Fig. 3: 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 height

H

*

15 ft above the me-

tended above meter/regulator assembly

 

 

ter/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/CGA-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

TTPermitted 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 B: Vent/Air Inlet Termination Clearances

6

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Raypak 400/401, 260/261, 181/182, 330/331 manual Table B Vent/Air Inlet Termination Clearances
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330/331, 400/401, 181/182, 260/261 specifications

Raypak is a leading manufacturer in the pool and spa heating industry, known for its innovative and tech-savvy products. Among its offerings, the Raypak 260/261, 181/182, 400/401, and 330/331 series of heaters stand out due to their advanced features and characteristics.

The Raypak 260/261 series is designed specifically for residential and commercial pools. One of its main features is its digital control system, which ensures precise temperature settings and improved energy efficiency. With a maximum output of 260,000 BTUs, this series is perfect for heating larger pools, providing quick warm-up times and consistent heat levels, making swimming enjoyable even in cooler months. The 260/261 series also incorporates a unique low NOx design for environmentally friendly operation, adhering to strict emissions standards.

Next in line, the Raypak 181/182 series is known for its compactness and efficiency. With an output of 180,000 BTUs, this heater is perfect for smaller residential pools and spas. It features a bronze header design which resists corrosion, enhancing its longevity. Additionally, the direct spark ignition system contributes to reliability and ease of use, ensuring a quick startup without the need for a pilot light.

The Raypak 400/401 series caters to high-demand scenarios where quick heating is crucial. With an impressive heating capacity of up to 400,000 BTUs, it is designed for commercial applications, such as hotels and water parks, as well as large residential installations. This series is equipped with advanced digital control technologies, allowing for easy monitoring and adjustment of settings. The built-in stainless steel burner, combined with a robust heat exchanger design, enables efficient thermal performance and extended service life.

Lastly, the Raypak 330/331 series provides a well-balanced option for those seeking power and efficiency. With heating outputs of 330,000 BTUs, this series combines the latest in heat exchanger technology with a user-friendly interface. It also features Raypak’s signature low NOx emissions technology, making it suitable for compliance with regional air quality regulations.

In summary, Raypak's various heater series, including the 260/261, 181/182, 400/401, and 330/331, offer a diverse selection of features tailored for different heating needs. With a strong emphasis on performance, efficiency, and environmental responsibility, Raypak continues to be a dominant player in the pool and spa heating industry.
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