On product description:
Key Features and Benefits
Top discharge provides powerful convection airflow
From User Manual:
5. To prevent a possible fire, do not block the air
intakes or exhaust in any manner.
Single handle faucets can allow water to flow from the hot side to the cold if turned on at all. Not sure if some of them will allow the flow when turned full off. Fix would be to turn off the hot water shutoff valve under your sinks. If the flow is coming thru a bathtub or shower valve, that would be more difficult. Might be easiest to simply remove the ...