ACRUD and ACRUB Construction
The ACRU housing is minimum 16 gauge marine alloy aluminum bolted to a rigid aluminum support structure. The base uses a one piece inlet spinning with continuously welded curb cap corners for leak protection, and the windband carries a rolled bead for added strength.
ACRUD direct drive uses a heavy duty motor with permanently lubricated sealed bearings. ACRUD-EC swaps in an electronically commutated motor with either an internal potentiometer or leads for a 0-10 VDC controller.
ACRUB belt drive adds a NEMA design B motor, cast iron drives sized to 150 percent of installed motor horsepower, and regreasable ball bearings in a cast iron pillowblock rated L50 above 200,000 hours. The belt drive top cap opens on stainless steel quick release latches, so motor access needs no tools. Lifting lugs are built in for rigging.
ACRU Models, Sizes, and Pressure Builds
The ACRU comes in 3 pressure builds so you can match the fan to your static. Standard ACRU covers most jobs, ACRU-HP is the high pressure build, and ACRU-XP is the extended pressure build. ACRUD-EC adds six direct drive sizes with electronically commutated motors, from 74 to 2,598 CFM.
| Build |
Direct (ACRUD) |
Belt (ACRUB) |
Airflow |
Static |
| ACRU standard |
9 sizes, 70 to 195 |
17 sizes, 100 to 490 |
200 to 28,800 CFM |
0 to 1-1/2 in. |
| ACRU-HP (high pressure) |
4 sizes |
11 sizes |
700 to 19,200 CFM |
1/4 to 2-1/2 in. |
| ACRU-XP (extended pressure) |
3 sizes |
10 sizes |
800 to 11,000 CFM |
1 to 4-1/2 in. |
Every standard ACRUD direct drive model is below, with the roof opening it needs and its approximate shipping weight. Sizes that have their own page link straight to it.
| Direct Model |
Size |
Roof opening (sq, in.) |
Ship wt. (lb) |
| 70ACRUD |
70 |
13-1/2 |
20 |
| 90ACRUD |
90 |
13-1/2 |
28 |
| 100ACRUD |
100 |
13-1/2 |
30 |
| 101ACRUD (101R15D) |
101 |
13-1/2 |
30 |
| 120ACRUD |
120 |
15-1/2 |
67 |
| 135ACRUD |
135 |
15-1/2 |
72 |
| 150ACRUD |
150 |
19-1/2 |
87 |
| 165ACRUD |
165 |
19-1/2 |
90 |
| 180ACRUD |
180 |
25-1/2 |
102 |
| 195ACRUD |
195 |
25-1/2 |
110 |
Belt drive ACRUB models run larger and reach far higher airflow. Weights below are less motor.
| Belt Model |
Size |
Roof opening (sq, in.) |
Ship wt. (lb) |
| 100ACRUB |
100 |
13-1/2 |
30 |
| 120ACRUB |
120 |
15-1/2 |
61 |
| 135ACRUB |
135 |
15-1/2 |
66 |
| 150ACRUB |
150 |
19-1/2 |
77 |
| 165ACRUB |
165 |
19-1/2 |
83 |
| 180ACRUB |
180 |
25-1/2 |
100 |
| 195ACRUB |
195 |
25-1/2 |
110 |
| 210ACRUB |
210 |
25-1/2 |
220 |
| 225ACRUB |
225 |
25-1/2 |
242 |
| 245ACRUB |
245 |
25-1/2 |
264 |
| 270ACRUB |
270 |
31-1/2 |
286 |
| 300ACRUB |
300 |
31-1/2 |
336 |
| 330ACRUB |
330 |
37-1/2 |
374 |
| 365ACRUB |
365 |
37-1/2 |
420 |
| 402ACRUB |
402 |
43-1/2 |
484 |
| 445ACRUB |
445 |
49-1/2 |
556 |
| 490ACRUB |
490 |
49-1/2 |
715 |
The number stamped on your nameplate looks like 100R15DH or 120R4B rather than 100ACRUD. Here is how to read it.
| Part of the number |
Direct drive, example 100R15DH |
Belt drive, example 120R4B |
| Leading number |
Fan size, 70 through 195 |
Fan size, 60 through 540 |
| Family letter |
R is ACRUD, RH is ACRUD-HP, RX is ACRUD-XP |
R is ACRUB, RH is ACRUB-HP, RX is ACRUB-XP |
| Middle number |
Motor RPM. 10 is 1075, 11 is 1140, 13 is 1300, 15 is 1550, 17 is 1725 |
Motor HP. 2 is 1/6, 3 is 1/4, 4 is 1/3, 5 is 1/2, 6 is 3/4, 7 is 1, 8 is 1-1/2, 9 is 2, 10 is 3, 11 is 5, 12 is 7-1/2, 13 is 10 |
| Drive letter |
D, direct drive |
B, belt drive |
| Last letter |
Wheel flow on sizes 70 to 100 only. H is high, M is medium, L is low |
Not used |
| EC on the end |
Electronically commutated motor |
Not used |
Motor, Wheel, Belt, and Bearing Parts
Plenty of buyers land here needing one part, not a whole fan.
Heinlein stocks and sources Loren Cook replacement parts for every ACRU size, including the motor, the aluminum wheel, the drive belt, and the regreasable pillowblock bearings. An ACRU is a long service unit, and the right part keeps an installed fan running instead of forcing a full replacement.
As an authorized Loren Cook distributor, Heinlein can supply ACRU parts even for units that have left production, the ones that are hardest to track down. We can quote a single part or a complete replacement fan. Have the model and serial number from the nameplate ready and call us.
Frequently Asked Questions
What is the difference between the ACRUD and the ACRUB?
ACRUD is direct drive, with the motor coupled to the wheel for fewer moving parts and less maintenance, in 9 standard sizes from 70 to 195.
ACRUB is belt drive, in 17 standard sizes from 100 to 490, which reach much higher airflow and let you tune fan speed through the drive. ACRUD-EC adds an electronically commutated motor for efficiency and built in speed control.
What do the ACRU-HP and ACRU-XP builds do?
They move the same air against more resistance. Standard ACRU runs to 1-1/2 inches of static. ACRU-HP, the high pressure build, runs to 2-1/2 inches and up to 19,200 CFM.
ACRU-XP, the extended pressure build, runs to 4-1/2 inches and up to 11,000 CFM. Pick by the static your ductwork puts on the fan.
Can the ACRU be used on a kitchen hood?
The ACRU is used in commercial kitchen exhaust, and it takes the Grease Terminator 2 grease capture canister. For grease laden air the Loren Cook fan listed to UL 762 is the VCR series, so tell us what the hood serves and we will point you to the right one.
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Request Current Inventory and Pricing
Same-day shipping is available for in-stock orders placed before 3:00 PM. If the unit or part you need is not listed online, call us for current availability.
Call 773-774-8616
