Clear Air Fresh Air Ventilation systems are designed to provide a continuous supply of fresh indoor air to protect your house or business. By preheating incoming fresh air at the lowest cost, Clear Air provides continuously comfortable ventilation throughout the building. Better Air. Peace of Mind.
Fresh, clean air is essential to good health. But with today’s airtight construction techniques, excess humidity and airborne pollutants can easily get trapped in indoor air. This can result in serious consequences for the structure of your home or business and for the health of its occupants.
Featuring an energy efficient ECM motor, the Clear Air combines a fan driven fully modulating electric heating unit with a fresh air relay logic control circuit providing an extremely versatile all-in-one packaged unit.
- Packaged, All-In-One Fresh Air Solution
- 700-1770 CFM @ 0.2” Static Pressure
- 5kW to 34.5kW Models Available
- Proportional Thermostat For Fully Modulating Electric Heat
- Wide Range of Air of CFM, Temperature Rise & Static Pressure Configurations
- Energy Efficient ECM Motor with 5 Torque Taps
- Available in 208/240V/480V - Single & Three Phase
- Included Duct Sensor For Precise Set Points
- Automatic Damper Control
- Current Transformer Technology For Full Interlock With Exhaust Systems
- Relay Logic Control Circuit Enabling Control of Other Make-Up Air Components (Damper, Exhaust Fans, Outside Thermostat & Humidistat, Etc).
- Horizontal or Vertical Installation
- Compact Footprint
- Includes Filter Housing with 1" Thick Replaceable Air Filter. Compatible with up to 2" Thick Filter (purchased separately)
- Proudly Made in the USA with U.S. & Global Materials
- 3-Year Limited Warranty
Constant Comfortable Ventilation
Today’s airtight homes and offices beg for fresh air. Stale and humid air must be replaced by fresh air. During winter, the incoming fresh air is at too low a temperature to be comfortable and the Clear Air Fresh Air Series preheats the incoming air to your preset temperature.
Now That’s Smart!
The Relay Logic Control Circuit Means It Is Easily Tailored To Any Application
Relay logic control circuit enabling control of other make-up air components (damper, exhaust fans, outside thermostat and humidistat, etc).
Now That’s Smart!
ENERGY SAVINGS meets MAXIMUM FRESH AIR
The Clear Air Fresh Air features a state of the art electronically controlled motor for Maximum Energy Savings and Maximum Fresh Air.
Now That’s Smart!
Restore Public Confidence In Returning To Commercial Buildings
