EnergyLogic's 140H Waste Oil Heater — and the Oil It Cannot Buy

Verdict $11,799 against $4.09 an hour of displaced propane: break-even at 2,883 burner hours. Federal rule says the oil has to be oil your own shop generated.

Prices are US list prices at the time of publication. Shipping, duties and local taxes vary by country — check with the manufacturer before ordering.

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EIA prices U.S. residential propane at $2.674 a gallon and puts 91,452 BTU in that gallon. Heat bought as propane therefore costs $29.24 per million BTU.

EnergyLogic’s 140H burns a gallon of used motor oil an hour and rates that gallon at 140,000 BTU. Matching it with propane takes 1.53 gallons an hour — $4.09 — and the oil came out of a drain pan the shop already owns.

The complete system is $11,799, with a live Add to cart button and "availability":"http://schema.org/InStock" in the page’s own JSON-LD. Break-even is 2,883 of those hours.

The Machine

The 140H is a 92-inch horizontal steel furnace, 295 pounds, hung from the ceiling or bolted above its own tank. Oil is pulled six inches off the tank bottom, filtered, preheated and atomized with air from a compressor built into the unit. EnergyLogic publishes 140,000 BTU an hour, 1.0 gallon an hour of fuel, 1,000 cfm at a 100–120°F rise, a 6- or 8-inch flue, and coverage to 3,500 square feet — one to four service bays. It takes anything from No. 2 diesel to 90W gear oil, synthetics included.

The whole ladder sits on one storefront and every step reads InStock: the bundle kit without a tank at $9,899, this system with a 250-gallon single-wall tank at $11,799, the same furnace on a 500-gallon tank at $13,899, the 200H at $12,965, the 350H at $16,169. Underneath it, the EL 75H with a 10-gallon tank at $4,299 covers 1,750 square feet.

$1,900 separates the bundle kit from this one: the tank, its fittings and the filter — what a shop with a waste tank already standing does not buy twice.

The Numbers

That price is EIA’s week of March 30, the last of the heating season: the series runs October to March.

Every hour the burner runs, $4.09 of propane goes unbought. $11,799 divided by that is 2,883 hours — and because the machine drinks a gallon an hour, also 2,883 gallons of used oil, and 120 days of continuous fire. The 250-gallon tank in the price holds $1,023 of it at a time.

There is a second reading, fairer to a bare wall. Global Industrial stocks a Modine PDP150 propane unit heater at $2,629, 150,000 BTU in and 120,000 out. Buy that instead and the waste-oil machine costs $9,170 more, back in 2,241 hours rather than 2,883.

What Breaks

The fuel supply is your own drain pans, and that is federal law. 40 CFR 279.23 exempts on-site burning only where “the heater burns only used oil that the owner or operator generates or used oil received from household do-it-yourself used oil generators,” where the unit is designed for no more than 0.5 million BTU an hour, and where it vents to ambient air. The 140H at 140,000 sits well inside that ceiling. The barrel from the shop next door sits outside the rule.

So the calendar is set by volume, not by winter. A shop collecting 300 gallons a year needs 9.6 years to reach 2,883 gallons. One collecting 3,000 gets there in 0.96. Nobody but the owner can supply that figure, and it decides the purchase.

Used oil is not free. It is unpriced. A collector hauls it today, and depending on volume and market they charge for the trip or pay for the load. What that swing is worth on your invoice is DATA NOT AVAILABLE FROM SOURCE, and it comes off the $4.09 an hour, not off the machine.

2,883 hours is a floor, and two things push it out. EIA’s $2.674 is the residential weekly series, and a shop on a bulk commercial contract pays less: EIA publishes no reachable commercial propane price, so that gap is DATA NOT AVAILABLE FROM SOURCE. And only Modine publishes an efficiency — 150,000 BTU in, 120,000 out — while EnergyLogic gives no output rating at all, so the arithmetic above is fuel energy against fuel energy. Both assumptions are generous to the machine.

Service lands every 1,000 heating hours. EnergyLogic puts the interval there and sells the 140H/200H kit at $148. Two fall before break-even — $296 that appears on no price page — and the ash comes out with them.

It needs a ceiling and a chimney. EnergyLogic asks a minimum 12-foot ceiling for a tank-mounted heater — wall-mount brackets are offered for lower buildings — and the flue has to reach outside air. Like the kiln that arrives without the room it dries in, the price buys the machine, not the building. What the blower and compressor draw is DATA NOT AVAILABLE FROM SOURCE.

Who Should Buy This

The shop that already fills a waste tank. Fleet bays, a dealership service lane, a farm shop servicing its own equipment. The oil arrives whether or not the furnace does, which is the only condition under which $4.09 an hour is money.

The building already heated on bought fuel. This is the same shop where the tractor stands idle from December on — heated space, 220 volts, a roof somebody already pays to warm. Displacing a propane bill is the transaction, and an unheated barn has no bill to displace.

Four bays, not two. Below 1,750 square feet the EL 75H is the machine, and $7,500 stays in the account.

Not for: the two-bay shop collecting 200 gallons a year, which outlasts the warranty waiting. Not for a 10-foot building without the wall bracket. Not for anyone who would have to source oil to keep it lit, the exact purchase the exemption forbids. And not for a building nobody heats today: with nothing displaced, there is nothing to divide $11,799 into.

The Stack

No affiliate links in this issue. When a link earns us a commission, we always say so. Verdicts are never for sale.

Four bays and a tank that fills every winter: the 140H Complete System at $11,799 — furnace, flue kit, 250-gallon tank and filter. With a tank already standing, the bundle kit at $9,899. Under 1,750 square feet, the EL 75H at $4,299.

Budget the service with it: the 140H/200H maintenance kit is $148 every 1,000 hours — $0.15 an hour before anything goes wrong.

And if the oil is not there, propane is no defeat: Modine’s PDP150 at $2,629 heats the same bay for $9,170 less.

A shop collecting 300 gallons a year waits most of a decade for this. A shop collecting 3,000 is heating on nothing by the second winter. That number is in your drums, not on our page.

Produced under the editorial standards of editor Nicolás Galindez. Spotted an error? [email protected] — the editor reads every reply.