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Products
A+ Series® Air Coolers - Industrial Air Coolers - A+P
Designed for rooftop installation above refrigerated spaces, Colmac Coil A+P Penthouse Evaporators deliver efficient air cooling while relocating refrigeration equipment outside the conditioned environment. Available in capacities up to 100 TR with 1 to 6 fan configurations, A+P units are engineered for uniform air distribution, simplified maintenance, and long-term reliability. Compatible with DX, recirculated, CO₂, glycol, and low-charge ammonia refrigeration systems, each unit is custom engineered to meet the airflow, refrigeration, and installation requirements of the application.
Benefits of a penthouse
Maximizes usable production floor space
Keeps motors and electrical components outside the conditioned space
Simplifies maintenance without entering production areas
Reduces contamination risk during servicing
Improves worker safety through rooftop equipment access
Provides excellent air distribution over large rooms
Minimizes process interruptions during maintenance
Designed for Easy Maintenance
Full-height walk-in access
Roof-mounted equipment access
Simplified fan and motor replacement
Reduced production downtime
Defrost Options
Air
Hot Gas
Electric
Discharge Option
Standard Discharge
Simple and reliable flat deck heat rejection systems featuring vertically discharged airflow for efficient operation and flexible installation across a wide range of condenser and fluid cooler applications.
90 Degree Ducts
Horizontal airflow heat rejection systems designed for applications requiring flexible installation layouts, efficient operation, and reduced height profiles across condenser and fluid cooler applications.
Distribution Plenum
Compact twin-coil V-bank heat rejection systems engineered to maximize capacity density while reducing installation footprint through side air intake and vertical discharge airflow.
Side Discharge
Twin-coil adiabatic V-bank heat rejection systems combining dry and wet operation to maximize thermal performance while reducing energy and water consumption.
Fan Options
EC Fans
High-efficiency EC fans with integrated speed controllers available in multiple sizes and performance configurations. Composite fan blades standard. Power range from 2.67 kW – 3.5 kW.
AC Fans
Robust and versatile AC fan systems with motor sizes ranging from 0.75 hp to 15 hp and fan diameters from 30” to 42”. Available with composite or aluminum fan blades.
Applications
Cold Storage Warehouses
Food Processing
Meat & Poultry Processing
Seafood Processing
Refrigerated Distribution Centers
Dairy Processing
Prepared Foods
Blast Freezers
Blast Chillers
Produce Processing
Pharmaceutical Manufacturing
Industrial Refrigeration Facilities
Materials of Construction
Tube Material
Aluminum
304 stainless steel tubing
316 stainless steel tubing
Fin Material
Aluminum
Epoxy coated aluminum
304 stainless steel
316 stainless steel
Casing Material
G-235 galvanized steel
304 stainless steel
316 stainless steel
Features
Triple-Sloped Drain Pan
Designed to promote positive drainage and minimize standing water
Fully Insulated Enclosure
Improves thermal efficiency while protecting components from outdoor conditions
Sequential Defrost (Dual Coil)
Allows one coil to remain operational while the second coil defrosts, increasing system uptime
Custom Air Distribution
Factory-designed discharge plenums and duct arrangements tailored to the application
Roof-Matched Base
Optional pitched base designed to match building roof slope for simplified installation
Upgrades
VFD Controls
Variable frequency drive (VFD) controls available for AC fan configurations to improve energy efficiency, reduce sound levels, and optimize airflow based on cooling demand
Drain trap heater circuit
Factory-provided drain trap heater circuit designed to help prevent condensate drain freeze-up during low ambient operation.
Sloped Roof
Sloped roof construction with a 1-inch drop over 10 feet to promote water runoff and minimize standing water.
PVC drain trap kit
Factory-supplied PVC drain trap kit shipped loose and partially assembled for simplified field installation.
Convenience Features
Optional features including door interlocks, LED service lights, GFCI service receptacles, refrigerant leak detectors, and other maintenance and safety enhancements.
Resources
Certifications & Warranties
ASME "U" Stamp
ASME Section VIII requirements for pressure-containing equipment
CRN/CSA
Canadian Registration Number (CRN) and CSA certifications available for applications requiring compliance with Canadian pressure vessel and refrigeration equipment regulations
UL 207
UL 207 standards for refrigerant-containing components and accessories, verifying compliance with recognized refrigeration system safety requirements.
Warranty
Colmac Coil warrants its products to be free from defects in materials and workmanship under normal operating conditions. Standard warranty coverage includes repair or replacement of defective components in accordance with Colmac warranty terms. Pressure-bearing stainless steel coil components manufactured in accordance with ASME B31.5 are eligible for extended warranty coverage of up to five years from shipment date.