I work on oil furnaces for a living and in my area the most common and easiest to work on are Beckett burners.
Nordyne
The oil that is burned by furnaces is mostly #1 or #2 fuel oil
Golgi apparatus
There are many companies that manufacture waste oil furnaces. One company is Tervita. They are a very well regarded company and have very high ratings.
There is a Anchorage Recycling Center. Used oil can be used as fuel for furnaces and Boilers.
There are many places that sell oil furnaces in Timmins, Ontario. An example of a website that sells oil furnaces is from Beaton Enterprise. To contact them, a phone number listed is 705-264-0165.
With a special transformer that is stepped up to 10,000 volts
Goodman Manufacturing Inc. makes their own heaters. They manufacture gas furnaces, electric furnaces and heat pumps for residential and lite commercial.
Carrier sells a few different styles of furnaces. They sell split systems, Hybrid Heat, duct less split systems and also packages systems. Carrier also sells air conditioning units.
On the Ruud home website, they have a large selection of furnaces available. The furnaces are available in either gas or oil, with all sizes to accomodate any size building.
International Comfort Products or ICP. Try www.icpusa.com.