Custom Air Handling Systems Engineered for Any Application
Air Notions engineers and manufactures custom air handling systems tailored to meet the precise demands of any application — where standard equipment falls short.
Product Lines
Four Models. Every Application.
Purpose-designed units for direct-fired, indirect-fired, electric/hydronic, and custom cooling applications — each built to perform where standard equipment fails. Split and knockdown construction available on all models.
DF
Model DF
Direct Fired Gas Heating
High-efficiency direct-fired make-up air delivering tempered fresh air to commercial and industrial spaces with precise temperature control.
Efficiency92% Thermal
Turndown25:1
Airflow1,600–100,000 CFM
Gas Input115–14,000 MBH
DT
Model DT
Indirect Fired Gas Heating
Drum and tube heat exchanger ensuring combustion byproducts never mix with the supply airstream. Safe for institutional and critical applications.
EfficiencyMin. 81% Thermal
Turndown15:1
Airflow1,000–160,000 CFM
Gas Input300–7,400 MBH
EH
Model EH
Custom Air Handling & DOAS Units
Fully engineered, high-performance electric and hydronic ventilation for diverse industries. Broad configuration options for any environment.
Airflow1,000–150,000+ CFM
ConstructionDouble Wall
ControlsFully Packaged
Energy RecoveryAvailable
CC
Model CC
Custom Cooling Units
Indoor and outdoor custom cooling units — air-cooled and water-cooled — engineered from 4 to 100 tons with scroll and digital scroll compressor options.
Capacity4–100 Tons
ConfigurationIndoor / Outdoor
CondensingAir & Water Cooled
Digital ScrollAvailable
Retrofits & Custom Designs
When Standard Equipment Won't Do
Air Notions engineers custom replacement units designed to drop into existing infrastructure without structural modifications. Whether a failing rooftop unit, an aging make-up air system, or a complex multizone assembly, we build purpose-designed replacements that match existing curb dimensions, duct connections, and performance requirements exactly.
Split and knockdown construction options allow delivery and assembly in locations where fully assembled units cannot be rigged — mechanical rooms, occupied buildings, and tight-access rooftops. Hot deck and cold deck multizone retrofits are available to restore full zone control without replacing distribution systems.
Custom BAS integration ties each replacement unit directly into existing building automation systems via BACnet IP/MSTP, Distech Eclypse DDC, and custom sequences of operation.
Who We Are
Built on Engineering Expertise
Air Notions specializes in engineering and manufacturing custom air handling systems tailored to the precise demands of any application. Our strength lies in flexibility and technical expertise — delivering solutions optimized for performance, efficiency, and durability in even the most challenging environments.
From industrial process air to critical clean applications, every unit we build is purpose-designed to perform where standard equipment cannot.
Custom Engineering
Every unit purpose-designed for your specific application, environment, and performance targets.
Industrial Durability
Double-wall construction with galvanized, satin coat, aluminum, or stainless steel options.
Technical Flexibility
Extensive configuration options including DX cooling, energy recovery, VFDs, and more.
Ready to Spec Your Project?
Tell us your application requirements and we'll engineer the right solution.
Product Lines
All Models
Five purpose-built lines for commercial and industrial air handling — each with extensive customization options and double-wall construction.
DF
Model DF
Direct Fired Gas Heating
92% efficient direct-fired make-up air for commercial and industrial applications.
Efficiency92%
Turndown25:1
CFM Range1,600–100,000
DT
Model DT
Indirect Fired Gas Heating
Indirect drum and tube exchanger for safe, clean air in institutional environments.
EfficiencyMin. 81%
Turndown15:1
CFM Range1,000–160,000
EH
Model EH
Custom Air Handling Unit
Flexible electric/hydronic ventilation for diverse industries and challenging environments.
CFM Range1,000–150,000+
ConstructionDouble Wall
Energy RecoveryAvailable
CC
Model CC
Custom Cooling Units
Indoor and outdoor custom cooling — air-cooled and water-cooled — from 4 to 100 tons with scroll and digital scroll compressors.
Capacity4–100 Tons
ConfigurationIndoor / Outdoor
Digital ScrollAvailable
Not Sure Which Model?
Our engineers will help you select the right unit for your application.
DF
Model DF
Direct Fired Gas Heating
Key Features & Specifications
Features & Options
Specify This Unit
Get a detailed quote for your application requirements.
About Air Notions
Purpose-Designed. Precisely Engineered.
