How this South Shore man stays warm with rotting wood chips

A Boutiliers Point, N.S.,man is staying warm this winter thanks to apile of rotting wood chips.

Franz Fraitzlhasbuilt a furnace on his property that supplies heat to atwo-storey steel workshop, but doesn't require a traditional fuel source. The yurt-like structureis filled with wood chipsthat decomposeand generateheat.

Fraitzl previously used a forced air, kerosene heater for heating, but it was expensive and came with another side effect.

"By the end of the week, I was all dizzy from the fumes," he told CBC'sMainstreet.

Now, he's traded his $600 monthlypower bill for a heat source that's essentially free, minus the roughly $1,000 it costtobuild.

Building thefurnace was relatively simple and inexpensive, he said,but it does require space and a line on wood chips.

He gets a load ofwood, usuallyfrom localhorticulturalists, "who are practically giving it away." He piles up the wood chips, douses themwithwater and runs about120 metresofpolyethylene tubing through the middle of the compost pile.

The tubing is full of water that warmsup as thewood pile naturally generates heat.

Fraitzl said the process can generate heat of up to 60 C.He thenuses a converted industrial furnace to blow the heat into hisworkshopusing materials that were donated to him.

"It's a one-time investment and other than maintaining it ... you never have to pay for it again," Fraitzl said. "And you get free heat out of it, some systems up to a year or longer."

He based his design on the work of Jean Pain from France who died almost four decades ago, but is largely credited with the methods still used today.

The projectallows Fraitzlto be self-sufficient for heating, which means he isn't worried about losing heat if the power goes out.

Because Fraitzl isonly working with wood chips, thefurnacedoesn't have the stench that usually comes with compost.

"Maybe a little bit of an earthy undertone, but that's all there is," he said.

Fraitzl, who's from Germany and moved to Nova Scotia in 2016, is an artist and special effects technician who's prone to building novel things.

Last year, his tractor-turned-ice-resurfacerwas a hit at the local rink.

The furnace project saves him money and keeps him warm, and the soil that's createdis then returned to the earth.

"I want to be part of the community, part of nature giving back," Fraitzl said. "We all have a negative footprint. It's just if I can reduce mine and make it as small as possible, I can say I did my part at the end."

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