Miele T 1576 operating instructions Calculate the effective duct length

INSTALLATION INSTRUCTIONS

Calculate the effective duct length

The overall duct length will determine the duct diameter.

^Measure the actual duct length needed:

1.Establish the number of elbows or bends necessary, noting the type of bend, angle and radius involved (see, Table 1).

2.Add the additional duct length as specified in Table 1 to the actual duct length to get the effective duct length.

3.The necessary duct diameter can then be found in Table 2.

Note:

Drying times and energy consumption remain unaltered for 4" (100 mm) duct up to a total length of 66 ft. (20 m).

Longer ducts may lead to slight increases, but, the function will not be impaired as long as the necessary duct diameter is used (Table 2).

Table 1

Type	Angle	Radius		Additional
of bend				duct length
		inch	cm	inch	cm
Flexible	90 °	up to	40.6	20"	50.8
metal duct		16"
	45 °	up to	40.6	12"	30.5
		16"
Smooth	90 °	4"	10	14"	35.6
metal duct
Elbow 90°	90 °			90"	228.5
sharp;
no radius
Concertina	90 °	8"	20.3	28"	71.1
bend
Wall vent kit				142"	360.7
with louvres
or
window
vent kit
Wall vent kit				99"	251.5
with flap or
window
vent kit
Exhaust				193"	490.2
connection
left side

Table 2

Internal diameter or			Effective duct
edge length			length
inches	mm		ft	m
4"	100	0	- 66	0 - 20
5"	125	66	- 100	20 - 30
6"	150	100 - 140		30 - 42.7

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