Small, Cheap Oil Based Heater/Furnace/Boiler for Basement

[Aaron Montague]

BPers,

I am looking for an inexpensive way to use oil heat to make sure my pipes don't burst in the basement of a 4 family apartment building I own.

Perfect scenario:

1 heating source that connects directly to a standard oil tank and produces enough heat to keep a large and well insulated basement at about 55 degrees in Vermont winters.

Could any of you point me in the direction of such a heating source?