SALEM, Ohio (WKBN) — Viewers have called saying they’re out of propane and heat but are getting no answers from a local company — all losing or are low on heat during the coldest time of the year.

Germany's Fraunhofer ISE is leading a consortium of 20 companies from the heating and housing industries to optimize propane (R290) heat pump systems for existing multi-family homes. The LC R290 ...