Air Notions specializes in engineering and manufacturing custom air handling systems tailored to meet the precise demands of any application. Our strength lies in flexibility and technical expertise, delivering solutions optimized for performance, efficiency, and durability in even the most challenging environments.
From industrial process air to critical clean applications, every unit we build is purpose-designed to perform where standard equipment cannot. We work closely with engineers, contractors, and facility managers to develop specifications that meet exact performance targets.
Our manufacturing process combines rigorous engineering standards with hands-on craftsmanship. Every unit undergoes thorough quality checks before leaving our facility, with construction options including galvanized steel, satin coat, aluminum, and stainless steel.
Custom Engineering
Every unit purpose-designed for your specific application, environment, and performance targets.
Industrial Durability
Double-wall construction with galvanized, satin coat, aluminum, or stainless steel casing options.
Energy Efficiency
Up to 92% thermal efficiency and 25:1 turndown with multiple energy recovery options available.
Full Controls Integration
Distech Eclypse DDC, BACnet/MSTP, Resense Remote Display, and custom sequences of operations.
Let's Work Together
Have a challenging air handling project? We want to hear about it.
Retrofit Solutions
Custom-Engineered Replacement Units
When aging equipment fails or no longer meets performance demands, Air Notions engineers purpose-built replacements — designed like-for-like to drop into existing infrastructure without structural modifications or downtime-heavy renovations.
What We Offer
Built to Fit. Engineered to Perform.
Like-for-Like Replacement
Drop-In Unit Replacement
Each retrofit unit is engineered to match the footprint, connection points, and performance profile of the original equipment — minimizing installation time and avoiding costly modifications to existing roof curbs, duct connections, or mechanical rooms.
Construction
Split & Knockdown Construction
Where access constraints make single-piece delivery impossible, units are designed for split or knockdown construction — factory pre-fitted and shipped in numbered sections for fast, accurate field assembly in tight mechanical rooms, rooftops, or constrained access installations.
Dimensional Matching
Custom Curb & Space Matching
Units are dimensionally engineered to match existing roof curbs, floor pads, and spatial envelopes exactly. Custom casing dimensions, connection locations, and discharge orientations are available to ensure a precise fit without alteration to surrounding structure.
Heating Systems
Hot Deck / Cold Deck Multizone
Air Notions engineers custom hot deck and cold deck multizone retrofit units for buildings that rely on multizone distribution systems. Replacement units are built to match existing zone quantities and duct configurations, restoring multizone comfort control without replacing the entire distribution system.
Building Automation
Custom BAS Integration
Retrofit units are available with fully packaged controls engineered to integrate directly into existing building automation systems. Distech Eclypse DDC with BACnet IP/MSTP, custom sequences of operation, and Resense Remote Display options allow seamless tie-in to any BAS platform without third-party retrofitting.
All Heating & Cooling Types
Full System Flexibility
Retrofit units support every heating and cooling configuration — direct-fired, indirect-fired, electric, hydronic, DX cooling, and energy recovery — so the replacement unit can match or upgrade the performance of the original while fitting within the same physical envelope.
Installation Gallery
Retrofit in the Field
Need a Retrofit Solution?
Provide us your existing curb dimensions and performance requirements — we'll engineer a drop-in replacement.
Get in Touch
Request a Custom Air Handling Quote
Tell us about your project requirements and our engineering team will prepare a detailed specification and quote tailored to your application.
Enter any two values and the third calculates automatically.
Indirect Fired
Model DT
81% Thermal Efficiency · 15:1 Turndown Ratio
Enter any 2 values and press Calculate.
CFM
°F
MBH
Gas Output
—MBH
Heat delivered to the supply airstream. Gas Input × 81% efficiency — the remaining 19% exits as combustion exhaust.
Direct Fired
Model DF
92% Thermal Efficiency · 25:1 Turndown Ratio
Enter any 2 values and press Calculate.
CFM
°F
MBH
About Direct Fired
Combustion products mix directly with the supply air — 100% of gas input enters the airstream. The 8% that is not transferred as useful heat exits as water vapour and CO₂, harmlessly diluted into the ventilation air.
Electric Heat
Model EH
100% Efficient · No Combustion
Enter any 2 values and press Calculate.
CFM
°F
kW
Heat Output
—kW
Electric resistance heat is 100% efficient — all kW input converts directly to heat in the airstream. No combustion losses.
