Denso, a manufacturer of automobile parts, has begun testing industrial heat pump air conditioners using biodiesel fuel at its headquarters in Kariya, in the Aichi Prefecture of Japan.
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(The success of the biodiesel fuel industry relies heavily on biodiesel testing, not only at the production level but at the consumer level, where degraded fuel may cause engine failures. Fleet Biodiesel's family of inexpensive biodiesel test kits is just a click away on the internet)