DVS 30-2 installation instructions Vent Clearances, 13369-1-0203, Page

VENT CLEARANCES

Figure 27

A = *Clearance above grade, veranda, porch, deck or balcony [*12 inches (30cm) minimum]

B = clearance to window or door that may be opened [*12 inches (30cm) minimum for appliances < 100,000 Btuh (30kW)

36 inches (90cm) minimum for appliances > 100,000 Btuh (30kW)]

C = clearance to permanently closed window [minimum 12 inches (30cm) recommended to prevent condensation on window]

D = vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 18 inches (46 cm) from the top of the terminal

E= clearance to unventilated soffit [12 inches 30cm) minimum]

F= clearance to outside corner [12 inches (30cm) minimum]

G= clearance to inside corner [9 inches (22.5cm) minimum]

H= *not to be installed above a meter/regulator assembly within 3 feet (90cm) horizontally from the center-line of the regulator

I= clearance to service regulator vent outlet [*6 feet (1.8m) minimum]

J= clearance to non-mechanical air supply inlet to building or

the combustion air inlet to any other appliance [*12 inches (30cm) minimum for appliances ≤ 100,000 Btuh (30 kW)

36 inches (90cm) minimum for appliances > 100,000 Btuh (30kW)]

K = clearance to a mechanical air supply inlet [* 6 feet (1.8m) minimum]

L = †clearance above paved sidewalk or a paved driveway located on public property [*7 feet (2.1m) minimum]

M = clearance under veranda, porch, deck, or balcony [*12 inches (30cm) minimum ¥]

†a vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings*

¥only permitted if veranda, porch, deck, or balcony, is fully open on a minimum of 2 sides beneath the floor*

*as specified in CGA B149 Installations Codes or ANSI Z223.1. Note: Local Codes or Regulations may require different clearances.

13369-1-0203 Page 17