Make Up Air Units

Make Up Air Units

Our complete line of indoor and outdoor make-up air units gives you a wide range of options to meet your needs. Several options are also available for the outdoor and indirect indoor make-up air unit in Mississauga and Oakville. In addition, our indoor/outdoor direct-fired make-up air unit is an efficient way to supply tempered make-up air to your space.

You’ve exhausted all of the existing air from an interior space; now how do you replace it? You bring in makeup air from another source. For the purpose of an HVAC discussion, your source will be mechanical equipment — makeup air units applications where the air within a building or room cannot be recirculated, or where an HVAC system does not have the means for introducing fresh outside air, are good candidates for makeup air unit is the solution.

F-d modular direct fired heaters

  • Air Volume: 1,000 – 21,000 cfm
  • Maximum SP: 4″ wg. @ standard air density

The Direct Gas Fired Make-Up Air package is designed to deliver tempered make-up air for installations requiring frequent air changes. Units are designed for natural and propane gas applications, and for indoor or outdoor installation.

Direct Gas-Fired Heater, ETL Listed, for use in tempering make-up air. Packages are certified to the ANSI Z83.4a-2001/CSA 3.7a-2001 combined safety standard and are available in sizes up to 2,500,000 BTUH and 21,000 CFM. Units are designed for natural or propane applications and are rated for indoor/outdoor installations in commercial occupancies. A unique feature is the self-adjusting burner profile plates allowing 2-speed and variable-air-volume applications. The plates ensure proper air velocity and pressure drop across the burner for clean combustion. Spring-loaded profile plates react to the momentum of the fresh air stream; therefore, no motors or actuators are needed to drive them, nor do they need to be manually set to a specific position.
Standard features include intermittent spark ignition system with timed safety lockout, and redundant gas valves. Units consist of a galvanized enclosure with an elevated gas burner which burns directly in the air stream. The burner consists of non-clogging, stainless steel combustion baffles attached to a aluminum gas supply section. The burner is capable of nearly 100% thermal efficiency with a maximum turndown ratio of 30 to 1. The products of combustion mix with the make-up air which is introduced into the heater intake directly from outside the building. The burner module has a standard horizontal inlet and discharge duct connection and is located upstream of the blower module. The blower module has a standard horizontal inlet designed to accommodate an outside air inlet hood with standard 2″ filters and screen.
To satisfy a variety of installation requirements, packages are available in a number of configurations which include additions of either a v-bank or an evaporative cooler intake module. All modules bolt together to form a rigid common base structure that mounts onto a single curb structure.
Combination packages that include both exhaust and supply fans mounted on a single roof curb are also available, please contact your sales representative for more information.

  • Electrical Cabinet LED Lights
  • Propane Fuel Application
  • Room Override Thermostat
  • Motorized Intake Damper
  • Remote control panel including summer/winter switch and operating lights
  • Freeze Stat with Bypass Timer
  • Hi/Low Gas Pressure Switches
  • Room Modulating Thermostat
  • High Gas Pressure Regulator
  • Convenience Outlet
  • DX Cooling Coils
  • Evaporative Cooler Intake
  • V-Bank Filter Intake
  • Sloped Filter Intake
  • Auxiliary Starters
  • Inlet Gas Pressure Gauge
  • Indoor Hanging Cradle
  • VAV Packages
  • Roof Curbs
  • Clogged Filter Switch
  • Cooling Thermostat and Interlock
  • Extra Set of V-Belts
  • DDC Control capability for BACnet MS/TP, LonWorks, Johnson N2, and Modbus Protocol
  • Z83.18 Recirculating Configuration
  • G90 galvanized construction
  • Easy access doors
  • Lifting points
  • Pre-wired, pre-piped controls
  • Horizontal or down discharge
  • Vibration isolation
  • High efficiency motors
  • Adjustable drive sheaves
  • Fully insulated casing
  • Stainless steel burner
  • 120 volt control transformer with single point electrical connection
  • Redundant gas valves
  • Intermittent spark pilot with timed safety lockout
  • Electronic flame modulation
  • High temperature limit switch
  • Airflow proving switch
  • Economizer inlet thermostat
  • Motor starter
  • Disconnect switch
  • Burner observation port

F-ibt modular indirect-fired bent tube heaters

  • Air Volume: 800 – 17,000 cfm
  • Maximum SP: 4″ wg. @ standard air density

Providing clean and tempered makeup air to meet your application needs. The push-through design ensures that combustion fumes will not enter the fresh air stream.