With every system we provide a “Fresh Air Provided Here” window sticker that can be placed on the business’ front door, making sure customers and employees alike are made aware of the commitment the business owner has made to providing a safe and comfortable environment. With better quality air customers can feel safer.
Available Models
Ordering Information - Single Phase
| MODEL | VOLTS | KILOWATTS | BTU (000) | *AMPS | PHASE | # OF ELEMENTS | INTERNAL C/B | MOTOR HP | MOTOR FLA | WT. (lbs) |
|---|---|---|---|---|---|---|---|---|---|---|
| MAU2004-1-ECM-SSR | 208V | 3.8 | 12.8 | 18 | -1Ph | 1 | 60 | 1/3 | 2.7 | 57 |
| MAU2005-1-ECM-SSR | 208V | 5 | 17.1 | 24 | -1Ph | 1 | 60 | 1/3 | 2.7 | 57 |
| MAU2008-1-ECM-SSR | 208V | 8 | 27.3 | 38 | -1Ph | 2 | 60 | 1/3 | 2.7 | 57 |
| MAU2010-1-ECM-SSR | 208V | 10 | 34.1 | 48 | -1Ph | 2 | 60 | 1/3 | 2.7 | 65 |
| MAU2012-1-ECM-SSR | 208V | 12 | 41 | 58 | -1Ph | 3 | 60 | 1/3 | 2.7 | 74 |
| MAU2015-1-ECM-SSR | 208V | 15 | 51.2 | 72 | -1Ph | 3 | 60+60 | 1/3 | 2.7 | 74 |
| MAU2018-1-ECM-SSR | 208V | 17.3 | 58.9 | 83 | -1Ph | 4 | 60+60 | 1/3 | 3.9 | 76 |
| MAU2020-1-ECM-SSR | 208V | 20 | 68.3 | 96 | -1Ph | 4 | 60+60 | 1/2 | 3.9 | 76 |
| MAU2025-1-ECM-SSR | 208V | 25 | 85.3 | 120 | -1Ph | 5 | 60+60+60 | 1/2 | 6 | 81 |
| MAU2030-1-ECM-SSR | 208V | 30 | 102.4 | 144 | -1Ph | 6 | 60+60+60 | 3/4 | 6 | 85 |
| MAU2404-1-ECM-SSR | 240V | 4 | 13.7 | 17 | -1Ph | 1 | 60 | 1/3 | 2.9 | 57 |
| MAU2405-1-ECM-SSR | 208V | 5 | 17.1 | 21 | -1Ph | 1 | 60 | 1/3 | 2.9 | 57 |
| MAU2408-1-ECM-SSR | 240V | 8 | 27.3 | 33 | -1Ph | 2 | 60 | 1/3 | 2.9 | 57 |
| MAU2410-1-ECM-SSR | 240V | 10 | 34.1 | 42 | -1Ph | 2 | 60 | 1/3 | 2.9 | 65 |
| MAU2412-1-ECM-SSR | 240V | 12 | 41 | 50 | -1Ph | 2 | 60 | 1/3 | 2.9 | 74 |
| MAU2415-1-ECM-SSR | 240V | 15 | 51.2 | 63 | -1Ph | 3 | 60+60 | 1/3 | 2.9 | 74 |
| MAU2418-1-ECM-SSR | 240V | 17.3 | 58.9 | 72 | -1Ph | 3 | 60+60 | 1/3 | 2.9 | 74 |
| MAU2420-1-ECM-SSR | 240V | 20 | 68.3 | 83 | -1Ph | 4 | 60+60 | 1/2 | 4.2 | 76 |
| MAU2425-1-ECM-SSR | 240V | 25 | 85.3 | 104 | -1Ph | 5 | 60+60+60 | 1/2 | 4.2 | 81 |
| MAU2430-1-ECM-SSR | 240V | 30 | 102.4 | 125 | -1Ph | 6 | 60+60+60 | 3/4 | 6.2 | 85 |
| MAU2435-1-ECM-SSR | 240V | 34.5 | 117.7 | 144 | -1Ph | 6 | 60+60+60 | 3/4 | 6.2 | 85 |
| MAU4804-1-ECM-SSR | 480V | 4 | 13.7 | 8 | -1Ph | 1 | NO | 1/3 | 0.8 | 57 |
| MAU4805-1-ECM-SSR | 480V | 5 | 17.1 | 10 | -1Ph | 1 | NO | 1/3 | 0.8 | 57 |
| MAU4808-1-ECM-SSR | 480V | 8 | 27.3 | 17 | -1Ph | 2 | NO | 1/3 | 0.8 | 57 |
| MAU4810-1-ECM-SSR | 480V | 10 | 34.1 | 21 | -1Ph | 2 | NO | 1/3 | 0.8 | 65 |
| MAU4812-1-ECM-SSR | 480V | 12 | 41 | 25 | -1Ph | 3 | NO | 1/3 | 0.8 | 74 |
| MAU4815-1-ECM-SSR | 480V | 15 | 51.2 | 31 | -1Ph | 3 | NO | 1/3 | 0.8 | 74 |
| MAU4818-1-ECM-SSR | 480V | 17.3 | 58.9 | 36 | -1Ph | 3 | NO | 1/3 | 0.8 | 74 |
