Catalog Index
Model Numbers	Accessories	Details	Duct Fill Capacities

Duct Fill Capacities

(This information is to be used as a guide for selecting the proper size duct and is based upon 50% fill capacity. Amounts may vary due to method of installation.)

Model No.	Size WxH	Fill Capacity 12AWG 0.158 Insulation Dia.	Fill Capacity 14AWG 0.165 Insulation Dia.	Fill Capacity 14AWG 0.139 Insulation Dia.	Fill Capacity 16AWG 0.125 Insulation Dia.	Fill Capacity 18AWG 0.113 Insulation Dia.	Fill Capacity 22AWG 0.065 Insulation Dia.
WD.5x.5	.5 x .5	6	5	8	9	11	35
WD.75x2	.75 x 2	35	32	45	56	68	208
WD1x.75	1 x .75	18	17	24	29	36	109
WD1x1.5	1 x 1.5	37	34	48	59	72	218
WD1x2	1 x 2	47	43	61	75	92	279
WD1x3	1 x 3	74	68	96	118	145	438
WD1x4	1 x 4	96	88	124	153	187	566
WD1.5x1.5	1.5 x 1.5	55	50	71	88	107	325
WD1.5x2	1.5 x 2	69	63	89	110	135	408
WD1.5x3	1.5 x 3	110	101	142	175	215	649
WD1.5x4	1.5 x 4	146	134	189	233	285	863
WD2x1	2 x 1	48	44	62	77	94	283
WD2x1.5	2 x 1.5	73	67	94	117	143	432
WD2x2	2 x 2	93	86	121	149	183	552
WD2x3	2 x 3	146	134	188	233	285	860
WD2x4	2 x 4	190	174	246	304	372	1124
WD3x1.5	3 x 1.5	107	96	138	170	208	630
WD3x2	3 x 2	136	125	176	217	266	804
WD3x3	3 x 3	210	192	271	335	410	1240
WD3x4	3 x 4	279	256	361	446	546	1649
WD4x2	4 x 2	194	178	250	310	379	1146
WD4x3	4 x 3	285	262	389	456	558	1687
WD4x4	4 x 4	387	355	500	618	756	2285
WD4x5	4 x 5	489	448	632	781	956	2890
WD5x3	5 x 3	351	322	454	561	687	2077