Vermont Casting 7PDVS manual Restrictor Orifice Sizes and Models

DV Power Vent System

Restrictor Orifice Sizes and Models

After you plan the venting lay-out and before the installation of the power vent box, check the following chart to make sure the correct orifice is installed.

The power vent box is shipped with the 29/32” restrictor plate orifice in place, used for 36LDVT or 36LDVR models. For all other models, replace the restrictor plate orifice with the correct size according to the following chart:

Models	Input (BTU/h)	Restrictor Orifice Size
33BDVT or 33BDVR	15,000	23/32”
36BDVT or 36BDVR	18,000	29/32”
DVR33	20,000	31/32”
39BDVT or 39BDVR	22,000	31/32”
43BDVT or 43BDVR	25,000	1”
DVRT36	25,000	1”
DV360	30,000	1¹⁄₃₂”
DVRT39	30,000	1¹⁄₃₂”
DVRT43	33,000	1¹⁄₁₆”
360DVS2 or 360DVS3 or 360DVSL or 360DVSR	38,000	1¹⁄₄”
DV580	38,000	1¹⁄₄”
33LDVR or 33LDVT	16,000	29/32”
36LDVR or 36LDVT	19,500	29/32”
39LDVR or 39LDVT (NG)	23,000	31/32”
39LDVR or 39LDVT (LP)	22,500	31/32”
43LDVR or 43LDVT (NG)	26,000	1”
43LDVR or 43LDVT (LP)	24,000	1”
33XDVR	21,500	31/32”
33XDV	21,500	31/32”
36XDV	27,500	1³⁄₈”
39XDV	31,000	1¹⁄₃₂”

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