Allied Air Enterprises A80UH User Manual

506526-01

Page 2 of 39

Issue 1031

Model 

A

368

14-1/2

B

C

in.

mm

in.

mm

in.

mm

340

13-3/8

330

13

090-12

135-20

533

21

504

19-7/8

495

19-1/2

622

24-1/2

546

23-3/8

584

23

D

in.

mm

248

9-3/4

203

8

121

4-3/4

070-08

090-16

110-16
110-20

070-12

045-12

045-08

110-12

446

17-1/2

416

16-3/8

406

16

159

6-1/4

1

 NOTE - 20C and 20D size units installed in upflow applications

that require air volumes of 1800 cfm (850 L/s or greater must

have one of the following:

1.  Single side return air with transition, to accommodate

     20 x 25 x 1 in. (508 x 635 x 25 mm) air filter.

2.  Single side return air with optional RAB Return Air Base

3.  Bottom return air.

4.  Return air from both sides.

5.  Bottom and one side return air.

2  

Flue outlet may be horizontal but furnace must be vented

vertically.

3  

Optional external side return air filter kit cannot be used with

the optional RAB Return Air Base.

* 

Consider sizing requirements for optional IAQ equipment before

cutting side return opening.