A split level and a fairly warm year, doesn't seem like going through the attic should be the issue.   

In fact if the base dial is on high they can warm the respective rooms very quickly to the point it becomes too warm. 

Thanks all for the warm welcome, and sorry for the delayed response, I've been away from internet connection!  

Thank You for the warm welcomes and the tips.  

I have an upstairs unit in a duplex and my tenant just texted and said there is no hot water, she said it gets slightly warm but that's it, there is a separate water heater under the cabinet in the kitchen next to the bathroom, what could the problem possibly be?

Maybe, in order to get warm water to the sink or shower, the tenants in this building have to run water longer (than the other building)?  

Warm regards,Ariff M ! 

Thanks for the warm welcome!

She said she did want to stay there, and complained of a lack of central heating from the previous landlord and that her electric heaters "didn't work", I gave her three brand-new space heaters to keep her from warm until I closed.

Both examples could, at the end of the day, net out to zero, but that feeling of cash in my hand/account warms my heart a little bit more.