▁students ▁and ▁incorpor ates ▁many ▁features ▁for ▁energy ▁efficiency : ▁Sol ar ▁pan els ▁generate ▁ 1 0   k W ▁of ▁electric ity , ▁and ▁water ▁is ▁he ated ▁through ▁solar ▁collect ors ▁for ▁domestic ▁use . ▁D ual - flush ▁to ile ts ▁con serve ▁water . ▁Windows ▁and ▁over hang s ▁are ▁position ed ▁to ▁provide ▁ambient ▁light ing , ▁and ▁windows ▁open ▁to ▁provide ▁natural ▁vent ilation . ▁Struct ural ▁ins ulated ▁pan els ▁were ▁used ▁to ▁lower ▁H V AC ▁costs ▁and ▁short en ▁construction ▁times . ▁Rain water ▁from ▁the ▁roof ▁is ▁collected ▁in ▁under ground ▁bar rel s ▁for ▁use ▁in ▁ir rig ation . ▁C ool ing ▁and ▁he ating ▁util ize ▁energy - s aving ▁ge oth erm al ▁radi ant ▁floor ▁systems . ▁ ▁See ▁also ▁List ▁of ▁par ks ▁in ▁Mid land ▁County , ▁Michigan ▁ ▁References ▁ ▁External ▁links ▁ ▁C NC ▁Ann ual ▁Report ▁ 2 0 1 2 ▁ ▁Category : M id land , ▁Michigan ▁Category : Import ant ▁Bird ▁Are as ▁of ▁Michigan ▁Category : Ar bor eta ▁in ▁Michigan ▁Category : Pro te cted ▁areas ▁of ▁Mid land ▁County , ▁Michigan ▁Category : E ducation ▁in ▁Mid land ▁County , ▁Michigan ▁Category : Build ings ▁and ▁structures ▁in ▁Mid land ▁County , ▁Michigan ▁Category : N ature ▁cent ers ▁in ▁Michigan ▁Category : T our ist ▁attra ctions ▁in ▁Mid land ▁County , ▁Michigan ▁Category : 1 9 6 6 ▁establish ments ▁in ▁Michigan ▁Category :