Neither grid heaters had airflow through them during testing. It is possible air flow is required, but the Cummins grid heater didn't deform. The element on the Cummins grid heater is a bit larger. If the Yanmar grid heater requires airflow, it won't work for my needs.

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2006 CRD Sport
GDE FT ECO tune, GDE TCM ECO tune, ARP studs, HDS-001 203F T-Stat, 3.7L nylon fan & Hayden 2905 clutch, Carter P76148M in-tank pump, Racor 245R122 filter head & 2 micron R25S fuel filter, Provent 200, Samcos, Fumoto F-102, Litens 920834A de-coupler, PML rear diff cover, OEM trans pan with welded in bung, JBA UCAs, full skids.