We use cookies to enhance your experience, analyze site usage, and support our marketing efforts. By clicking 'Accept All,' you agree to the storing of cookies on your device. You can customize your preferences or opt out of non-essential cookies at any time.
Products
HygenAir - Hygienic Air Handlers
Colmac Coil HygenAir™ A+H Hygienic Air Units are engineered to help food processing and packaging facilities maintain controlled, sanitary, and efficient production environments. Designed for rooftop installation, HygenAir™ units condition and deliver air to processing rooms while managing four critical functions: temperature control, humidity control, room pressurization, and airborne contaminant filtration.
By removing HVAC equipment from the processing space, HygenAir™ units support cleaner room designs, simplify sanitation procedures, and help reduce the risk of airborne contamination. The result is a robust hygienic air handling solution for facilities focused on food safety, product quality, worker comfort, and operational reliability.
HygenAir™ A+H units are suitable for a wide range of food processing applications, including meat, poultry, dairy, bakery, deli products, prepared foods, and packaging operations.
Purpose-Built for Hygienic Processing Rooms
Food processing environments present demanding air handling requirements. High humidity can contribute to condensation and mold growth, air migration can introduce contaminants from adjacent spaces, and changing process loads, sanitation cycles, and product temperature requirements must be controlled reliably.
HygenAir™ A+H Hygienic Air Units are engineered as a high-performance alternative to traditional ceiling-hung air units by locating air handling equipment outside the processing space, typically in a rooftop-mounted configuration. This helps simplify sanitation, improve access for maintenance, and reduce equipment exposure within the hygienic production area.
To support hygienic room operation, HygenAir™ A+H units provide precise temperature management, humidity control, airborne contaminant filtration, room pressurization, and sanitation/purge operation. Integrated cooling and reheat capability helps maintain room temperature and reduce moisture in the air, while multi-stage filtration captures airborne particles from outdoor and recirculated air before supply air is delivered back to the processing space. Controlled outdoor air introduction helps maintain positive room pressure and reduce air migration from adjacent areas, and a 100% outdoor air purge cycle can be used to support sanitation procedures.
Key Advantages
HygenAir™ A+H units are available in a full product line from 6,000 cfm to 90,000 cfm, with standard single-piece and multi-piece configurations. Custom base sizes are also available to meet specific project requirements.
Single-Piece Units
A+H6 — 6,000 cfm
A+H12 — 12,000 cfm
A+H18 — 18,000 cfm
A+H22 — 22,000 cfm
Multi-Piece Units
A+H30 — 30,000 cfm
A+H40 — 40,000 cfm
A+H52 — 52,000 cfm
A+H70 — 70,000 cfm
A+H90 — 90,000 cfm
Hygienic Drain Pan Design
HygenAir™ units include full-coverage drain pans throughout the unit interior to promote complete drainage and improve cleanability.
Features include:
304 stainless steel drain pans as standard
304 stainless steel drain pan fasteners
Dual-pitch design to prevent standing water
Fully welded drain pan construction available
Hygienic weld finish options available
Supply Air Fans
HygenAir™ units use efficient supply air fan systems designed for reliable performance and controllable airflow.
Standard and optional features include:
Direct-drive supply fans with VFD control as standard
Plenum fans with direct-drive motors
Non-overloading, single-thickness airfoil impellers
Standard TEFC premium-efficiency motors
Optional EC motors
Optional stainless steel hygienic motor mount
Optional washdown-duty motor
Integral Exhaust Fans
Integral exhaust fans are available to support room pressure control and air balance.
Features include:
EC exhaust fans on units up to 40,000 cfm, with built-in speed control
Tube-axial exhaust fans with VFDs for larger units
Remote exhaust fan configurations available
Starters and VFDs available for remote fan applications
Customizable Cooling and Reheat Coils
As a manufacturer of industrial refrigeration evaporator coils, Colmac Coil offers extensive coil design flexibility for HygenAir™ units. Cooling and reheat coils can be configured to meet the thermal, hygienic, and refrigeration requirements of the application.
