• Welcome to the Chronicle Forums.
    Please complete your profile. The forums and the rest of www.chronofhorse.com has single sign-in, so your log in information for one will automatically work for the other. Disclaimer: The opinions expressed here are the views of the individual and do not necessarily reflect the views and opinions of The Chronicle of the Horse.



Forum rules and no-advertising policy

As a participant on this forum, it is your responsibility to know and follow our rules. Please read this message in its entirety.

Board Rules

1. You’re responsible for what you say.
As outlined in Section 230 of the Communications Decency Act, The Chronicle of the Horse and its affiliates, as well Jelsoft Enterprises Ltd., the developers of vBulletin, are not legally responsible for statements made in the forums.

This is a public forum viewed by a wide spectrum of people, so please be mindful of what you say and who might be reading it—details of personal disputes are likely better handled privately. While posters are legally responsible for their statements, the moderators may in their discretion remove or edit posts that violate these rules. Users have the ability to modify or delete their own messages after posting, but administrators generally will not delete posts, threads or accounts upon request.

Outright inflammatory, vulgar, harassing, malicious or otherwise inappropriate statements and criminal charges unsubstantiated by a reputable news source or legal documentation will not be tolerated and will be dealt with at the discretion of the moderators.

2. Conversations in horse-related forums should be horse-related.
The forums are a wonderful source of information and support for members of the horse community. While it’s understandably tempting to share information or search for input on other topics upon which members might have a similar level of knowledge, members must maintain the focus on horses.

3. Keep conversations productive, on topic and civil.
Discussion and disagreement are inevitable and encouraged; personal insults, diatribes and sniping comments are unproductive and unacceptable. Whether a subject is light-hearted or serious, keep posts focused on the current topic and of general interest to other participants of that thread. Utilize the private message feature or personal email where appropriate to address side topics or personal issues not related to the topic at large.

4. No advertising in the discussion forums.
Posts in the discussion forums directly or indirectly advertising horses, jobs, items or services for sale or wanted will be removed at the discretion of the moderators. Use of the private messaging feature or email addresses obtained through users’ profiles for unsolicited advertising is not permitted.

Company representatives may participate in discussions and answer questions about their products or services, or suggest their products on recent threads if they fulfill the criteria of a query. False "testimonials" provided by company affiliates posing as general consumers are not appropriate, and self-promotion of sales, ad campaigns, etc. through the discussion forums is not allowed.

Paid advertising is available on our classifieds site and through the purchase of banner ads. The tightly monitored Giveaways forum permits free listings of genuinely free horses and items available or wanted (on a limited basis). Items offered for trade are not allowed.

Advertising Policy Specifics
When in doubt of whether something you want to post constitutes advertising, please contact a moderator privately in advance for further clarification. Refer to the following points for general guidelines:

Horses – Only general discussion about the buying, leasing, selling and pricing of horses is permitted. If the post contains, or links to, the type of specific information typically found in a sales or wanted ad, and it’s related to a horse for sale, regardless of who’s selling it, it doesn’t belong in the discussion forums.

Stallions – Board members may ask for suggestions on breeding stallion recommendations. Stallion owners may reply to such queries by suggesting their own stallions, only if their horse fits the specific criteria of the original poster. Excessive promotion of a stallion by its owner or related parties is not permitted and will be addressed at the discretion of the moderators.

Services – Members may use the forums to ask for general recommendations of trainers, barns, shippers, farriers, etc., and other members may answer those requests by suggesting themselves or their company, if their services fulfill the specific criteria of the original post. Members may not solicit other members for business if it is not in response to a direct, genuine query.

Products – While members may ask for general opinions and suggestions on equipment, trailers, trucks, etc., they may not list the specific attributes for which they are in the market, as such posts serve as wanted ads.

Event Announcements – Members may post one notification of an upcoming event that may be of interest to fellow members, if the original poster does not benefit financially from the event. Such threads may not be “bumped” excessively. Premium members may post their own notices in the Event Announcements forum.

Charities/Rescues – Announcements for charitable or fundraising events can only be made for 501(c)(3) tax-exempt organizations. Special exceptions may be made, at the moderators’ discretion and direction, for board-related events or fundraising activities in extraordinary circumstances.

Occasional posts regarding horses available for adoption through IRS-registered horse rescue or placement programs are permitted in the appropriate forums, but these threads may be limited at the discretion of the moderators. Individuals may not advertise or make announcements for horses in need of rescue, placement or adoption unless the horse is available through a recognized rescue or placement agency or government-run entity or the thread fits the criteria for and is located in the Giveaways forum.

5. Do not post copyrighted photographs unless you have purchased that photo and have permission to do so.

6. Respect other members.
As members are often passionate about their beliefs and intentions can easily be misinterpreted in this type of environment, try to explore or resolve the inevitable disagreements that arise in the course of threads calmly and rationally.

If you see a post that you feel violates the rules of the board, please click the “alert” button (exclamation point inside of a triangle) in the bottom left corner of the post, which will alert ONLY the moderators to the post in question. They will then take whatever action, or no action, as deemed appropriate for the situation at their discretion. Do not air grievances regarding other posters or the moderators in the discussion forums.

Please be advised that adding another user to your “Ignore” list via your User Control Panel can be a useful tactic, which blocks posts and private messages by members whose commentary you’d rather avoid reading.

