NTI INSTALLATION MANUALS

Part 5 - Venting

In the Commonwealth of Massachusetts and as Required by State and Local Codes: • The vented gas fueled appliance shall not be installed so its combustion, ventilation, or dilution air is obtained from a bedroom or bathroom. • Signage: Whenever any through-the-wall (horizontal or sidewall) vent is installed less than seven feet above the nished grade, a metal or plastic identi cation plate shall be permanently mounted • DO NOT vent where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valve, or other equipment. terminations. Snow levels shall be determined as follows: a. The installation location may, by ordinance, designate how snow levels are calculated in that location; or b. In the absence of speci c ordinances, snow levels shall be calculated from the average monthly maximum depth of snow accumulation as indicated by the National Weather Service’s 10 year statistics for the installation location/geographical area. In addition: • Total length of vent piping shall not exceed the limits speci ed in this manual. • The vent piping for this direct vented appliance is approved for zero clearance to combustible construction. • The ue products coming from the exhaust vent will create a large plume when the heater is in operation. Avoid venting in areas that will a ect neighboring buildings or be considered objectionable. • DO NOT locate exhaust vent or intake pipe in a parking area where machinery may damage the pipe. • DO NOT vent near so t vents, crawl space vents, or other areas where condensate or vapor could create a nuisance or hazard or cause property damage.

to the exterior of the building at a minimum height of eight feet above grade directly in line with the exhaust vent terminal. The sign shall read, in print no less than 0.5 inches in size, “GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS”. • Marking of Exhaust Vent and Intake Pipe: Piping used for ventilation, make-up, or combustion air intake shall be labeled as follows: a. Throughout the entire developed length: i. Labels must be placed every ten feet for exposed/visible piping; or ii. Labels must be placed every three feet for concealed piping. b. At all changes of direction; c. On each side of a penetration through a partition, wall or ceiling; and d. The labels shall be black lettering that: i. Indicates that the piping is used for ventilation, make-up, or combustion air intake, and ii. The letters shall be sized equal to a minimum of the pipe diameter. However, for piping with a diameter exceeding two inches, said lettering does not need to be larger than two inches. The following table lists optional exhaust/intake terminations available from NTI:

Description

Stock Code

3” PVC Concentric Termination Kit

84634

3” PVC Low Pro le Termination Kit

84357

2” PVC Low Pro le Termination Kit

85062

Table 16 - Optional Vent Kits

Vent Option Availability Roof Wall

Vent Size

Supplier Part Number

Vent Material Compatibility

Description

Figure

2”

196984 (NTI p/n 85062)

36, 40

IPEX Low Pro le (Wall) 7

No

Yes

3”

196985 (NTI p/n 84357)

36, 40

2”

196125

37, 41, 48, 52

PVC/CPVC

IPEX Concentric (Wall/Roof) 4, 5, 6, 7

196116 (NTI p/n 84634)

37, 41, 48, 52

Yes

Yes

3”

196117

37, 41, 48, 52

Duravent Polypro® Concentric (Wall)

2 - 3”

2PPS-HK, 3PPS-HK

38, 42

No

Yes

Polypro® Polypropylene

Duravent Polypro® Concentric (Roof)

2 - 3”

2PPS-VK, 3PPS-VK

49, 53

Yes

No

InnoFlue® Flush Mount (Wall)

2 - 3” ISLPT0202, ISLPT0303

36, 40

No

Yes

InnoFlue® Polypropylene

InnoFlue® Concentric (Wall)

2 - 3”

ICRT2439, ICTC0224

38, 42

No

Yes

InnoFlue® Concentric (Roof)

2 - 3”

ICRT3539, ICTC0335

49, 53

Yes

No

Z-DENS® Concentric (Wall)

2 - 3”

2ZDHK2, 2ZDHK3

Not Shown

No

Yes

Z-DENS® Polypropylene

Z-DENS® Concentric (Roof)

2 - 3”

2ZDVK2, DZDVK3

Not Shown

Yes

No

NOTES: 1 Instructions included with termination kits contain detailed assembly and installation instructions. 2 Clearance requirements in this manual supersede those of the instructions included with the vent terminal. 3 Piping MUST be secured to the vent terminal during installation. 4 IPEX Concentric Terminal MUST be cemented together and to the vent pipes during installation. 5 Vent Screens provided with boiler may be used with the IPEX Concentric Vent Kits; otherwise use IPEX vent screens (2 in. vent screen p/n 196050; 3 in. vent screen p/n 196051 - each sold separately). 6 IPEX Low Pro le and Concentric kits (exluding p/n 197117) are constructed out of ULC-S636 approved PVC. Check with your local authority for the acceptance of PVC as a venting material prior to use. 7 IPEX Concentric kits can be shortened to t the requirements of the installation. See instructions included with the kit for more details.

Table 17 - Optional Vent Termination Kits

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