| MAU4820-1-ECM-SSR | 480V | 20 | 68.3 | 42 | -1Ph | 4 | NO | 1/2 | 1.2 | 76 |
| MAU4825-1-ECM-SSR | 480V | 25 | 85.3 | 52 | -1Ph | 5 | NO | 1/2 | 1.2 | 81 |
| MAU4830-1-ECM-SSR | 480V | 30 | 102.4 | 63 | -1Ph | 6 | NO | 3/4 | 1.7 | 85 |
| MAU4835-1-ECM-SSR | 480V | 34.5 | 117.7 | 72 | -1Ph | 6 | NO | 3/4 | 1.7 | 85 |
Ordering Information - Three Phase
| MODEL | VOLTS | KILOWATTS | BTU (000) | *AMPS | PHASE | # OF ELEMENTS | INTERNAL C/B | MOTOR HP | MOTOR FLA | WT. (lbs) |
|---|---|---|---|---|---|---|---|---|---|---|
| MAU2005-3-ECM-SSR | 208V | 5 | 17.1 | 14 | -3Ph | 1 | 60 | 1/3 | 2.7 | 57 |
| MAU2007-3-ECM-SSR | 208V | 7.5 | 25.6 | 21 | -3Ph | 2 | 60 | 1/3 | 2.7 | 57 |
| MAU2010-3-ECM-SSR | 208V | 10 | 34.1 | 28 | -3Ph | 2 | 60 | 1/3 | 2.7 | 65 |
| MAU2012-3-ECM-SSR | 208V | 12.5 | 42.7 | 34 | -3Ph | 3 | 60 | 1/3 | 2.7 | 74 |
| MAU2015-3-ECM-SSR | 208V | 15 | 51.2 | 42 | -3Ph | 3 | 60 | 1/3 | 2.7 | 74 |
| MAU2020-3-ECM-SSR | 208V | 20 | 68.3 | 56 | -3Ph | 4 | 60 | 1/2 | 3.9 | 76 |
| MAU2025-3-ECM-SSR | 208V | 25 | 85.3 | 69 | -3Ph | 5 | 60+60 | 3/4 | 6 | 81 |
| MAU2030-3-ECM-SSR | 208V | 30 | 102.4 | 83 | -3Ph | 6 | 60+60 | 3/4 | 6 | 85 |
| MAU2405-3-ECM-SSR | 240V | 5 | 17.1 | 12 | -3Ph | 1 | 60 | 1/3 | 2.9 | 57 |
| MAU2410-3-ECM-SSR | 240V | 10 | 34.1 | 24 | -3Ph | 2 | 60 | 1/3 | 2.9 | 65 |
| MAU2412-3-ECM-SSR | 240V | 12 | 41 | 29 | -3Ph | 3 | 60 | 1/3 | 2.9 | 65 |
| MAU2415-3-ECM-SSR | 240V | 15 | 51.2 | 36 | -3Ph | 3 | 60 | 1/3 | 2.9 | 74 |
| MAU2418-3-ECM-SSR | 240V | 17.3 | 58.9 | 42 | -3Ph | 3 | 60 | 1/3 | 2.9 | 74 |
| MAU2420-3-ECM-SSR | 240V | 20 | 68.3 | 48 | -3Ph | 4 | 60 | 1/2 | 4.2 | 76 |
| MAU2425-3-ECM-SSR | 240V | 25 | 85.3 | 60 | -3Ph | 5 | 60 | 1/2 | 4.2 | 81 |
| MAU2430-3-ECM-SSR | 240V | 30 | 102.4 | 72 | -3Ph | 6 | 60+60 | 3/4 | 6.2 | 85 |
| MAU2435-3-ECM-SSR | 240V | 34.5 | 117.7 | 83 | -3Ph | 6 | 60+60 | 3/4 | 6.2 | 85 |
| MAU4805-3-ECM-SSR | 480V | 5 | 17.1 | 6 | -3Ph | 1 | NO | 1/3 | 0.8 | 57 |
| MAU4810-3-ECM-SSR | 480V | 10 | 34.1 | 12 | -3Ph | 2 | NO | 1/3 | 0.8 | 65 |
| MAU4815-3-ECM-SSR | 480V | 15 | 51.2 | 18 | -3Ph | 3 | NO | 1/3 | 0.8 | 74 |
| MAU4818-3-ECM-SSR | 480V | 17.3 | 58.9 | 21 | -3Ph | 3 | NO | 1/3 | 0.8 | 74 |
| MAU4820-3-ECM-SSR | 480V | 20 | 68.3 | 24 | -3Ph | 4 | NO | 1/2 | 1.2 | 76 |
| MAU4825-3-ECM-SSR | 480V | 25 | 85.3 | 30 | -3Ph | 5 | NO | 1/2 | 1.2 | 81 |
| MAU4830-3-ECM-SSR | 480V | 30 | 102.4 | 36 | -3Ph | 6 | NO | 3/4 | 1.7 | 85 |
| MAU4835-3-ECM-SSR | 480V | 34.5 | 117.7 | 42 | -3Ph | 6 | NO | 3/4 | 1.7 | 85 |
Ordering Information - Accessories
| MODEL | UPC | DESCRIPTION | WEIGHT(lbs.) | Purchase |
|---|---|---|---|---|
| KFS-DT | 20186 | Transition from 14" x 14" Outlet to 12" round, discharge side | 2.5 | Buy Now |
