CU900 SERIES Cabinet Unit Heater
UNIT HEATERS
Technical Specifications
Temp Range: 55°–85°F
CFM: 500–2,000
Ideal Spaces
- School Hallways & Churches
- Transportation Terminals
- Lobbies & Stairwells
- Entrance Ways & Vestibule
- Mechanical Rooms
Available Colors
White, Beige, Aluminum, Bronze, Black, Custom Colors
Contemporary Aesthetics
- Contemporary design to match modern and future architect specifications
- Standard stamped grille with optional ducted grilles
Easy Install and Maintenance
- One-person maintenance on ceiling applications with hinged front panel
- Front cover interlock de-energizes unit when front cover is removed for added safety
- Disposable air filter mounted in inlet air stream; optional permanent and washable aluminum filters available
Robust Design
- Cabinet constructed of heavy 16-gauge cold-rolled steel to provide strength and finished with a polyester powder coating for corrosion resistance
- Motors are mounted with automatic thermal overload protection; motor fuse protection is provided on all heaters to meet safety requirements
- Comes standard with two thermal safety cutouts to automatically shut off and protect the heater in the event of overheating. Reactivates the heater when operating temperature returns to normal
Certifications and Warranty
Certified by UL (Underwriters Laboratories).
Includes a 5-year warranty on the heating element and a 1-year warranty on workmanship.
Custom Cabinet Unit Heaters: Models and Specifications
| SERIES | KW | BTU/HR | FINAL AIR TEMP | CFM* | AMPERAGE | SHIP WT. | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 208 | 10 | 208 | 30 | 240 | 10 | 240 | 30 | 277 | 10 | 480 | 30 | ||||||
| CU935 35 in. (L) | 2 | 6,826 | 85° F | 10 | 6 | 9 | 6 | 8 | 3 | 120 lbs | |
| 3 | 10,239 | 98° F | 500 | 15 | 9 | 13 | 8 | 12 | 4 | ||
| 4 | 13,652 | 111° F | 20 | 12 | 17 | 10 | 15 | 6 | |||
| 5 | 17,065 | 123° F | 25 | 15 | 22 | 13 | 19 | 7 | |||
| 6 | 20,478 | 136° F | 30 | 17 | 26 | 15 | 22 | 8 | |||
| 7 | 23,891 | 148° F | 34 | 20 | 30 | 18 | 26 | 9 | |||
| 8 | 27,304 | 161° F | 39 | 23 | 34 | 20 | 30 | 10 | |||
| CU945 45 in. (L) 160 LBS. | 4 | 13,652 | 85° F | 1,000 | 20 | 12 | 18 | 11 | 16 | 6 | 160 lbs |
| 6 | 20,478 | 98° F | 30 | 18 | 26 | 16 | 23 | 8 | |||
| 8 | 27,304 | 111° F | 40 | 23 | 34 | 20 | 30 | 11 | |||
| 10 | 34,130 | 123° F | 48 | 29 | 43 | 25 | 37 | 13 | |||
| 12 | 40,956 | 136° F | 59 | 34 | 51 | 30 | 44 | 16 | |||
| 14 | 47,782 | 148° F | 68 | 40 | 59 | 35 | 52 | 18 | |||
| 16 | 54,608 | 161° F | 78 | 46 | 68 | 40 | 59 | 20 | |||
| CU968 68 in. (L) 260 LBS. | 15 | 51,195 | 123° F | 1,500 | — | 44 | — | 38 | — | 20 | 260 lbs |
| 21 | 71,673 | 148° F | — | 60 | — | 52 | — | 27 | |||
| 24 | 81,912 | 161° F | — | 69 | — | 60 | — | 31 | |||
| CU978 78 in. (L) 300 LBS. | 20 | 68,260 | 123° F | 2,000 | — | 58 | — | 50 | — | 26 | 300 lbs |
| 24 | 81,912 | 136° F | — | 69 | — | 60 | — | 31 | |||
| 28 | 95,564 | 148° F | — | 80 | — | 70 | — | 36 | |||
| 32 | 109,216 | 161° F | — | 91 | — | 79 | — | 41 | |||
SKU Legend: ★ = Made to Order (Contact your local Marley Sales Representative for typically associated lead times)
NOTE: RED numbers represent circuit breakers or fused disconnect required. **380V units will operate with a 16% reduction in heating capacity. +Based on 60°F inlet air temperature. *Values shown is high speed. All models operate at 60hz.
Multiple Air Flow Combinations
The unit offers multiple air flow combinations for flexible installation. These include: Front Inlet / Front Outlet (FIFO), Front Inlet / Top Outlet (FITO), Bottom Inlet / Front Outlet (BIFO), and Bottom Inlet / Top Outlet (BITO). The unit can be mounted in Wall, Ceiling, or Inverted Wall orientations.
