Can I vent 2 gas appliances through the same roof vent? I have a gas water heater with a straight vent going approximately 12 feet up through the roof, located in my garage, and I want to add a ceiling mounted Modine Hanging Heater, with a gravity vented propeller.
Can I cut splice a tee into the water heater vent and use the same roof vent for both ??
If so will a 4" vent be enough for both units??
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