Greenhouse TO hot!
Greenhouse TO hot!
Oh my!!! It is only 80°F today and inside my home made green house WITH the door and window open with a fan on high is 96° In there.
This is for my seedlings mainly only. To keep 50% of the sun off then and any rain showers.
Question? I am going to add another door in the opposite side where the orange circle is. You think I will need to do that also on the sides? Where I live in NC the summer temperatures average between 85 and 90° Again today it was only 80° And I’ve been frantic Trying to cool this greenhouse down.
WOW!!! Quite a learning curve for me.
This is for my seedlings mainly only. To keep 50% of the sun off then and any rain showers.
Question? I am going to add another door in the opposite side where the orange circle is. You think I will need to do that also on the sides? Where I live in NC the summer temperatures average between 85 and 90° Again today it was only 80° And I’ve been frantic Trying to cool this greenhouse down.
WOW!!! Quite a learning curve for me.
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My name is Joe I Live in Hickory NC USA four equal perfect seasons.
Re: Greenhouse TO hot!
Just removed some of the sides and allow wind to blow in throughout the day. I have multiple windows open in my greenhouse, and up here it is just 10C even.
- Steve Johnson
- Posts: 4547
- Joined: Thu Nov 03, 2011 4:44 am
- Location: Los Angeles, CA (Zone 10b)
Re: Greenhouse TO hot!
I agree with Aiko in principle. Joe -- if you have doors on both ends of your greenhouse, it'll get much better air flow when you keep them open. Also, your fan is blowing air in the wrong direction. If you turn it around, it'll be an exhaust fan which exhausts hot air out of the greenhouse. Not as effective as a "squirrel cage" fan, but should help a little bit.
If you just want photos without all the blather, please visit my Flickr gallery.
My location: Los Angeles, CA (Zone 10b)
My location: Los Angeles, CA (Zone 10b)
- mikethecactusguy
- Posts: 2173
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- Location: Indio Ca
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Re: Greenhouse TO hot!
Heat rises. You need to vent the heat towards the top. Blowing cooler air in low will not help cool things down.
Mike The Cactus Guy
Enjoying the Spines
Enjoying the Spines
- greenknight
- Posts: 4821
- Joined: Tue Apr 30, 2013 4:18 am
- Location: SW Washington State zone 8b
Re: Greenhouse TO hot!
Good point. Though the plants are down low, it would still be more effective to expel the hot air near the roof.mikethecactusguy wrote: ↑Sat Mar 25, 2023 7:48 pm Heat rises. You need to vent the heat towards the top. Blowing cooler air in low will not help cool things down.
Maybe attach a board or a couple to 2x2s to the door frame tubing with screws or u-bolts and mount an exhaust fan to that.
Spence
Re: Greenhouse TO hot!
Ok Steve I was wondering about the fans Direction I’ve got four thermometers inside greenhouse to get things perfect.Steve Johnson wrote: ↑Sat Mar 25, 2023 2:18 amI agree with Aiko in principle. Joe -- if you have doors on both ends of your greenhouse, it'll get much better air flow when you keep them open. Also, your fan is blowing air in the wrong direction. If you turn it around, it'll be an exhaust fan which exhausts hot air out of the greenhouse. Not as effective as a "squirrel cage" fan, but should help a little bit.
My name is Joe I Live in Hickory NC USA four equal perfect seasons.
Re: Greenhouse TO hot!
greenknight wrote: ↑Sun Mar 26, 2023 1:29 amGood point. Though the plants are down low, it would still be more effective to expel the hot air near the roof.mikethecactusguy wrote: ↑Sat Mar 25, 2023 7:48 pm Heat rises. You need to vent the heat towards the top. Blowing cooler air in low will not help cool things down.
Maybe attach a board or a couple to 2x2s to the door frame tubing with screws or u-bolts and mount an exhaust fan to that.
Working on it now. THANK you
My name is Joe I Live in Hickory NC USA four equal perfect seasons.
Re: Greenhouse TO hot!
Sounds worthwhile to me. I will do it today. THANK YOU very muchmikethecactusguy wrote: ↑Sat Mar 25, 2023 7:48 pm Heat rises. You need to vent the heat towards the top. Blowing cooler air in low will not help cool things down.
My name is Joe I Live in Hickory NC USA four equal perfect seasons.
Re: Greenhouse TO hot!
If you have at least one hole / window in a opposite wall or roof it will be enough to get air to move. Fresh air will constantly come through the door and hot will pass away from window.
Re: Greenhouse TO hot!
Fresh air will constantly come through the door and hot will pass away from window."
Yes cross flow of air . When I grew cactus in Phoenix AZ the entire city was a greenhouse at 115F. Some types of cactus can take extreme heat and some don't like it. Better at 90F I would think ? A cool day in a Phoenix Summer. I used to freeze water bottles and use the ice to cool down the tap water in a bucket before watering my cactus with it. During a monsoon the rain was never hot .
Yes cross flow of air . When I grew cactus in Phoenix AZ the entire city was a greenhouse at 115F. Some types of cactus can take extreme heat and some don't like it. Better at 90F I would think ? A cool day in a Phoenix Summer. I used to freeze water bottles and use the ice to cool down the tap water in a bucket before watering my cactus with it. During a monsoon the rain was never hot .
Re: Greenhouse TO hot!
WOW Keith!!!! What a story!!!! Even the name “Phoenix” sounds hot!!!keith wrote: ↑Mon Mar 27, 2023 8:57 pm Fresh air will constantly come through the door and hot will pass away from window."
Yes cross flow of air . When I grew cactus in Phoenix AZ the entire city was a greenhouse at 115F. Some types of cactus can take extreme heat and some don't like it. Better at 90F I would think ? A cool day in a Phoenix Summer. I used to freeze water bottles and use the ice to cool down the tap water in a bucket before watering my cactus with it. During a monsoon the rain was never hot .
My name is Joe I Live in Hickory NC USA four equal perfect seasons.
Re: Greenhouse TO hot!
So Steve I just wanted to give you an update a conclusion on this thread. After it’s all been said and done at least with this particular handmade greenhouse 10f X 8f.JCcares wrote: ↑Mon Mar 27, 2023 7:08 pmOk Steve I was wondering about the fans Direction I’ve got four thermometers inside greenhouse to get things perfect.Steve Johnson wrote: ↑Sat Mar 25, 2023 2:18 amI agree with Aiko in principle. Joe -- if you have doors on both ends of your greenhouse, it'll get much better air flow when you keep them open. Also, your fan is blowing air in the wrong direction. If you turn it around, it'll be an exhaust fan which exhausts hot air out of the greenhouse. Not as effective as a "squirrel cage" fan, but should help a little bit.
Steve when I point the fan up to the ceiling it blows all the hot air out that window on the back door and keeps the greenhouse a perfect controlled temperature. At least for this greenhouse that’s how it’s working. When the 90f heat comes in the Summer like a carpet I’m going to roll up the sides to get some more ventilation.
My name is Joe I Live in Hickory NC USA four equal perfect seasons.
- Steve Johnson
- Posts: 4547
- Joined: Thu Nov 03, 2011 4:44 am
- Location: Los Angeles, CA (Zone 10b)
Re: Greenhouse TO hot!
Looks like you have it nailed, Joe! Good job!
If you just want photos without all the blather, please visit my Flickr gallery.
My location: Los Angeles, CA (Zone 10b)
My location: Los Angeles, CA (Zone 10b)