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OMNI by EconoHeat
2. This is a high efficiency boiler which operates with a low stack temperature which may be subject
to condensation in a cool or improperly designed chimney. Accordingly, the right vent or liner is
very important.
• Masonry chimney with three walls exposed to outdoors may require the use of a 316 stainless
steel liner.
• Masonry chimney with all inside walls—use a tile liner.
3. Breaching
• See Table 1 for minimum recommended breaching and chimney sizes.
• Keep run boiler to chimney as short as possible.
• Use as few elbows as possible.
• Slope upward towards chimney at not less than 1/4” per foot.
• Use a sealed-in thimble for the chimney connection.
• Connect together all sections and fittings with sheet metal screws and seal with silicone sealant.
4. When more than one appliance is connected to the same chimney, the chimney’s internal cross-
sectional area must be at a minimum equal to the area of the largest vent plus 50% of the area of
each additional vent.
5. Clearances—vent pipe between boiler and chimney must be a minimum of 6” from any
combustible material.
6. An oil-fired unit shall be connected to a flue having sufficient draft at all times, to assure safe
proper operation of the unit.
SIDE-WALL VENTING---IMPORTANT NOTE
Two problems arise when side wall venting any oil appliance;
1. There can be an accelerated rate at which soot builds up on the cad-cell, spinner, etc.
2. There is the potential for severe soot damage to the side of the structure in the event that
the boiler operates at a high smoke level. This can happen for many reasons, some of
which are out of the control of both the installer and appliance manufacturer.
EconoHeat recommends the use of a chimney to vent our residential oil boilers. If a power
venter must be used, it is the responsibility of the installer and power vent manufacturer to
“engineer” the power vent system.
ECONOHEAT WILL ASSUME NO RESPONSIBILITY FOR SOOT DAMAGE TO SIDING FROM A
POWER VENTED OIL BOILER. THIS APPLIES REGARDLESS OF THE CAUSE OF THE SOOTING.
