 300 W/m2 and above (heavy equipment heat, 24-hour running).
- Hotel guest rooms: 120-150 W/m2 (low occupancy, usage concentrated at night).
Conversion: 1 rated hp is about 2,500 W of cooling. Example: a 100 m2 standard office needs 15,000-18,000 W, roughly 6-7 hp.
Note: these are estimates only. Actual selection also accounts for ceiling height (add capacity above 3 m), west-facing exposure, large windows (floor-to-ceiling glazing) and whether fresh-air systems exist. Have a professional survey the site before finalizing.
3. Selection by Commercial Scenario
- Office buildings: prefer VRF - each office controls its own temperature and shuts down when unoccupied after work, saving energy. Large open-plan floors can use ducted systems for even airflow. Very large office towers (20,000 m2+) can consider water systems for lower running cost.
- Malls and supermarkets: large areas favor water systems for comfort and low running cost; small shops (under 200 m2) can use VRF or ducted units for flexible installation and easy control.
- Hotels: VRF for guest rooms - each room independent, on at check-in and off at check-out, for strong savings. Lobbies, restaurants and meeting rooms can use water or ducted systems.
- Restaurants: prefer ducted systems - even airflow, fresh-air intake, low initial cost. Multiple private rooms can use VRF for independent control.
- Hospitals: high indoor-air quality demands - choose central AC with fresh-air purification; special areas such as operating rooms need dedicated clean-room AC.
4. Efficiency and Noise
Efficiency: the efficiency grade is a key indicator; the national standard runs grades 1-5, with grade 1 the most efficient. Grade 1 costs more upfront, but commercial units run long hours, so the savings show quickly - we recommend grade 1 or 2. Also check IPLV (integrated part-load value): since commercial AC mostly runs at part load, IPLV matters more than the rated COP.
Noise: commercial spaces - especially offices, hotel rooms and hospital wards - demand quiet. Indoor units typically run 25-45 dB. For noise-sensitive rooms such as bedrooms and guest rooms, pick 25-30 dB low-noise units; public areas such as offices and malls are fine at 30-40 dB; machine rooms and corridors can take 40 dB and above. Always add vibration isolation and sound dampening at installation to stop noise transfer.
5. Choosing a Brand
Today's commercial AC market has three main camps:
- Japanese brands: DAIKIN, Mitsubishi Electric, Hitachi, Toshiba. Pros: mature technology, stable quality, good efficiency, low failure rates. Cons: higher price, relatively fewer service centers. For buyers who value quality and have the budget.
- Chinese domestic brands: Midea, Gree, Haier. Pros: strong value for money, high market share, extensive service networks, mature technology. Cons: some gap vs. Japanese brands at the premium end. The mainstream choice for most commercial customers.
- American brands: York, Carrier, McQuay. Pros: leading technology in large water systems, stable products. Cons: high price, focused on large projects with few small-project options. For large commercial complexes, hotels and hospitals.
Weigh budget, usage and after-sales together. For most commercial customers, domestic brands (Midea, Gree) offer the best value - their technology and quality are already reliable, and service is more convenient.
6. Installation and After-sales Matter
Commercial AC is often described as "three parts product, seven parts installation" - install quality directly affects results and service life. When choosing an installer:
- pick a qualified, experienced professional team - don't shop on price alone;
- require up-to-spec installation materials - copper piping, insulation and ducts affect performance directly;
- commission the whole system after installation and verify every indoor unit runs normally;
- secure after-sales support - commercial units run hard, so regular maintenance and prompt repair matter.
Gulin Commerce Commercial AC Service
Suzhou Industrial Park Gulin Commerce Co., Ltd. provides one-stop commercial AC service, distributing mainstream brands including Midea, DAIKIN and Gree across VRF, ducted and water-system lines. We offer free site surveys, system design, quotation, installation and after-sales maintenance, having served many offices, malls, hotels and restaurants in Suzhou and nearby areas. Call 0512-68114680.
