Navien NHB-110 User Manual (English)

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68 Installing a Common Vent System

9.7 Exhaust Vent Termination Clearances (For Direct Vent)

Ref Description Canadian Direct Vent Installations U.S. Direct Vent Installations

Clearance above grade, veranda, porch, deck, or

balcony

12 in (30 cm) 12 in (30 cm)

B Clearance to window or door that may be opened 12 in (30 cm) 12 in (30 cm)

C Clearance to permanently closed window * *

Vertical clearance to ventilated soffit located

above the terminal within a horizontal distance of

2 feet (61 cm) from the center line of the terminal

E Clearance to unventilated soffit * *

F Clearance to outside corner * *

G Clearance to inside corner * *

Clearance to each side of center line extended

above meter/regulator assembly

3 ft (91 cm) within a height

15 ft above the meter/regulator

assembly

I Clearance to service regulator vent outlet 3 ft (91 cm) *

Clearance to nonmechanical air supply inlet to

building or the combustion air inlet to any other

appliance

36 in (91 cm) 12 in (30 cm)

K Clearance to a mechanical air supply inlet 6 ft (1.83 m)

3 ft (91 cm) above if within10

ft (3 m) horizontally

Clearance above paved sidewalk or paved

driveway located on public property

7 ft (2.13 m)† *

M Clearance under veranda, porch deck, or balcony 12 in (30 cm)‡ *

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

† A vent shall not terminate directly above a sidewalk or a paved driveway that is located between two single family dwellings, that serves both dwellings.

‡ Permitted only if the veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.

* Clearance in accordance with local installation codes and the requirements of the gas supplier.

Other manuals for Navien NHB-110

Service Manual147 pages

User's Information Manual27 pages

Quick Installation Guide4 pages

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Navien NHB-110 Specifications

General

Category	Boiler
Brand	Navien
Model	NHB-110
Maximum Input	110, 000 BTU/h
Efficiency	95% AFUE
Weight	75 lbs
Vent Type	Direct Vent
Fuel Type	Natural Gas or Propane
Heat Exchanger Material	Stainless Steel
Water Connection Size	3/4 inch
Gas Connection Size	3/4 inch
Vent Material	PVC, CPVC, Polypropylene
Vent Size	2 inch