Trane UX1B080A9421A DOWNFLOW/ Horizontal Venting Table Maximum Vent Length, Single Pipe Venting

Installer’s Guide

DOWNFLOW/ HORIZONTAL VENTING TABLE

TABLE 11

MAXIMUM VENT LENGTH:

	DIRECT VENT (2 PIPE SYSTEM) -				NONDIRECT VENT (1 PIPE SYSTEM) -
	MAXIMUM TOTAL EQUIVALENT FEET FOR				MAXIMUM TOTAL EQUIVALENT FEET FOR
	VENT AND INLET AIR PIPES (See Notes)				VENT PIPE ONLY (See Notes)
	2" PIPE	2-1/2" PIPE	3" PIPE	4" PIPE	2" PIPE	2-1/2" PIPE	3" PIPE	4" PIPE
MODEL	& FITTINGS	& FITTINGS	& FITTINGS	& FITTINGS	& FITTINGS	& FITTINGS	& FITTINGS	& FITTINGS
*DX1B040A9241A	60	80	100	130	50	80	80	130
*DX1B060A9361A	50	80	100	130	50	80	80	130
*DX1B080A9421A	45	80	100	130	40	80	80	130
*DX1C100A9481A	NOT ALLOWED	80	100	130	NOT ALLOWED	80	80	130
*DX1D120A9601A	NOT ALLOWED	15	60	130	NOT ALLOWED	25	70	130

NOTES: * - First letter may be "A" or "T"

1.The INLET AIR of one pipe systems require the installation of a 90° elbow (to prevent dust and debris from falling straight into the furnace) and a 2 foot horizontal or vertical straight pipe section connected before or after the elbow.

2.DO NOT MIX PIPE DIAMETERS IN THE SAME LENGTH OF PIPE OUTSIDE THE FURNACE CABINET (Except adapters at the top of the furnace).

If different inlet and vent pipe sizes are used, the vent pipe must adhere to the maximum length limit shown in the table above (See Note 7 below for exception). The inlet pipe can be of a larger diameter, but never smaller than the vent pipe.

3.MAXIMUM PIPE LENGTHS MUST NOT BE EXCEEDED! THE LENGTH SHOWN IS NOT A COMBINED TOTAL, IT IS THE MAXIMUM LENGTH OF EACH (Vent or Inlet air pipes in two pipe systems).

4.One standard radius 90° elbow is equivalent to 12' of 4" pipe; one SHORT radius 90° elbow is equivalent to 10' of 3" pipe and one LONG radius elbow is equivalent to 6' of 3" pipe. One SHORT/LONG radius 90° elbow is equivalent to 7½' of 2½" pipe, & 5' of 2" pipe. Two 45° elbows equal one 90°elbow.

5.The termination tee or bend must be included in the total number of elbows. If the BAYVENT100 termination kit is used, the equivalent length of pipe is 5 feet. There is zero equivalent length for the BAYVENT200.

6.Pipe adapters are field supplied.

7.4" pipe may be reduced to 3" for termination with BAYAIR30AVENTA or BAYVENT200 without additional length restriction.

UPFLOW FURNACE						SINGLE PIPE VENTING			Air Inlet	DOWNFLOW
										FURNACE
	B				A (0-2') or greater
					B (0-2') or greater
					A+B = 2' minimum
Air Inlet										Vent only
	A									to outside
									A
					Vent only					A = 2' minimum
h					to outside
							INSIDE
						CORNER DETAIL
							G
						V
									H
D
V	E
					C			B
	V
		B		V	FIXED	B				I
								FIXED	V
	L				CLOSED		OPERABLE
						V		CLOSED
					OPERABLE					M
				V
			F			B	V	X		V	X
						B		J
							A				K
					B
j		V	VENT TERMINAL	X	AIR SUPPLY INLET		AREA WHERE TERMINAL IS NOT PERMITTED
18										18-CD19D6-32