Water Heater Vent Height Above Roof

The chimney above the roof is in very poor condition.

Water heater vent height above roof.

It does not appear to be as high as the peak of the house. The gas heater vents out the side of the house so the water heater is the only item venting through the chimney. Could this be the reason the water heater goes out on windy days and what can i do to correct the problem. When installing a gas water heater building codes requires that they be ventilated out of the room through the attic and out through the roof.

Illustrations of proper gas fired water heater venting using type b double wall vent pipe through a roof above or through a chimney below include details for the flue vent connector such as the requirement of a minimum vent connector upwards slope of 1 4 per foot of horizontal run. One on the ceiling above the water heater and one that is the distance from the attic floor to the roof. Water heater replacement guideline height every attic roof mezzanine or platform more than 8 feet above the ground or floor level shall be made accessible by a stairway or ladder the vent and the water heater must maintain clearance from combustible materials such as wall framing or roofing. My vent pipe extends about 2 feet above roof and has a round cap on it.

The ubbink rolux concentric vent system is considered part of the direct vent tankless water heater.