The King Mini Make-Up Air Unit MMAU Series is designed to “make up” the air in your interior space that has been removed due to process exhaust fans. The building ventilation and the make-up air system work together to ensure the building pressure is maintained, while eliminating temperature fluctuations and a number of air quality issues. The Mini MAU preheats the incoming fresh air at the lowest cost, thus continuously providing comfortable ventilation throughout the building. Featuring a backwards-curve centrifugal blower, the MMAU 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.
It is designed to work with HVAC equipment to provide indoor air quality into a return side or supply side of the ductwork system or alternatively directly into the building space.
- Packaged, All-In-One Make-Up Air Solution
- Compact Design Fits Between Rafters & Joists
- Meets Building Codes Requiring 100% Outside Air Supply
- Tempered makeup air from 175 – 530 CFM @ 0.0" Static Pressure
- 1.5kW to 7.5kW Models
- Available in 120V/208/240V - 1 & 3 Phase
- Proportional Thermostat For Fully Modulating Electric Heat (1°F Accuracy)
- Integrated Timer To Control Air Changes Per Hour (ACH)
- Wide Range of Field-Adjustable Settings of CFM, Temperature Rise & Static Pressure Configurations
- Included Duct Sensor For Precise Set Points
- Current Transformer Technology For Full Integration 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 (not including downflow)
- Washable MERV 7 Air Filter (1" Thick) w/ Replaceable Carbon Filter
- Proudly Made in the USA with U.S. & Global Materials
- 5-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 Mini Make-Up Air MMAU 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!
Available Models
Ordering Information - Single Phase
| MODEL | UPC | VOLTS | KILOWATTS | BTU (000) | AMPS | PHASE | FAN DIAMETER | CASE SIZE | DUCT COLLAR | REVIT |
|---|---|---|---|---|---|---|---|---|---|---|
| MMAU1201-1-175-4-PTT | 70384 | 120 | 1.5 | 5.1 | 12.5 | 1Ph | 175 | A | 4" | Revit |
| MMAU2002-1-175-4-PTT | 70388 | 208 | 2.25 | 7.7 | 10.8 | 1Ph | 175 | A | 4" | Revit |
| MMAU2005-1-220-6-PTT | 70390 | 208 | 4.5 | 15.4 | 21.6 | 1Ph | 220 | B | 6" | Revit |
| MMAU2006-1-220-6-PTT | 70392 | 208 | 5.7 | 19.5 | 27.4 | 1Ph | 220 | B | 6" | Revit |
| MMAU2008-1-220-6-PTT | 70396 | 208 | 7.5 | 25.6 | 36.1 | 1Ph | 220 | B | 6" | Revit |
| MMAU2402-1-175-4-PTT | 70389 | 240 | 2.25 | 7.7 | 9.4 | 1Ph | 175 | A | 4" | Revit |
| MMAU2405-1-220-6-PTT | 70391 | 240 | 4.5 | 15.4 | 18.8 | 1Ph | 220 | B | 6" | Revit |
| MMAU2406-1-220-6-PTT | 70394 | 240 | 5.7 | 19.5 | 23.8 | 1Ph | 220 | B | 6" | Revit |
| MMAU2408-1-220-6-PTT | 70398 | 240 | 7.5 | 25.6 | 31.3 | 1Ph | 220 | B | 6" | Revit |
Ordering Information - Three Phase
| MODEL | UPC | VOLTS | KILOWATTS | BTU (000) | AMPS | PHASE | FAN DIAMETER | CASE SIZE | DUCT COLLAR | REVIT |
|---|---|---|---|---|---|---|---|---|---|---|
| MMAU2006-3-220-6-PTT | 70393 | 208 | 5.7 | 19.5 | 15.8 | 3Ph | 220 | B | 6" | Revit |
| MMAU2008-3-220-6-PTT | 70397 | 208 | 7.5 | 25.6 | 20.8 | 3Ph | 220 | B | 6" | Revit |
| MMAU2406-3-220-6-PTT | 70395 | 240 | 5.7 | 19.5 | 13.7 | 3Ph | 220 | B | 6" | Revit |
| MMAU2408-3-220-6-PTT | 70399 | 240 | 7.5 | 25.6 | 18 | 3Ph | 220 | B | 6" | Revit |
Engineering Specs
Engineering Specifications
Contractor shall furnish and install King MMAU Series Mini Make-Up Air Unit manufactured by King Electrical Manufacturing.
