Fig. 7: Minimum Clearances from Vent/Air Inlet Terminations – Indoor and Outdoor Installations

 

 

U.S. Installations1

Canadian Installations2

A

Clearance above grade, veranda, porch,

1 ft (30 cm)

1 ft (30 cm)

deck, or balcony

 

 

 

 

Clearance to window or door that may be

4 ft (1.2m) below or to side

 

B

of opening; 1 foot (30 cm)

3 ft (91 cm)

opened

 

above opening

 

 

 

 

C

Clearance to permanently closed window

*

*

 

Vertical clearance to ventilated soffit located

 

 

D

above the terminal within a horizontal dis-

5 ft (1.5m)

*

tance of 2 ft (61cm) from the centerline of the

 

 

 

 

terminal

 

 

E

Clearance to unventilated soffit

*

*

F

Clearance to outside corner

*

*

G

Clearance to inside corner

6 ft (1.83m)

*

 

Clearance to each side of center line ex-

 

3 ft (91 cm) within a

H

*

height 15 ft above the

tended above meter/regulator assembly

 

 

meter/regulator assembly

 

 

 

 

 

 

 

I

Clearance to service regulator vent outlet

*

6 ft (1.83m)

 

Clearance to non-mechanical air supply inlet

4 ft (1.2m) below or to side

 

J

to building or the combustion air inlet to any

of opening; 1 ft (30 cm)

3 ft (91 cm)

 

other appliance

above opening

 

K

Clearance to mechanical air supply inlet

3 ft (91 cm) above if within

6 ft (1.83m)

10 ft (3m) horizontally

 

 

 

L

Clearance above paved sidewalk or paved

7 ft (2.13m)

7 ft (2.13m) t

driveway located on public property

 

 

 

M

Clearance under veranda, porch, deck or

*

12 in. (30 cm) TT

balcony

 

 

 

1In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code

2In accordance with the current CAN/CSA-B149 Installation Codes

t Vent terminal shall not terminate directly above sidewalk or paved driveway located between 2 single family dwellings that serves both dwellings

TT Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor and top of terminal and underside of veranda, porch, deck or balcony is greater than 1 ft (30cm)

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

Table G: Vent/Air Inlet Termination Clearances

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Raypak 302B, 902B manual Ft 91 cm within a
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302B, 902B specifications

Raypak is a prominent name in the heating industry, particularly known for its advanced technology and robust design in residential and commercial heating solutions. Two of their notable models, the Raypak 302B and 402B, exemplify innovation and efficiency in hydronic heating systems, designed to meet diverse needs while ensuring optimal performance.

The Raypak 302B and 402B are high-efficiency boilers that utilize gas-fueled systems. The 302B model has a heating capacity of 302,000 BTU/h, while the 402B boasts a maximum capacity of 402,000 BTU/h. This range of heating output makes these models suitable for a variety of applications, from residential heating needs to larger commercial spaces that require a reliable heat source.

One of the standout features of the Raypak 302B and 402B is their use of fire-tube heat exchanger technology. This design promotes efficient heat transfer and allows for lower emissions, thus minimizing the environmental impact. The fire-tube design also contributes to a longer lifespan and reduced maintenance costs, making these boilers a cost-effective solution over time.

Equipped with advanced control systems, the Raypak 302B and 402B ensure precise temperature regulation and improved energy usage. The digital display provides real-time feedback and diagnostics, enhancing user experience and simplifying troubleshooting. These models are also compatible with various building management systems, providing users with versatility in integration to optimize building performance.

In addition to their technological advancements, these boilers are designed with user safety and convenience in mind. They include features such as built-in safety controls, easy access for service and maintenance, and a compact footprint to fit into tight spaces. Their robust construction ensures durability, which is crucial for systems that operate under high demand.

Moreover, both models have been engineered to succeed in various climates, making them reliable choices for users in diverse geographical locations. With their energy-efficient operation, reliable performance, and advanced features, the Raypak 302B and 402B embody quality and innovation in the heating market, ensuring comfortable environments while lowering energy costs and environmental footprints.
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