Air Cooler / Evaporator / Condenser
Built in our dedicated 38,000 m² heat exchanger plant, Square unit coolers, blast evaporators, and condensers deliver reliable cooling for cold storage warehouses, blast freezers, and food processing halls.
Coils are built for NH3, CO2, HFC, and glycol systems with copper, stainless steel, or aluminum tubes and 2 to 12 mm fin spacing to match your room temperature and washdown needs.
Manufactured in a dedicated 38,000 m² finned heat exchanger facility
Engineered for NH₃ (R717), CO₂ (R744), HFC, and glycol/brine circuits
Selectable copper, stainless steel (SS304/SS316), and aluminum coil metallurgy
ASME, PED, and CE pressure tested coils from 5 kW to 500+ kW per unit
Deployed across cold storage, food processing halls, blast freezers, and distribution hubs
Product Features
Why Choose Square's Air Cooler | Evaporator | Condenser
Matched tube and fin materials, fin spacing, fan types, and defrost options for every room.
Ceiling Mounted Air Cooler
High throw ceiling mounted unit coolers engineered for cold storage warehouses, distribution centers, and holding rooms from −35°C to +15°C.
Dual Discharge Processing Hall Air Cooler
Dual side discharge blows chilled air gently along the ceiling instead of onto workers, keeping meat, seafood, and packing halls at a comfortable +2°C to +12°C.
Compact Commercial Air Cooler
Low profile ceiling coolers built for walk in chillers, kitchens, and cold rooms with low ceilings and quiet fan requirements.
Tailored Heat Exchanger Coils
Custom circuited coils available in tube diameters from 9.52 to 25.4 mm with staggered or inline tube geometry, matched to DX, pump recirculated, or secondary coolant duties.
High Efficiency Axial & Centrifugal Fans
High efficiency axial and centrifugal fans (250 to 910 mm) with AC or variable speed EC motors, long air throw, low noise, and heated fan rings for subzero rooms.
Multiple Material Coil Construction
Built with copper, stainless steel, or aluminum tubes and aluminum, Al-Mg alloy, coated, or copper fins in 2 to 12 mm spacing for DX, pumped, or glycol systems.
Hygienic Casing & Hinged Drip Tray
Powder coated galvanized steel, aluminum, or SS304/SS316 stainless steel casings with hinged fold down drain pans for full interior cleaning access. Every coil is 100% pressure tested prior to shipment.
Configurable Defrost Systems
Choose electric heaters, hot gas coil and pan loops, water defrost, or combined hot gas and water defrost to match your room temperature and frost load.
Technical Specifications
Parameters
Standard specifications are listed below. We size tube materials, fin spacing, fans, and defrost systems to match your cold room.
| Product types | Air coolers (unit coolers) / Evaporators (process) / Condensers (air cooled / evaporative) |
|---|---|
| Capacity range | 5 to 500+ kW per unit (multiple units for larger duties) |
| Refrigerants | NH₃ (R717) / CO₂ (R744) / HFC / Glycol / Brine |
| Coil construction | Copper tube / Aluminium fin (standard); Stainless steel tube/fin (optional) |
| Tube diameter | 9.52 / 12.7 / 15.88 / 19.05 / 25.4 mm |
| Fin spacing | 2 to 12 mm (per frost, cleanliness, and temperature application) |
| Casing material | Galvanized steel / Aluminium / Stainless steel (SS304 / SS316) |
| Fan type | Axial (standard) / Centrifugal (high static pressure) |
| Fan motor | AC shaded pole / EC electronically commutated (variable speed) |
| Defrost | Electric / Hot gas / Water (per application) |
| Operating temperature | −45°C to +15°C (air coolers); to +50°C ambient (condensers) |
| Certification | CE / ASME / PED (pressure components) |
| Typical lead time | 8 to 14 weeks (custom built) |
| Design life | 15 to 20 years (coils); 10 to 15 years (fans, normal operation) |
Design Details
How Each Subsystem Is Engineered
Open each section below to see how key parts of the heat exchangers work.
Air Cooler vs. Evaporator vs. Condenser
Air Cooler (Unit Cooler): The indoor unit that circulates cold air in a refrigerated space. Contains an evaporator coil, fans, and a casing. Mounted on the ceiling or wall of a cold room, freezer room, or processing area.
Evaporator (Process): A heat exchanger where liquid refrigerant evaporates, absorbing heat from the process fluid (air, water, glycol, or product).