Performance Range: 175–530 CFM at 0.0 in. w.c. and 1.5–7.5 kW, depending on model.
Electrical: 120, 208, or 240 V; single- or three-phase, as scheduled.
Motor: Direct-drive, high-efficiency, thermally protected, permanently lubricated ECM motor with no belts to adjust or maintain.
Blower: Backward-curved centrifugal blower for compact ducted make-up-air applications.
Fan Speed Control: Digital dual-speed blower control shall provide field-adjustable LOW and HIGH settings from 750 to 3,200 RPM.
Modulating Heat: Solid-state relays (SSRs) shall provide fully modulating heat and be mounted in the blower compartment for incoming-air cooling.
Temperature and Timer Control: A digital proportional controller shall modulate heat to maintain discharge-air temperature within 1°F. Temperature shall be adjustable from 45°F to 90°F, with a 0- to 60-minute-per-hour cycle timer.
Duct Sensor: A field-installed Type 2 NTC, 10K-ohm duct sensor shall control discharge-air temperature. Install at least 3 ft downstream of the unit.
Heating Elements: Quick-heating, long-life Pic-A-Watt® elements shall provide field-selectable output and be steel-frame supported with ceramic insulators.
Low-Voltage Terminal Block: All low-voltage control wiring shall terminate at a 14-point terminal strip with factory-side quick connections and field-side screw terminals.
Control Circuit: Built-in relay-logic control with dedicated 24 VAC power shall support a motorized damper, exhaust fan, HRV/ERV relay, and low- and high-speed fan-demand inputs.
Current Transformer Integration: Low-voltage provisions shall accommodate a field-installed current transformer to coordinate operation with the exhaust system.
Lockout Circuit: A lockout circuit shall accept an outdoor thermostat, humidistat, or BMS input to prevent operation until external conditions are met.
Overtemperature Protection: A 24 V high-temperature limit circuit shall protect each heating element. An electrically held manual limit shall monitor the entire unit and require power to be disconnected for several minutes before reset.
Enclosure: The MMAU shall be constructed of welded, 20-gauge electrogalvanized sheet metal with a corrosion-resistant gray finish. Unpainted sheet steel is not acceptable. Side access shall be provided for wiring, adjustments, and service.
Mounting and Clearances: The compact, plenum-rated unit shall be certified for zero-clearance horizontal or vertical installation, except downflow. Mounting provisions shall include joist hangers, a surface flange, and 1/4-20 suspension points.
Wiring Access: Provide separate line- and low-voltage access knockouts and knockouts for an optional disconnect.
Filter: The unit shall include a 1-in. washable MERV 7 filter and replaceable carbon filter.
Duct Noise Control: An integral duct noise silencer shall be standard.
Optional Disconnect: The unit shall have the option to mount an internal supply-power disconnect.
Approvals: The MMAU shall be Underwriters Laboratories (UL) approved and labeled. The unit shall meet UL 1995 requirements and City of Chicago codes for plenum use.
Related Products
Model CKL
- 208, 240, 480 volt
- 30,000 to 240,000 watt
Approved for use in inaccessible areas of buildings. Can withstand dirty, dusty, moist or mildly corrosive environments. Ideal for large offices or factories.
Model MAU Series
- 208, 240, 480V volt
- 3,800 to 34,500 watts
Looking for fresh air? Exhaust systems are often very powerful, removing thousands of cubic feet of air per minute. When air is removed from your kitchen, it needs to be replaced with fresh air. King's Made in USA Make-Up Air Unit is a smart solution.