The Modular Indirect Fired Bent Tube Heater is designed to deliver clean air into an indoor environment. Units are designed for indoor or outdoor installation and can use either Natural or LP gas. The standard unit includes a blower module and the IBT heater module that is approved in the United States and Canada. The unit is listed to the ANSI Z83.8-2006 and CSA 2.6-2006 standards. Each furnace has a 6:1 Turndown Ratio and a maximum Turndown of 28:1 for the entire unit, depending on total required BTU Capacity and number of furnaces in the unit.
Every unit is programmed to start in high fire mode to ensure consistent light-off and is equipped with an electronic, Vernier-type fully-modulating control system. The duct furnaces are all type-409 stainless steel, and certified by the American Gas Association and approved by the Canadian Gas Association. Each model utilizes at least one, but not more than two, modulating stage(s) and between zero and two additional ON/OFF stages depending on the required heat output. In addition, the speed of its power-vent blower on the modulating furnace(s) is varied as the gas flow changes; thereby maintaining a constant 80% combustion efficiency over the entire gas-firing range of the unit.

Combination packages that include both exhaust and supply fans mounted on a single roof curb are also available; please contact your sales representative for more information.

  • Electrical Cabinet LED Lights
  • 5:1 Turndown for Propane (LP) per Furnace. 23:1 Max
  • Up Discharge
  • Motorized Intake Damper
  • Remote Control Panel
  • High and Low Gas Pressure Switch
  • Mixing Box
  • Variable Air Volume (VAV) Controls
  • Double Wall Construction
  • Blower on Delay (Heat Exchanger Pre-heat)
  • Freeze-stat Option
  • Fire-stat Option
  • Convenience Outlet
  • Extended Drop
  • Single Point Electrical Connection
  • Control Cabinet Heater
  • Dirty Filter Airflow Switch
  • Auxiliary Starters
  • Roof Curbs
  • Indoor Hanging Cradle
  • DDC Control capability for BACnet MS/TP, LonWorks, Johnson N2, and Modbus Protocol
  • Bent Tube In-Shot Style Furnace with Type 409 Stainless Steel Heat Exchanger
  • 80% Constant Efficiency over Entire Gas Firing Range
  • 6:1 Turndown per Furnace, 28:1 Max
  • Full Electronic Vernier-type Modulation
  • Forced High Fire Start
  • Variable Speed Power-vent Motor
  • Discharge, Space or Building Automation System (BAS) Temperature Control
  • Isolated and Insulated Electrical Controls Vestibule
  • Natural Gas or Liquid Propane Applications
  • Inlet and Manifold Gas Pressure Indicating Gauges
  • Electronic Push Button adjustment for the Modulating Gas Valve
  • High Temperature Limit Switch
  • Flame Rollout Switch with Manual Reset
  • LED Indicators for Troubleshooting
  • Economizer Inlet Air Thermostat
  • Advanced Human Machine Interface (HMI) Controls

Commercial – Industrial Direct Fired Heaters Series

We offer the most effective make-up air units by major trade names manufacturer provide the most efficient method available to heat make-up air. Direct fired make-up air heaters may consider to be 100% efficient because no heat is vented to the atmosphere.

The theoretical 100% efficiency should be reduced to 92% due to water vapor being formed as a natural by-product of the combustion process. Units are available with heating capacities up to 14,000 MBH and air capacities up to 100,000 CFM. Units are also available in variable capacity, dual capacity, air curtain, and / or heat recovery configurations.

CASING

  • 18 gauge*
  • 14 or 16 gauge available
  • 1” or 2” insulation
  • Solid liners

FINISHES

  • Air dry gray enamel*
  • Corrosion protection
  • Special colours

ACCESS

  • Hinged doors*
  • Lined doors*
  • Camlock handles*
  • Leverlock handles
  • Service platform
  • Service vestibule

FANS

  • Forward curved*
  • Airfoil
  • Backward inclined

MOTORS

  • ODP*
  • TEFC
  • 2 speed
  • High efficiency

FILTERS

  • High velocity*
  • Replaceable media
  • 30% pleated panel
  • 1”, 2”, 4” or 12” as required
  • High effiency
  • Chemical filtration

GAS TRAIN

  • FM
  • IRI / CIRI
  • Up to 25:1 turndown

HEAT RECLAIM

  • QDT Heat Pipe
  • EngA Heat Wheel
  • Glycol Loop
  • Plate Type

COOLING

  • Packaged cooling
  • DX coil
  • Chilled water
  • Evaporative coolers

CONTROLS

  • Electronic
  • Maxitrol
  • M-TRAC
  • 1,300 to 100,000 CFM
  • Up to 25:1 turndown
  • Indoor and outdoor configurations
  • High-Efficiency Green Burn Burners

Industrial Recirculating Direct – Fired Heaters Series

We offer the most effective make-up air units by major trade names manufacturer provide the most efficient method available to heat mix air. Direct fired make up air heaters may consider to be 100% efficient because no heat is vented to the atmosphere.

