Hydro-Smart HS120CON-LP, Installation Manual And Owner'S Manual

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-Exhaust vent (ABS, PVC, CPVC, or polypropylene vent)-
The micro-boiler can be vented with ABS, PVC, CPVC, or polypropylene (temperature rated up to at
least 149 °F). Vent mat erial certified to ULC S636 standards is recommended in the USA. In Canada,
plas tic ven ting mu s t be certified to ULC S636 standards.
• The maximum length of exhaust vent piping must not exceed 70 ft . (21.3 m) for 3” ven tin g, which
depends on the eleva tion where the micro-boiler is installed, and 100 ft. (30.5 m) for 4” ven ting
(deducting 5 ft . (1.5 m) for each elbow used in the ven ting system). Do not use more than 5
elbows. See the table below.
• When the horizontal vent run exceeds 5 ft . (1.5 m), support the vent run at 3 ft . (0.9 m) intervals
with overhead hangers.
Item Material United States Canada
Exhaust pipe and
Fi ttings
Schedule 40 PVC ANSI/ASTM D1785
ULC S636 Certified
Materials Only
PVC-DWV ANSI/ASTM D2665
Schedule 40 CPVC ANSI/ASTM F441
Schedule 40 ABS-DWV ANSI/ASTM D2661
Polypropylene UL-1738
Pipe Cement/Primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
ABS ANSI/ASTM D2235
NOTE: Do NOT Use Cellular Foam Core Pipe
*For each elbow added, deduct 5 ft. (1.5 m) from ma x. vent leng th.
For details on the vent c onnection, refer to p. 13 to 16.
No. of
Elbow
2" ven ting 3" ven ting 4" ven ting
Up to 3,000 ft Up to 3,000 ft Up to 6,000 ft Up to 10,100 ft Up to 10,100 ft
0 6.5 ft . (2.0 m) 70 ft . (21.3 m) 40 ft . (12.2 m) 25 ft . (7.6 m) 100 ft . (30.5 m)
1 1.5 ft . (0.5 m) 65 ft . (19.8 m) 35 ft . (10.7 m) 20 ft . (6.1 m) 95 ft . (29.0 m)
2 N/A 60 ft . (18.3 m) 30 ft . (9.1 m) 15 ft . (4.6 m) 90 ft . (27.4 m)
3 N/A 55 ft . (16.8 m) 25 ft . (7.6 m) 10 ft . (3.0 m) 85 ft . (25.9 m)
4 N/A 50 ft . (15.2 m) 20 ft . (6.1 m) 5 ft . (1.5 m) 80 ft . (24.4 m)
5 N/A 45 ft . (13.7 m) N/A N/A 75 ft . (22.9 m)
Excludes vent terminators, termina tion elbows, or rain caps.
Ma x. V erti cal or Horizontal (Total) Vent Lengh