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Installing the water heater, Horizontal vent terminal location, Additional considerations – Paloma 7.4 Series Residential Indoor Gas User Manual

Page 14

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14

Installing the water heater.

Horizontal Vent Terminal Location

The location of the vent terminal depends on the following

minimum clearances and considerations (see illustration):

Twelve (12) inches above grade level and above normal

snow levels.
Four (4) feet below, or four (4) feet horizontally from any

door, window, soffit, under eave vent or gravity air inlet to

the building or other appliances, or from gas or electric

meters. Do not locate vent above walkways, doors,

windows, air inlets, gas or electric meters or other

equipment.
Ten (10) feet from any forced air inlet to the building.

Any fresh or make-up air inlet such as for a dryer or

furnace area is considered to be a forced air inlet.
Eighteen (18) inches from an inside corner formed by two

exterior walls.

4'

4'

Soffit vents

18"

4'

4'

4'

18"

Electric

meter

Inside

corner

10'

Fresh

air

intake

12" (Above grade/snow level)

window or vent

Additional Considerations

Do Not install vent terminal under any patio or deck.
To help prevent moisture from freezing on walls and under

eaves, do not locate vent terminal on the side of a building

with prevailing winter winds.

Do Not terminate vent pipe directly on brick or masonry

surfaces. Use a rust-resistant sheet metal backing plate

(2 x 2 feet) behind vent. (See illustration.)

Do Not locate vent terminal too close to shrubbery, as flue

gasses may damage them.

Caulk all cracks, seams and joints within six (6) feet of vent

terminal.

All painted surfaces should be primed to lessen the chance of

physical damage. Painted surfaces will require maintenance.

Insulate vent pipe exposed to cold conditions (attics, crawl

spaces, etc.) with inflammable material to help prevent

moisture from accumulating in vent pipe.

Do Not extend exposed vent pipe outside of building.

If soffit vent is too
close, block off and
install new vent at
another location

Inside
corner

Caulk

Caulk

Caulk

6' caulk
zone or
to edge of
window etc., starting
within

6'

Rising moisture will
collect under eaves

4'

6'

6' caulk
zone

2 ft. sq. sheet metal plate on
brick or masonary surface

RTV silicone caulk

WARNING

:

Moisture in the flue gas will condense as it

leaves the vent terminal. In cold weather this condensate can

freeze on the exterior wall, under the eaves and on

surrounding objects. Some discoloration to the exterior of

the building is to be expected. However, improper location

or installation can result in severe damage to the structure

or exterior finish of the building