The theoretical 100% efficiency should be reduced to 92% due to water vapor being formed as a natural by-product of the combustion process. Units are available with heating capacities up to 11,000 MBH and air capacities up to 100,000 CFM. Units are also available in variable capacity, dual capacity, air curtain, and/or heat recovery configurations.

CASING

  • 18 gauge*
  • 14 or 16 gauge available
  • 1” or 2” insulation
  • Solid liners
  • Low leak dampers

FINISHES

  • Air dry gray enamel*
  • Special colours
  • Corrosion protection

ACCESS

  • Hinged doors*
  • Lined doors*
  • Camlock handles*
  • Leverlock handles
  • Service platform
  • Service vestibule

FANS

  • Forward curved*
  • Airfoil
  • Backward inclined

MOTORS

  • ODP*
  • TEFC
  • 2 speed
  • High efficiency

FILTERS

  • High velocity*
  • Replaceable media
  • 30% pleated panel
  • 1”, 2”, 4” or 12” as required
  • High effiency
  • Chemical filtration

GAS TRAIN

  • FM
  • IRI / CIRI
  • Up to 25:1 turndown

HEAT RECLAIM

  • QDT Heat Pipe
  • EngA Heat Wheel
  • Glycol Loop
  • Plate Type

COOLING

  • Packaged cooling
  • DX coil
  • Chilled water
  • Evaporative coolers

CONTROLS

  • Electronic
  • Maxitrol
  • M-TRAC
  • Variable Outdoor Air Volume
  • 1,600 to 100,000 CFM
  • Indoor / Outdoor / Horizontal / Vertical
  • High Efficiency Green Burn Burners

Commercial – Industrial Indirect Fired Heaters Series

We offer the most effective make-up air units by major trade names manufacturer provide models feature high turndown burner, Stainless Steel two or three pass heat exchangers which offer longer heat exchanger life expectancy in cold climate operations with 100% outside air operation capability.

Modes are available with heating capacities between 100 and 3,000 MBH. With 15:1 burner turn down ratios with a range of control options.
Our standard indirect fired heating operates with a nominal combustion efficiency of 81%, also we offer the most advanced models and highest combustion efficiency rating in the marketplace of 91%.

CASING

  • 18 gauge*
  • 1” insulation*
  • 2” insulation
  • 14 or 16 gauge available
  • Solid or perforated liners
  • Stainless Steel
  • Galvanized
  • Aluminum

FINISHES

  • Air dry gray enamel*
  • Special colours
  • Corrosion protection – Heresite, Epoxy

ACCESS

  • Hinged doors*
  • Lined doors*
  • Camlock handles*
  • Leverlock handles
  • Lockable handles
  • Service vestibule

FANS

  • Forward curved*
  • Airfoil
  • Backward inclined
  • Propeller (air turnover)

MOTORS

  • High-Efficiency ODP*
  • High-Efficiency TEFC
  • Variable Speed Drives
  • Two Speed

FILTERS

  • MERV 8 Pleated*
  • Replaceable media
  • 1
  • HEPA
  • Chemical Filtration
  • TRIMED

GAS TRAIN

  • FM
  • GAP (formerly IRI)
  • Up to 15:1 turndown

HEAT RECLAIM

  • QDT Heat Pipe
  • Recovery Air Heat Wheel
  • TRP Air to Air Plate
  • Glycol Run Around

COOLING

  • Packaged cooling
  • DX coil
  • Chilled water
  • Evaporative coolers

CONTROLS

  • DJM modulating discharge air control
  • DJM modulating room control
  • BMS
  • Night Setback
  • Ambient reset
  • Ambient reset
  • Airflow Rate from 1,000 to 44,000 CFM
  • Gas Input Capacities from 100 to 1,400 MBH
  • Turndown Ratio up to 15:1
  • Indoor and Outdoor Configurations
  • Vertical and Horizontal Arrangements

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Contact us to find the right MUA for your needs

In order to find complete information about our indoor and outdoor make-up air units , Call us today at 1-905-624-3854.