Heating Elements for the soil
On Tue, 30 Dec 2008 11:35:43 GMT, Larry Kraus wrote:
Electrical resistance heaters by their very nature are 100% efficient.
Insulation under and around your planter will reduce your energy cost
regardless of the source.
No, they're about 30% efficient. You need to include the power station in the
equation :-|
Mark Rand
RTFM
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