VERTICAL VENT FIGURES/TABLES

Note: Secure Vent (rigid vent pipe) is shown in the figures; Secure Flex (flexible vent pipe) may also be used.

Note: It is very important that the horizontal/ inclined run be maintained in a straight (no dips) and recommended to be in a slightly elevated plane, in a direction away from the fireplace of 1/4" rise per foot (20 mm per meter) which is ideal, though rise per foot run ratios that are smaller are acceptable all the way down to at or near level.

Note: SV4.5VF (Secure Vent), SF4.5VF (Secure Flex) firestop/spacer must be used anytime vent pipe passes through a combustible floor or ceiling. SV4.5HF (Secure Vent), SF4.5HF (Se- cure Flex)firestop/spacer must be used anytime vent pipe passes through a combustible wall.

Note: Two 45 degree elbows may be used in place of one 90 degree elbow. The same rise to run ratios, as shown in the venting figures for 90 elbows, must be followed if 45 degree elbows are used.

 

TABLE A

 

 

H Maximum

V Minimum

*Ceiling

feet

(meters)

feet

(meters)

Firestop/Spacer

(SV4.5VF)

2

(0.610)

1

(0.305)

 

4

(1.219)

2

(0.610)

 

6

(1.829)

3

(0.914)

 

8

(2.438)

4

(1.219)

V

V + H = 40 feet (12.2 meters) Max.

 

 

H = 8 feet (2.4 meters) Max.

 

 

Ratio V to H ratio is 1:2

 

Example: If 8 feet of (H) horizontal

 

vent run is needed, then 4 feet mini-

 

mum (V) vertical vent will be required.

H

This table shows a 1 (V) to 2 (H) ratio.

*When using Secure Flex,

use Firestop/Spacer

For every 1 foot of (V) vertical, you are

SF4.5VF

allowed 2 feet of (H) horizontal run, up to a maximum horizontal run of 8 feet.

Figure 27 - Rear Vent - ONE 90 DEGREE ELBOW

Note: An elbow is acceptable as 1 foot of vertical rise, except where an elbow is the only vertical component in the system. (See Figure 35 on page 18 ).

40 feet

 

H

 

*Ceiling

 

Firestop/Spacer

 

(SV4.5VF)

 

**Wall

 

Firestop/Spacer

V1

(SV4.5HF)

 

TABLE B

H Maximum

V Minimum

feet

(meters)

feet

(meters)

5

(1.524)

Elbow Only

5

(1.524)

1

(0.305)

10

(3.048)

2

(0.610)

15

(4.572)

3

(0.914)

20

(6.096)

4

(1.219)

V + V1 + H = 40 feet (12.2 m) Max.

H = 20 feet (6.096 meters) Max.

*Ceiling(12.2 meters)

Firestop/SpacerMaximum (SV4.5VF)

V

Example: If 20 feet of (H) horizontal vent run is needed, then 4 feet mini- mum of (V) vertical vent will be required.

*When using Secure Flex, use Firestop/Spacer SF4.5VF

A Vent Restrictor, as shown in Figure 14 on Page 10, must be used in this application.

*When using Secure Flex, use Firestop/Spacer SF4.5VF

**When using Secure Flex, use Firestop/Spacer SF4.5HF

Figure 28 - Top Vent - TWO 90 DEGREE ELBOWS

This table shows a 1 (V) to 5 (H) ratio. For every 1 foot of (V) vertical, you are allowed 5 feet of (H) hori- zontal run, up to a maximum hori- zontal run of 20 feet.

An elbow is acceptable as 1 foot of vertical rise except where an elbow is the only vertical component in the system. See Figure 35.

14

Figure 26 - Top Vent - STRAIGHT

WARNING: UNDER NO CIRCUMSTANCES MAY SEPARATE SECTIONS

OF CONCENTRIC FLEXIBLE VENT PIPE BE JOINED TOGETHER.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Page 13 Page 15
Page 14
Image 14
Lennox Hearth MPD-35 Series, MPD-45 Series, MPD-40 Series Vertical Vent FIGURES/TABLES, Table a, Table B, Feet
Page 13 Page 15

MPD-35 Series, MPD-45 Series, MPD-33 Series, MPD-40 Series specifications

The Lennox Hearth MPD-33, MPD-40, MPD-45, and MPD-35 Series are sophisticated and innovative products designed for both aesthetic appeal and functional heating efficiency. These multi-sided gas fireplaces are engineered to bring warmth and style to any space, making them a popular choice for homeowners looking to enhance their living environment.

One of the standout features of the MPD Series is their versatile design. Each model is available in different sizes with stylish options, catering to various room dimensions and decor styles. The MPD-33, MPD-40, and MPD-45 models provide flexibility in installation, while the MPD-35 offers extra depth for a more pronounced fire presence, making them suitable for both contemporary and traditional interiors.

A key characteristic of the Lennox Hearth MPD Series is its high-efficiency operation. These fireplaces are designed to maximize heat output while minimizing fuel consumption, resulting in lower energy bills. The innovative burner system produces a realistic flame effect that can be adjusted to create the perfect ambiance for any occasion. The use of advanced technology ensures that the heat generated is evenly distributed, enhancing overall comfort.

Safety is paramount in the design of the MPD Series. Each model is equipped with a state-of-the-art safety shut-off system that activates if the flame goes out, ensuring peace of mind for users. Additionally, the glass front not only provides a clear view of the flames but is designed to stay cool to the touch, making it safe for families with children and pets.

The efficiency of these models is further complemented by an optional remote control feature, allowing users to adjust the flame height and thermostat settings with ease. The MPD Series is also compatible with smart home systems, providing users with added convenience.

Overall, the Lennox Hearth MPD-33, MPD-40, MPD-45, and MPD-35 Series exemplify the perfect combination of efficiency, safety, and design. Their ability to blend function with visual appeal makes them an ideal choice for creating a cozy atmosphere in any room, from living areas to bedrooms. These fireplaces stand as a testament to Lennox's commitment to quality and innovation in home heating solutions. With advanced technologies and a focus on user comfort, the MPD Series is designed to meet the needs of modern homeowners seeking reliable and stylish heating options.
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