Condenser: Rejects system heat to the ambient environment. Air cooled condensers use ambient air; evaporative condensers use water evaporation for more efficient heat rejection.
Fin Spacing & Frost Management
Fin spacing is the critical design parameter for low temperature air coolers:
- Low temperature (−25 to −40°C, high frost): 6 to 12 mm fin spacing
- Medium temperature (−5 to −25°C, moderate frost): 4 to 6 mm
- High temperature (+2 to +15°C, minimal frost): 2 to 4 mm
- Variable spacing: wider at air entry (heaviest frost), tighter toward exit
Material Selection for Environment
Standard: Copper tube, aluminium fin, galvanized casing. For general cold storage.
Food processing: SS304 casing, epoxy coated aluminium fins. For washdown areas.
Coastal/marine: SS316 casing, epoxy coated or copper fins. For salt water environments.
Maximum hygiene: Full SS316 construction. For pharmaceutical or high acid environments.
Fan Technology & Energy Efficiency
EC (Electronically Commutated) Variable Speed Fans: Deliver 20 to 30% higher electrical efficiency than conventional AC motors, stepless 10 to 100% speed modulation to match part load cooling duties, and lower radiated heat into the cold room.
High Efficiency Axial Fans: EU ErP compliant axial fan assemblies (250 to 910 mm diameter) with long horizontal air throw and optional anti frost fan ring heaters for subzero chambers.
Centrifugal Fans: High static pressure fan configurations engineered for ducted air distribution or process freezing enclosures.
Defrost System Design
Defrost configuration is matched to room operating temperature and frost accumulation rate:
- Electric Resistance Defrost: Stainless steel tubular heating elements inserted directly into the finned coil block and double skin drain pan
- Hot Gas Defrost: Directs compressor discharge gas through the coil circuit and drain pan loop for rapid, energy efficient frost removal
- Water / Combined Defrost: Overhead water distribution trays flush heavy frost from low temperature evaporator banks in 8 to 15 minutes
Proven in These Food Applications
Cold Storage Rooms
Maintains uniform temperature and humidity across chilled (+2°C to +10°C) and frozen (−18°C to −30°C) food storage warehouses.
Food Processing Areas
Dual discharge ceiling unit coolers deliver draft free, low velocity chilled air (+2°C to +12°C) for meat, poultry, and seafood cutting and packing halls.
Blast Freezers
Heavy duty floor and ceiling blast evaporators with wide fin spacing (8 to 12 mm) for rapid batch freezing rooms down to −40°C.
Outdoor Condensers
Air cooled and evaporative condensers built for reliable heat rejection in outdoor temperatures up to +50°C.
Case Studies
Air Cooler / Evaporator / Condenser in Operation Worldwide
Proven installations running in food plants around the world.
Box in Box Cold Storage Deployment in North America
Modular PIR insulated cold room envelopes and refrigeration packages engineered inside existing dry warehouse shells
Spiral Cooling and Freezing Line for Steamed Dumplings: Chicago, USA
An integrated ambient spiral cooler and NH3/Bitzer refrigerated spiral freezer system installed in Chicago to
Integrated Freeze Drying Cold Chain System for Pet Food: California, USA
Custom low temperature refrigeration and freezing systems supplied to Canature Processing Ltd. for high capacity
Spiral Dumpling Freezing System for ITACI SRL: Ancona, Italy
A custom built spiral freezer and refrigeration system delivered to ITACI SRL in Ancona, Italy,
Frequently Asked Questions
Our units combine high-efficiency coils simulated with European heat exchanger software, EU ERP energy-saving compliant fans (250 to 910 mm diameter), and smart defrosting controls to minimize energy consumption without compromising cooling performance.
Yes. Our evaporators and air coolers use optimized fin spacing (4, 7, 10, or 12 mm and variable fin pitch designs) paired with electrical anti-frost heaters and combined defrost systems to delay frost buildup and maintain efficiency in high-humidity, sub-zero rooms.
Square holds ISO 9001, ISO 45001, CE, PED, ASME (U and U2 stamps), EAC, CSA, CRN, and CNAS laboratory accreditation, supported by 300+ patents, 300+ R&D engineers, and 300+ installation and service engineers.
We customize tube and fin materials, fin spacing, casing steel, fan type, airflow direction, refrigerant circuit, and defrost method for any cold room or freezer.
Engineering Inquiry
Discuss Your Air Cooler / Evaporator / Condenser Project
Send us your room temperature and heat load for a heat exchanger quote.
