BOULDER, Colo., Feb. 21, 2017 /Weed Wire/ — Surna Inc. (OTCQB: SRNA) converted $2.76 million of its 10% convertible promissory notes, consisting of approximately $2.28 million in principal and $480,000 of accrued interest, into approximately 18 million shares of newly issued common stock and cash payments of less than $200,000.