Optional Accessories
Optional Accessories
Trim Kits
| CATALOG NO. | DESCRIPTION | COMPATIBLE WITH | FUNCTION | SHIP WT. |
|---|---|---|---|---|
| CU935RTK* | Ceiling or Wall Recess Trim Kit | CU935 | Provides a neat finish to semi-recessed or full recessed application. | 3 lbs |
| CU945RTK* | Ceiling or Wall Recess Trim Kit | CU945 | Provides a neat finish to semi-recessed or full recessed application. | 4 lbs |
| CU968RTK* | Ceiling or Wall Recess Trim Kit | CU968 | Provides a neat finish to semi-recessed or full recessed application. | 6 lbs |
| CU978RTK* | Ceiling or Wall Recess Trim Kit | CU978 | Provides a neat finish to semi-recessed or full recessed application. | 7 lbs |
Base Kits
| CATALOG NO. | DESCRIPTION | COMPATIBLE WITH | FUNCTION | SHIP WT. |
|---|---|---|---|---|
| CU935BK* | Floor/Toe-Space Base Kit | CU935 | 16 gauge, muted black base is recessed from the heater front and sides to provide an attractive and practical floor mounting application. | 9 lbs |
| CU945BK* | Floor/Toe-Space Base Kit | CU945 | 16 gauge, muted black base is recessed from the heater front and sides to provide an attractive and practical floor mounting application. | 10 lbs |
| CU968BK* | Floor/Toe-Space Base Kit | CU968 | 16 gauge, muted black base is recessed from the heater front and sides to provide an attractive and practical floor mounting application. | 13 lbs |
| CU978BK* | Floor/Toe-Space Base Kit | CU978 | 16 gauge, muted black base is recessed from the heater front and sides to provide an attractive and practical floor mounting application. | 15 lbs |
Filters
| CATALOG NO. | DESCRIPTION | COMPATIBLE WITH | FUNCTION | SHIP WT. |
|---|---|---|---|---|
| CU935WF | Permanent, Reusable Washable Filter | CU935 | Replaces standard filter. Washable filter can be cleaned and replaced. | 4 lbs |
| CU945WF | Permanent, Reusable Washable Filter | CU945 | Replaces standard filter. Washable filter can be cleaned and replaced. | 6 lbs |
| CU968WF | Permanent, Reusable Washable Filter | CU968 | Replaces standard filter. Washable filter can be cleaned and replaced. | 10 lbs |
| CU978WF | Permanent, Reusable Washable Filter | CU978 | Replaces standard filter. Washable filter can be cleaned and replaced. | 12 lbs |
*Add the appropriate color code suffix after the catalog number; (i.e. W for White, B for Black, etc.)
Suggested Controls
Scan the QR code to access additional specs and features.
The CU900 Series is now compatible with SmartSeries Plus when used with a 24VAC control transformer.
A thermostat is available for suggested control, offering features like dual-stage heating and fan control.
Optional Factory-Installed Accessories
| ACCESSORY | DESCRIPTION | STANDARD | OPTIONAL |
|---|---|---|---|
| 2-Stage Thermostat Built-or Remote | Built-in (or remote-mounted) single-pole, single-stage thermostat that cycles the element(s) and fan. Fan speed and element wattage selected by the built-in HIGH or LOW selector switch. | Built-in (or remote-mounted) two-stage thermostat that cycles 2/3 of the element for during first stage and full heat during second stage. Fan cycles on high speed only. | |
| Smartseries Plus (Built-In -r Remote) | Built-in (or remote mounted) two stage thermostat runs 2/3 elements on stage 1 and full heat for stage 2. Fan cycles on high speed only. Comes with BACnet BMS compatibility, scheduling, cooling mode(Fan-Only), and keypad lock. | Supply terminal block in the control compartment. | Supply terminal block in the control compartment. |
| Dead Front Disconnect Switch | A three pole non-fused disconnect switch disconnects power to the heater. Design prevents entry into the control compartment until disconnect switch is turned to the OFF position. | Design prevents entry into the control compartment until disconnect switch is turned to the OFF position. | |
| Dead Front Fused Disconnect Switch+ | A three pole non-fused disconnect switch and circuit breaker(s) sized to the heater load protects heater and disconnects power to the heater. | Design prevents entry into the control compartment until disconnect switch is turned to the OFF position. | |
| On/Off Switch | No switch supplied. | Built-in switch provides continuous fan operation with or without heat, or automatic fan cycling as the heat cycles on and off. | |
| Key Lock For Front Cover | Two (2) slotted head spring latches. | Two (2) toolhead key lock style spring latches prevent unauthorized adjustment of controls and provides additional safety from injury due to contact with internal components. | |
| Inlet or Discharge Duct Collar(S) | Standard Architectural Grilles | Collars provide easy connection of field supplied duct work. We do not recommend exceeding 0.2 in. wg external static pressure. Heater with duct collars are supplied with a single speed high static motor. | |
| Louver Grilles | Standard Architectural Grille. | Retrofit option to match the old louver design of the cabinet unit heater. This option is only available for both inlet and discharge openings ordered at the same time. Can not be ordered separately. |
+ Plus price of circuit breaker.
Dimensions and Clearances
Overall Unit Dimensions (approximate): 35", 45", 68", 78" length; 9-3/4" width; 26-3/8" height.
Keyhole/Conduit Knockout Locations:
- 7/8" AND 3/32" CONCENTRIC K.O.
- 3" CONCENTRIC K.O.
- 1-23/32", 1-23/64", AND 1-31/32" CONCENTRIC K.O.
- DRILL LOCATION FOR CONDUIT HOLE IN RIGHT SIDE: 4-1/4" from the front edge, 5" from the bottom edge.
- Clearances: 6-1/4" from the bottom, 1-5/8" from the front.
