Hello guys. I live in the southern europe and the temps are really getting high these days.Im growing some autos and some photoperiodics(week 3.5) in a 1x1x2m grow tent and by now i can leave the tent's zip door half open and get away with temps that fluctuate between 27-29.5C. But in the near future that the weather will get even hotter i going to have some problems, so what do you recommend? I can use a stronger exhaust fan but the problem is i cant send the hot air outside cause tent is in a concrete room where its not logic to make a hole in the concrete wall or drill the iron shutter.Is it possible to build a diy ac cooler with ice or something ? or should i buy a portble air conditioner(that it's really costy and consumes a lot of electric energy where here in europe aint cheap)?Also i must point out that in the future when the plats will start flower and get really smelly it whould be difficult to leave the tent door open cause it will be really smelly...