Hello I know nothing about water heaters. I want wifi control of my hot water heater. its in the attic and i work away from home. its not efficient or fun to go into the attic to turn the mechanical down or up when i leave or come home. and id like to be able to add maybe the Rheem wifi control unit to a electric unit on my current unit. this needs to be a cost effective method. purchasing a new water heater to replace the one i have that currently works is not worth it when control of the gas going to my water heater will only save me 10-20 bucks a month on gas. i work away from home and my gas bills when away are 20-27$ total. however if it IS possible to upgrade just the gas control valve unit , to an electric on that has the ability to add the Rheem wifi unit , for control via my smart phone i need to find this information. thank you in advance.