new video
hot off the press!  
    more about rocket
mass heaters here.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic

need help with this ventilation idea  RSS feed

 
Gilbert Fritz
Posts: 1302
Location: Denver, CO
22
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I have a hoop house in Denver, CO. With our intense sun, it very quickly overheats, since there is no ventilation mechanism yet. I have bought an automatic vent opener, and will be installing a vent right at the top of the greenhouse.

However, it would work better if I had a lower opening which could let in cooler air. I was wondering if I attached some sort of opening with flaps over it: would the negative pressure of the rising warm air in the greenhouse leaving the vent pull the flaps open and cool air in?

I would, of course, have to protect the flaps from the wind. I was thinking a pipe with a couple of bends in it would do the trick.
 
allen lumley
pollinator
Posts: 4154
Location: Northern New York Zone4-5 the OUTER 'RONDACs percip 36''
58
books fungi hugelkultur solar wofati woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Gilbert Fritz : Face the Hinge to the prevailing winds, and your opening to the lee side. I had some friends who did not and hat the whole venting structure ripped
off of the greenhouse in a very localized wind event ! Thats all I've got ! BIG AL
 
Van Taylor
Posts: 18
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Put the auto vent opening at the bottom and get one of those attic vent turbines and put it at the top. The hot air rising will turn the turbine which will suck the hot air out whenever it get too hot or the wind is blowing. During the really cold days if you dont want it too operate just put a stick up in it or cover the bottom. Cheap and pretty much automatic. Van
 
His brain is the size of a cherry pit! About the size of this ad:
Video of all the permaculture design course and appropriate technology course (about 177 hours)
https://permies.com/wiki/65386/paul-wheaton/digital-market/Video-PDC-ATC-hours-HD
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!