| RIBU1C | 33347 | Fan Relay 10 Amp SPDT w/10-30 Vac/dc/120 Vac Coil | ||
| CS120AF | 33444 | Current Sensor, 120V, Solid State | 1 |
Ordering Information - Controls Accessories
| Model | UPC | DESCRIPTION | Weight (Lbs.) |
|---|---|---|---|
| DFC120V | 33445 | Digital Fan Control, 5 Modes of Operation - 120V (Requires -CR120 Factory Installed Option) | 1 |
Ordering Information - External Mount Duct Fans Accessories
| MODEL | UPC | VOLTS | DESCRIPTION | Weight (Lbs.) |
|---|---|---|---|---|
| EXT100A | 33446 | 120 | External Mount Duct Fan 4", 118 cfm | 11.6 |
| EXT100B | 33447 | 120 | External Mount Duct Fan 4", 177 cfm | 11.6 |
| EXT150A | 33448 | 120 | External Mount Duct Fan 6", 227 cfm | 11.6 |
| EXT150B | 33449 | 120 | External Mount Duct Fan 6", 396 cfm | 18 |
| EXT200A | 33450 | 120 | External Mount Duct Fan 8", 445 cfm | 18 |
| EXT200B | 33451 | 120 | External Mount Duct Fan 8", 420 cfm | 19 |
Ordering Information - Centrifugal In-Line Fan Accessories
| MODEL | UPC | VOLTS | DESCRIPTION | Weight (Lbs.) |
|---|---|---|---|---|
| MBI100 | 33452 | 120 | Centrifugal In-Line Fan 4", 147 cfm | 12 |
| MBI125 | 33453 | 120 | Centrifugal In-Line Fan 5", 173 cfm | 12 |
| MBI125/100 | 33454 | 120 | Centrifugal In-Line Fan 5"-4", 232 cfm | 12 |
| MBI150 | 33455 | 120 | Centrifugal In-Line Fan 6", 221 cfm | 16 |
| MBI150/125 | 33456 | 120 | Centrifugal In-Line Fan 6"-5", 290 cfm | 16 |
Ordering Information - Ventilation Grills Accessories
| MODEL | UPC | DESCRIPTION | Weight (Lbs.) |
|---|---|---|---|
| AG150 | 33457 | AeroGrill 6" | 5 |
| AG150-C | 33458 | AeroGrill 6", Collar | 6 |
| AG150-CD | 33459 | AeroGrill 6", Collar, Damper | 7 |
| GR100 | 33460 | Adjustable Grill 4", Collar | 1 |
| GR150 | 33461 | Adjustable Grill 6", Collar | 1 |
| GR200 | 33462 | Adjustable Grill 8", Collar | 2 |
| GR100-6PK | 33463 | Adjustable 4", Collar-6 pcs | 4 |
| GR150-6PK | 33464 | Adjustable 6", Collar-6 pcs | 6 |
Ordering Information - Options
| ADD SUFFIX: | DESCRIPTION |
|---|---|
| -1/2HP | 1/2HP Motor & Blower - 4kW to 17.25kW |
| -3/4HP | 3/4HP Motor & Blower - 4kW to 25kW |
Ordering Information - Factory Installed Options
| ADD SUFFIX: | DESCRIPTION |
|---|---|
| -CR120 | 10 Amp Relay, SPDT w/10-30 Vac/dc/120 Vac Coil that switches the 24V heater control circuit |
| -DS32 | 32 Amp, 3-Pole Disconnect Switch w/ Padlock Provision |
| -DS63 | 63 Amp, 3-Pole Disconnect Switch w/ Padlock Provision |
| -DS100 | 100 Amp, 3-Pole Disconnect Switch w/ Padlock Provision |
Engineering Specs
Engineering Specifications
Contractor shall furnish and install King Clear Air Fresh Air Ventilation Systems manufactured by King Electrical Manufacturing.
