#1 It says special feature high efficiency stainless steel venting exhaust does it come with the venting exhaust?
This unit comes with the mounting screws and the manual. The vent kit and the plumbing hardware must be purchased separately.
#2 What is the suggested maximum elevation that it will work?
The maximum elevation is 2000 feet above sea level.
#3 Do you have a video for installing this this tankless water heater?
There is not a video showing how to install this unit. Marey GA24CSALP must be installed by a professional plumber or electrician to ensure safety and quality. Also, we recommend that the venting installation includes a length of 4ft of straight pipe from the top of the unit to the first bend (if there will be any bends).