Has anyone tried those plug-in space heaters that use the electricity to heat up the fast heating yet heat-retaining liquid (silicon?) in the copper tubes then shuts off the electricity. I know they're (self) touted as energy savers but wondered if anyone knows for sure. Might be an option? In theory I can see how it would be more efficient than straight electric baseboard heat because of the liquid heat sink aspect.

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1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)