Jon Greene, 68, had set up a propaneci heater inside one of the barns at "The Oaks at Denville," when it malfunctioned and set the structure on fire around 3:05 a.m. Tuesday, local police said.
Firefighters from multiple agencies responded to the Pocono Road facility to knock down the 2-alarm blaze.
Greene was subsequently charged with criminal trespass and released on his own recognizance, authorities said.
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