Motor: Direct drive high efficiency, thermally protected, permanently lubricated ECM motor, no belts to adjust or maintain.
Motor Terminal: Clear Air shall have a 5-point terminal block to easily field adjust the motor torque setting of the ECM motor.
Modulating Heat: 100% fully modulating heating control through Solid State Relay (SSR) technology. The SSR relays shall be mounted in the blower compartment to allow the free flow of incoming air to cool the heat sinks.
Thermostat: Clear Air shall be controlled by an electronic proportional thermostat using a 0 to 10VDC of 4 to 20ma signal. The inbuilt thermostat
can be removed and relocated to room and used as a wall mounted thermostat.
Duct Sensor: Clear Air shall be provided with a field installed duct sensor, type 2 NTC thermistor, 10K ohms.
Heating Elements: Quick heating, long life Ni-Chrome elements supported by a steel frame and insulated with ceramic holders.
LV Terminal Block: All low voltage wires are terminated at a 14-point block with factory side quick connects and field side screw terminals.
Control Circuit: Clear Air shall have a relay logic control circuit providing a dedicated 24V power supply that is switched to activate external devices such as:
a damper, exhaust fan, etc.
Lockout Circuit: Clear Air shall have a lockout circuit for auxiliary devices such as an outside thermostat or humidistat to prevent the Clear Air system from turning on
unless predetermined conditions are met.
Overcurrent Protection: Clear Air shall have a 24V high temperature limit circuit wired in series to protect each individual heating element. In addition, it shall have one electrically held manual limit monitoring the condition of entire unit. If tripped, this limit must be manually reset by shutting off the power, waiting several minutes and then turning the power back on. This provides an extra level of overheating protection to the unit.
Enclosure: Clear Air shall be constructed from 20GA electrogalvanized sheet metal of welded construction and finished with a corrosion resistant gray finished. Unpainted sheet steel is not acceptable. Access to the wiring compartment shall be from the side for easy wiring and maintenance. The unit shall have welded brackets with 6 – 3/8” weld nuts for sturdy mounting either vertically or horizontally. Provide both Line voltage and Low voltage knockouts to speed contractor installation. Provide knockouts for an optional disconnect.
Filter: Includes Filter Housing with 1″ Thick Replaceable Air Filter. Compatible with up to 2″ Thick Filter (purchased separately)
Blower: Centrifugal dual inlet blower shall be used, axial fans not permitted. Blower shall be rigidly mounted to the enclosure with internal welded mounting brackets.
Optional Disconnect: The unit shall have the option to mount an internal Supply Power Disconnect.
Approvals: UL: Clear Air shall be Underwriters Laboratory (UL) approved and labeled.
Related Products
Model KF / KFS ECO2S®
- 240, 208, 480 volt
- 4 KW to 34.5 KW
The ECO2S Series Model adds a state of the art electronically controlled motor and 2 heating stages for added comfort and Maximum Energy Savings.
Model CLEAR AIR
- 208, 240, 480V volt
- 3,800 to 34,500 watts
Clear Air Fresh Air Ventilation systems are designed to provide a continuous supply of fresh indoor air to protect your house or business. Better Air. Peace of Mind. With today’s airtight construction techniques, excess humidity and airborne pollutants can easily get trapped in indoor air. This can result in serious consequences for the structure of your home or business and for the health of its occupants.