Something that needs proper thought, prior to purchase. Monitors do not take kindly to water in your kerosene fuel tank, water delivered by the fuel company - how nice of them. The fuel tank was new and the fuel was its first.
So, some reading for your pleasure and general info:
http://www.alsheating.com/MonitorHeater.htm
May be of interest, if seriously considering a purchase:
http://www.alsheating.com/MonitorHea...ntsRepairs.htm
Hope this helps...