Question

if the vent length on a gas - fired water heater is too long
the cost of the system is too high
combustible clearances have to be increased
there is a possibility of poor drafting and spillage of combustion products
it must have more than two elbows
it may require supports at more frequent intervals
question 36
gas - fired water heaters
can typically be installed on combustible floors and including carpeting
usually require 36 inches combustible clearance around and above the water heater
do not have any insulation in the tank walls
should not be installed in bedrooms or bedroom closets
should be installed two inches off the floor in garages to avoid rusted feet

Explanation:

For the first question, a long vent on a gas - fired water heater can cause poor drafting and spillage of combustion products due to increased resistance in the venting system. For the second question, gas - fired water heaters should not be installed in bedrooms or bedroom closets due to the risk of carbon monoxide and other combustion product leaks.

Answer:

First question: there is a possibility of poor drafting and spillage of combustion products
Second question: should not be installed in bedrooms or bedroom closets