Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Commercial Greenhouse Heating

Commercial Greenhouse Heating

Commercial Greenhouse Heating

Good Evening -

I'm looking for a good commercial greenhouse growers forum - need to ascertain average heating cost, using NG/propane or electric heat for commercial greenhouse growers during the winter. Anyone have a good forum that has national participation?

Thanks -
Aquatic Technologies

RE: Commercial Greenhouse Heating


     I have used propane to heat my 4500 sq ft greenhouse before the cost of propane went up. Costs were over 1000 dollars per mo. during winter months. Since propane costs have more than doubled since then, it eats up a lot of profit. Natural gas prices will soon be rising also.
    One idea that crossed my mind is to enter into an arrangnent with a tree trimming company to recieve their wood chips.  Auger them into a silo next to a coal style boiler. Auger the dried chips into the boiler after they have had time to dry.  The silo could be fitted with an air line to push drying air up through the silo. The older dryer chips would be on the bottom while the newer green chips would be on top.  Corn stalk chips are also a more costley  option.

     Any liquid fuel boiler would give you the option to use what ever liquid fuel is least expensive.     

    The boiler water should perhaps contain antifreze to lube the recirculation pump, and etc.
     Getting the combustion out of the greenhouse also eliminates the possibility of flue gasses leaking into the greenhouse.
               good luck to you
               Sincerely Ray Peterson

RE: Commercial Greenhouse Heating

Does anyone have cost figures for heat pumps in greehnhouses?

RE: Commercial Greenhouse Heating

One quick formula to figure yearly fuel consumption is based on the heating degree days of the location.  The formula is ( 24 x design heat loss x HDD ) / ((T inside - T outside) x btu content of fuel x efficiency of heater)

If using heat pumps the EER of the heat pump is the ratio of the btu/h output of the heatpump  to the electrical consumption of the heatpump.  So divide the above number of yearly heat consumption by the eer and that will give you the yearly electrical consumption.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close