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Kozy space heater from Kroll

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article image Kroll Kozy

The Kozy from Kroll is suitable for heating any size area of up to about 300m2 and uses 2 litres of waste oil per hour on low and 3 litres per hour on high. Kroll’s Kozy comes with its own powerful blower fan. This means the Kozy is an effective space heater that will take the chill off the air throughout your building. There's no need to huddle around the heater to get warm and one does not have to put it into a central position.

Tucked away in the corner, or against a wall is ideal. One can expect a long trouble free life from the Kozy. The first ones installed back in 1982 are still going strong. Compared to other types of heaters, Kroll Kozy will pay for itself in just one or two winters.

It has been known for years that waste oils have a similar heating energy to conventional heating fuels. The trick was to get it to burn cleanly, safely and without pollution. Kroll has done it. This means heat in abundance with virtually no running cost. No special filtering is required. Kroll heaters run cleanly and efficiently on all engine oils ... sump oil, transmission fluid, gear oil or hydraulic oil. Use heaters just as it comes from the engine or transmission of any vehicle or machinery.

Installation is easy

The operator's manual explains the simple guidelines for erecting the stainless steel flue. A T piece is located at the lower end of the flue, which one can obtain locally off the shelf, or Kroll can supply everything one needs. It consists typically of about 4 metres of flue, with a hat on top.


The Kozy is not high tech. To start it, users have to pour a cup of kero or diesel into the cast iron pan which sits in the bottom of the Kozy, and light it with a match. After about ten minutes an internal thermostat automatically starts the oil pump and the blower fan. Waste oil is trickled into the hot pan, where it vapourises into a gas and burns cleanly. When user burn waste oil in a Kroll, there is no smoke or fumes.

The emissions are clean and have been tested by an EPA approved company, and are well within EPA requirements. The contaminants in waste oil such as carbon, dirt and detergents are broken down in the 750o C temperature of the furnace, to a dry crusty ash, which accumulates in the cast iron pan, and needs to be removed each day.

Kozy comes with two pans. At start-up, use the clean one. At a convenient time, clean yesterday's pan, ready for use tomorrow. The amount of ash one gets depends on the nature of the oil, e.g.: thick black oil from old diesel engines leaves more ash; transmission oils leave almost none.

A bit of water in the oil does not worry Kozy at all. Commonly, oil from petrol engine vehicles, or a combination of waste oils, gives lots of heat and minimal ash. One will spend about ten minutes a day looking after one’s Kroll Kozy.

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