Submittal Sheet

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to continuing engineering and technological advances |
BTC 742008301 E | 10.2014
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Engineering Submittal Sheet
C1050ES
Tankless Water Heater
Bosch Thermotechnology Corp.
Londonderry, NH • Ft. Lauderdale, FL
Required direct vent terminal clearances (twin pipe / concentric penetration)
Clearance Data
Item Description Value Canadian installations ¹
)
U.S. installations ²
)
A Clearance above grade, veranda, porch, deck or balcony Inch 12
12
B Clearance to window or door that may be opened Inch 36
12
C Clearance to permanently closed window Inch
**
D
Vertical clearance to ventilated soffi t located above the vent
terminator within a horizontal distance of 2 feet (61cm) from the
center line of the terminator
Inch
**
E Clearance to unventilated soffi t Inch
**
F Clearance to outside corner Inch
**
G Clearance to inside corner Inch
**
H
Clearance to each side of center line extended above meter/
regulator assembly
−
36 in. within a height 15
feet above meter/ regulator
assembly
*
I Clearance to service regulator vent outlet Inch 36
*
J
Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other application
Inch 36
*
K Clearance to mechanical air supply inlet Inch 72
36 in. above if within 10 feet
horizontally
L
Clearance above paved sidewalk or paved driveway located on
public property
Inch
84
³
)
*
M
Clearance under veranda, porch deck or balcony
Inch
12
⁴
)
*
1) In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code
2) In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code
3) A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
4) Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the fl oor.
* For clearances not specifi ed in ANSI Z223.1 / NFPA 54 or CSA-B149.1, one of the following shall be indicated:
a) A minimum clearance value determined by testing in accordance with section 2.20, or;
b) A reference to the following footnote:
“Clearance in accordance with local installation codes and the requirements of the gas supplier.”
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