come thou long-awaited green house

ok, so...the long-awaited greenhouse is nearly done.....i say nearly, because now that i am working in it, i see the need to make improvements originally down-played by the builders....like an exhaust window with a temperature-gauged hinge.....yes, one can open up the doors when the temperature gets too high inside.....but i cannot do this from work.....i can see myself driving home at lunch on unseasonably warm days to open those doors....driving to and from work to check on a greenhouse is hardly sustainable food production....aside from the temperature issue...there is the lack of any opening big enough for an extension cord.....in the event we are sub-zero for a few days i might want to warm things up a tad.......heavy sigh....i am perusing the seed catalogs for varieties that winter-over well in hopes they will do as well in the greenhouse.....i have found an unused packet of rouge d'hiver lettuce that looks to be winterhardy...will plant these the next time i am home during daylight.....