Available coil features include:
Standard stainless steel tube / aluminum fin construction
Inline or staggered tube patterns
Optional epoxy-coated aluminum fins
Optional antimicrobial fins
Multiple tube diameters and fin thicknesses
Multiple fin and tube material options
Coils designed and manufactured by Colmac Coil in accordance with ASME B31.5
Supported refrigeration system types include:
CO₂ direct expansion, up to 1,800 psi
NH₃ direct expansion
Low-overfeed NH₃
Flooded NH₃
Multi-circuit freon coils
Sequential defrost configurations
Inline and Staggered Tube Pattern Options
HygenAir™ coils can be selected with inline or staggered tube patterns depending on project priorities.
Inline tube patterns can provide lower air pressure drop, easier cleaning, improved frost carrying capacity, and longer runtime between defrosts.
Staggered tube patterns can provide a more compact coil design and reduced first cost, where appropriate for the application.
Multi-Stage Filtration
The filtration system is a critical component of the hygienic air handling system. HygenAir™ units can be equipped with multiple filter stages to help remove airborne contaminants from outdoor air and recirculated room air.
Available filter options include:
Pre-filters: MERV 8 or MERV 9
Intermediate filters: MERV 9, MERV 11, or MERV 13
Final filters: MERV 11, MERV 13, MERV 14, MERV 15, MERV 16, or HEPA H13
Optional additional filter sets
Controls
HygenAir™ A+H units are available with integrated control systems designed to support precise operation and facility-specific customization.
Standard and optional controls include:
Allen-Bradley CompactLogix PLC system with Ethernet communication
In-house PLC engineering and customization capability
PanelView Plus 7 with 6-inch display mounted on the main control panel
Optional 10-inch display upgrade
VFD controls for supply and exhaust fans
Direct-fired burner startup, shutdown, and safety monitoring
Fused disconnects
Optional NEMA 4X stainless steel remote panel
Heating Options
HygenAir™ units can be configured with heating systems to support outdoor air tempering, sanitation cycles, and room operating requirements.
Available heating options include:
Direct-fired propane or natural gas burner
Modulating gas control valve
80°F temperature rise capability
Optional steam heating coil
Optional hot water heating coil
Indirect heaters available as a custom feature
Dampers
HygenAir™ units include high-quality actuated dampers for control of return air and outdoor air.
Low-leakage airfoil control dampers
Fully actuated operation
Aluminum, galvanized steel, or stainless steel construction options
NEMA 4 modulating actuators with position feedback
Supply and Return Air Diffuser Features
Colmac Coil can provide supply and return air components designed for hygienic processing spaces.
Available Features Include:
304 stainless steel supply air diffusers
Adjustable air louvers
Fastened construction with caulked seams
Optional fully welded diffuser construction
Fully seal-welded drain pans
Heat-traced insulation covers
Custom diffuser sizes and shapes
Return-air drop boxes or return-air drip pans
Additional Options
HygenAir™ A+H units can be configured with a wide range of options to meet facility requirements, including:
UV light disinfection
Room pressure control mode
Economizer mode
Refrigerant detection
Smoke detection
Unit-mounted smoke detector
HEPA filters
Reheat coils
Motor service rails for motor removal system
Flooded surge vessels
Surge drum platform, ladder, and handrails
Snow hood for outdoor air
Stainless steel interior with caulked joints
Shrink-wrap packaging on select unit sizes
Supply air diffusers
Return-air drop boxes or return-air drip pans
Applications
HygenAir™ A+H units have been installed in a range of food processing facilities, including beef processing, poultry processing, dairy, deli products, processed foods, and pizza toppings production. Completed projects include installations throughout the United States and Mexico, with unit capacities ranging up to 90,000 cfm.
HygenAir™ A+H Hygienic Air Units are designed for food processing and packaging environments, including:
Meat processing
Poultry processing
Dairy processing
Bakery production
Deli products
Prepared foods
Pizza toppings production
Food packaging rooms
Cold processing areas
Sanitation-intensive production spaces
Products
HygenAir™ Selection Software
HygenAir™ A+H Hygienic Air Units are supported by Colmac Coil’s proprietary HygenAir™ Selection Software. The web-based software allows users to configure units and quickly generate detailed project information.
The software automatically generates:
Thermal design data
Unit dimensions and weights
Electrical data
Engineering specifications
Specification drawings
Design data sheets
Price summary reports