Ducting 4

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Flexidisc sander

Ducting Ratings - Airtronic D5 D1LCC

Read pages 1 and 2 before proceeding, they contain explanations

The following page has calculation examples

Airtronic D5 ducting ratings

Part	description		additional notes	Single duct rating
1	Grille (Inlet & Outlet)	90 mm		0.5
2	Ducting flange connecting socket	100 mm		0
3	Flexible pipe	100 mm	Per metre	0.6
	Flexible pipe 90 degree bend	100 mm	Additional to length rating	0.6 or 0?
	Protective grille	90 mm		0?
4	Protective grille modified	90 100	For adapter cut out mesh	2?
5	Ducting flange connecting socket	90 mm		0
6	Flexible pipe	90 mm	Per metre	1
	Flexible pipe 90 degree bend	90 mm	Additional to length rating	0.2
7	Silencer	90 mm		0.8
	Heater outlet hood straight	90 mm		#0
8	Heater outlet hood 90 degree	90 mm		8 or 1.5
9	Ducting union straight	90 mm		0.5
10	Silencer	100 mm		0.5 or 0.25
11	Ducting union straight	100 mm		0.4
12	Outlet vent with flange	100 mm	Rotatable	2 or 3.25
13	Outlet vent with flange	90 mm	Rotatable	2
14	Y - piece offset 45 degree	100 100 100	Straight through path 45 degree path	? 0.5
15	T - piece offset 90 degree	100 100 100	Straight through path 90 degree path	? 0.5?
16	Y - piece offset 45 degree	90 90 90	Straight through path 45 degree path	? 0.5
17	Butterfly valve with regulating flap Position middle Position right / left	90 90 90	Equal split All to one outlet	1.1 1
18	Reduction piece	100 to 75		3.2 or 2.75
19	Flexible pipe smaller size	75 mm	Per metre	4
**	Flexible pipe smaller size	60 mm	Per metre	[ 5.1 ]
**	Flexible pipe 90 degree bend	90 mm	Additional to length rating	0.2?
	Flexible pipe 90 degree bend	75 mm	Additional to length rating	2?
20	Outlet vent with flange	75 mm	Rotatable	5?
21	Ducting flange connecting socket	75 mm	Rotatable	0
22	Outlet screen closeable	75 mm	Rotatable	Not applicable
23	Ducting flange connecting piece	90 mm		0
24	90 degree upright vent	90 mm	Rotatable	3


**	Smaller ducting ratings change	90 to 60	[ 90 mm rating x 0.2 ]
**	Smaller ducting ratings change	90 to 75	[ 90 mm rating x 0.5 ]
**	Larger ducting ratings change	90 to 100	[ 90 mm rating x 1.5 ]

The duct parts drawings show several typical ducting combinations.

Use them to identify the individual component and then look up its rating in the tables below.

Ratings are for single path ducting, refer to page 1 for dual duct installations.

Refer to notes bottom of page for blue and ‘?’ Entries.

Airtronic D5 with 90 mm diameter outlet hood (Heater rating 10)

D1LCC with 60 mm diameter outlet hood (Heater rating 6)

D1LCC ducting ratings

Part	description		additional notes	Single duct rating
1	Grille (Inlet & Outlet)	60 mm		1.2
2	Ducting flange connecting socket	60 mm		0.3
3	Flexible pipe	60 mm	Per metre	1
**	Flexible pipe larger size	75 mm	Per metre	[ 0.4 ]
**	Flexible pipe larger size	90 mm	Per metre	[ 0.2 ]
**	Flexible pipe larger size	100 mm	Per metre	[ 0.1 ]
	Flexible pipe 90 degree bend	60 mm	Additional to length rating	0.5?
4	Protective grille	60 mm	Heater inlet - twist on	0.15?
5	Heater outlet hood straight	60 mm		0
6	Heater outlet hood 90 degree	60 mm		1.7
7	90 degree bend, plastic elbow	60 mm	Fitting into hood only	3
8	T - piece offset 90 degree	60 60 60	Straight through path 90 degree path	1.2?
9	Outlet grille with connector	60 mm	Rotatable	1
10	Y - piece symmetrical	60 50 50	60 to 50 mm reduction	0.85 0.85
11	Flexible pipe	50 mm	Per metre	1? figure is same as 60 mm duct
	Flexible pipe 90 deg bend	50 mm	Additional to length rating	0.5
12	Ducting flange connecting socket	50 mm		0
13	Grille (Inlet & Outlet)	50 mm		0.6
14	Outlet grille with connector	50 mm	Rotatable	0.6
15	Butterfly valve with regulating flap Position middle Position right / left	60 60 60	Equal split All to one outlet	0 1


**	Larger ducting ratings change	60 to 75	[ 60 mm rating x 0.41 ]
**	Larger ducting ratings change	60 to 90	[ 60 mm rating x 0.20 ]
**	Larger ducting ratings change	60 to 100	[ 60 mm rating x 0.13 ]

Part	description		additional notes	Single duct rating
16	90 degree bend, plastic elbow	75 mm	Fitting into hood only	2
17	Flexible pipe	75 mm	Per metre	1
**	Flexible pipe smaller size	60 mm	Per metre	[ 2.5 ]
**	Flexible pipe larger size	90 mm	Per metre	[ 0.5 ]
**	Flexible pipe larger size	100 mm	Per metre	[ 0.32 ]
	Flexible pipe 90 deg bend	75 mm	Additional to length rating	?
18	T - piece offset 90 degree	75 75 75	Straight through path 90 degree path	0.7
19	Grille (Inlet & Outlet)	75 mm		0.3
20	Ducting flange connecting socket	75 mm		0
21	Outlet vent with flange	75 mm	Rotatable	0.7
22	Butterfly valve with regulating flap Position middle Position right / left	75 75 75	Equal split All to one outlet	0 1
23	Y - piece symmetrical	75 50 50	75 to 50 mm reduction
24	Reducing piece 75 to 50 mm	75 to 50	75 to 60 mm reduction	3.2
25	Flexible pipe smaller size	50 mm	Per metre	1? figure is same as 60 mm duct
	Flexible pipe 90 deg bend	50 mm	Additional to length rating	3.2?
26	Outlet grille with connector	50 mm	Rotatable	1.3
27	Connecting socket	50 mm		0
28	Grille (Inlet & Outlet)	50 mm		?
29	Silencer	75 mm		1
30	Connector	75 mm		?
31	Heater outlet hood	75 mm		0


**	Smaller ducting ratings change	75 to 60	[ 75 mm rating x 2.44 ]
**	Larger ducting ratings change	75 to 90	[ 75 mm rating x 0.48 ]
**	Larger ducting ratings change	75 to 100	[ 75 mm rating x 0.32 ]

D1LCC with 75 mm diameter outlet hood (Heater rating 15)

Figures in blue show different ratings from older manuals, also any ratings that look suspect.

At this time I have no idea which of these are correct, hopefully they will be sorted out later.

Where the difference is small I have chosen a single value shown in blue.

? Best guess or rating figure not known, treat as very tentative.

**Eberspacher heater duct rating is for ducting the same diameter as the heater outlet hood.

In practical installations the duct size may be changed anywhere along its length.

The table lists the equivalent ratings just for the different sized pipe.

The value for other items can be calculated by multiplying by the figures at the bottom of the table.

[ ] Figures within square brackets are from my own calculations, not from Eberspachers manuals.

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Ducting Ratings - Airtronic D5 D1LCC

Airtronic D5 ducting ratings

D1LCC ducting ratings

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