ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
From an outsider- How does tipping work?
by HotLine1 - 12/04/20 01:09 PM
Thought this was funny
by HotLine1 - 12/04/20 12:55 PM
Happy Thanksgiving
by Trumpy - 12/02/20 04:11 AM
Where is Everyone?
by Trumpy - 12/02/20 03:51 AM
What does your work place look like?
by Trumpy - 12/02/20 03:42 AM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
0 registered members (), 17 guests, and 15 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
greenhouse exhaust fan speed controll #207013 09/14/12 02:49 AM
Joined: Feb 2008
Posts: 21
J
jackolsen Offline OP
Member
my wife just had green house built 16x20 ft i would like to control the tempeture in the greenhouse with the help of
a exhaust fan about 4000cfm would a vfd work and how do i controll the speed with a stat ?the motor would be about 0.5hp any one know what is the best way to do this
Thanks
jack

Work Gear for Electricians and the Trades
Re: greenhouse exhaust fan speed controll [Re: jackolsen] #207021 09/14/12 07:30 PM
Joined: Jul 2004
Posts: 9,547
G
gfretwell Offline
Member
Probably the easiest way is just a regular stat with a relay.


Greg Fretwell
Re: greenhouse exhaust fan speed controll [Re: jackolsen] #207027 09/15/12 04:01 PM
Joined: Mar 2005
Posts: 1,803
Alan Belson Offline
Member
Get an automated light [window] opener, it works for free. A fan will remove plant food, [ good old carbon dioxide ] and force entry of a plethora of disease spores and spider-mites, apart from the cost of running a fan. A timed/sensed watering distibutor/mats will be better way to improve your glasshouse. I use bagged compost, not soil, and use it to pot flowers up the next year, third year as a soil improver. My little 8x6 produced 13 cantaloupe melons this year, plus 2 cucumbers a week and more tomatoes than we could eat. Best of luck next year and good eating!

Last edited by Alan Belson; 09/15/12 04:04 PM.

Wood work but can't!

Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
sparky66wv
sparky66wv
West Virginia
Posts: 2,236
Joined: November 2000
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 20
Popular Topics(Views)
272,256 Are you busy
206,143 Re: Forum
194,135 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3