When installing a condensing wall-hung boiler, the chimney must face upwards, which is different from ordinary boilers.

The design of the condensing furnace is corrosion-resistant, and it doesn't matter if the rain falls in, it will be discharged from the condensing drain pipe of the furnace. If there is water in the stove.

1. Maybe the drain pipe is thin and needs to be replaced.

2. It may be that the water is not drained around the chimney hole, so it needs to be refilled.