not even in the same state
Power vented water heaters are usually factory installed kits.
There are two insulated heater elements that heat the water.
No, each must be vented seperately.
The difference between a mobile gas water heater and a standard gas water heater is that a MH unit will use an outside air intake for combustion. That is the most important difference.
There is no vent pipe on top of a hot water heater. Mobile home or not. You must be thinking of something else. The HW tank is only vented by a Pressure Relief Valve vented to the drain.
No, directly vents through to outside wall of building.
Because the water heater is downstairs, and the pipes are poorly-insulated.
THERE IS NO SUCH THING AS A HOT WATER HEATER.
ensure the exhaust fumes are properly vented
Thr R value of the water heater insulation will differ among various water heaters in various price ranges. As you can imagine a heater with 12 year warranty will be better insulated than a 5 year model.
Make sure you only heat what you needIf you have a water heater with a tank: make sure the tank is well insulated
The pilot setting will heat the water a few degrees. A gas water heater will have a thermal rating in BTU of 30,000 to 80,000. The pilot light by itself will have about 1,000 BTU. Operating overnight with no water movement and a well-insulated tank, you will observe a temperature rise but certainly not enough for clothes washing, dishwashers, or showers.