The water heater thermometer that I got is giving about a 10 F swing.  I have a digital thermometer that gives a high and low and it is showing 93 to 102 ish.  The only other thermostat controls I can find with as low as a 1 F range do not go above 90F as they are for house heat/AC control.  So what have you all used ?
	
		
			
		
		
	
				
			
	