Question

the required clearance from combustibles for a single - wall vent connector on a gas water heater is
1 inch
2 inches
4 inches
6 inches
9 inches
question 20
1 pts
which of the following statements about combination domestic hot water and space heating systems is false?
these cannot be used with a radiant piping heat distribution system
potable water is passed through a coil in an air handler with a duct system
electric water heaters are not used in this application typically
the water heater has to be larger and/or have a faster recovery rate than conventional water heaters
the pump may operate even during non - heating seasons to prevent stagnant water accumulations

Explanation:

For the first question, building - code and safety standards typically require a 6 - inch clearance from combustibles for a single - wall vent connector on a gas water heater. For the second question, combination domestic hot water and space heating systems can be used with a radiant piping heat distribution system, so the statement that they cannot be used is false.

Answer:

First question: D. 6 inches
Second question: A. these cannot be used with a radiant piping heat distribution system