7. We have the right to reproduce statements made in the forums.
The Chronicle of the Horse may copy, quote, link to or otherwise reproduce posts, or portions of posts, in print or online for advertising or editorial purposes, if attributed to their original authors, and by posting in this forum, you hereby grant to The Chronicle of the Horse a perpetual, non-exclusive license under copyright and other rights, to do so.

8. We reserve the right to enforce and amend the rules.
The moderators may delete, edit, move or close any post or thread at any time, or refrain from doing any of the foregoing, in their discretion, and may suspend or revoke a user’s membership privileges at any time to maintain adherence to the rules and the general spirit of the forum. These rules may be amended at any time to address the current needs of the board.

Please see our full Terms of Service and Privacy Policy for more information.

Thanks for being a part of the COTH forums!

(Revised 1/26/16)
See more
See less

Barn exhaust fans - how big do I need?

  • Filter
  • Time
  • Show
Clear All
new posts

  • Barn exhaust fans - how big do I need?

    Our barn was not built as a barn - it was originally a workshop and was heated and cooled - thus no ridge vents and hotter than heck. It is also 'square' with a huge aisle and no doors north/south. Over the years it's been modified to try and facilitate ventilation, but it's still very, very hot. Just rollup doors on east/west, smaller openings north/south, several 3' square 'horse windows' and most of one side open from 4' up with an overhang to encourage ventilation. But the plus factor is it's connected to our house by a breezeway which is the best thing about it. Unfortunately, the house also blocks the south breeze for the most part.

    We are buying 2 attic fans and having them installed in the eaves at each end. Our regular 'fix it' guy has found some commercial fans and my husband says with both of them, we should have a complete 'turnover' of air inside the barn every 10 minutes.

    Is that enough to do any good? I am not sure. Our barn is about 1900 square feet -- probably close to 23000 cubic feet.
    Donerail Farm

  • #2
    Sounds about right. I have a similar issue with my barn...it gets HOT easy. Despite eave vents, a full ridge vent, cupola, 6 windows, etc. But I have a front aisle barn and one main door, so little to no cross breeze. And my barn area is in a valley type area so not much wind down there sometimes anyways.

    I put in 2 16" vent fans, both are set into the roof and not the eaves though. They pull more air with my set up that way since they're pulling mostly from windows and one front 8x7' door. Eave set ups probably work better with a center aisle set up though, not sure.

    My barn is 24x40...so 960 sf. My two fans do a full interior air exchange every 90 seconds - 2 minutes inside the barn. You can feel the breeze standing in front of the doors or windows. They're also shoving out all the hot air under the roof.

    Are the fans you're looking at thermostat controlled? That's a huge help...the fans will go on when the temp near them reach a certain degree and shut off when it cools down enough near the fans. Mine are set at 75 degrees, so set on a lower temp to work as often as possible to keep the air fresh inside the barn.

    Vent fans can be a bit loud...a constant drone. Check the box for the "sone" rating...anything a 1.5 or lower will be considered quiet. Anything over that (I think it goes up to 4.0?) will be a bit louder...wiith a 4.0 sounding pretty loud. Mine are a 2.0, so not quiet but not deafening. The horses seem to like the noise, it's a background white noise and they doze off in the cooler air and noise. I don't find it overly loud.

    Make sure they have a set in trip or hooked up to a trip in case they overheat.

    You'll really like having them. I consider my vent fans to be one of my top fave things in my barn. I can drop the temp in the barn from 95 to 75 in dry heat and down 10 degrees in humid heat. It's almost like air conditioning. And my barn is never stuffy. They don't cost a ton to run unless we have a long heat wave. And they do just fine running for a week straight too. (no overheating)

    Do consider putting screens over them on the interior if you use thermostat controls. Otherwise a bird might be sitting in them when they turn on...and that makes a helluva mess. (don't ask, feathers were everywhere!)

    And get a duster on an extending pole so you can peal the screen down and dust it off once in a while.

    But I'm going to bet you'll think they're the best barn improvement ever once you get them hooked up!
    You jump in the saddle,
    Hold onto the bridle!
    Jump in the line!


    • #3
      I'm looking at ordering exhaust fans today. My barn is just over 70,000cf. I'm planning on 2 - 48" fans (one at east end, one at west end) that move 19k cf/air/minute. So it will recycle every few minutes.

      We have 44" area we can open to put them in about 2' down from the top of ceiling. OR we have 22" x 44" area that is already cut out for ventelation we can put them in but I can't imagine 24" fans will move enough air for how hot/large the steel barn is? If we use the 24" fans in top area then I'll patch the rest of the hole (up to the 44" width- it's already 22" high).

      Did you get louviers on your fans? I'm thinking I need to install fans on inside of barn and put louviers flush with barn wall to help keep out rain/snow, etc.

      Any ideas?


      • #4
        Here are how mine are installed:
        Exterior close up:

        Exterior placement:


        They're about 2' down (give or take) from the center ridge.
        This was right after they were installed, I've since added screens to the interior to help keep some dust out but mostly to keep baby swallows from getting sucked through.
        The screens are just cut from a $6 roll of metal window screen to fit over the fan. We stick the screens onto the exposed screw heads that hold the exterior fan housing on, just shove the screen right on those and it holds great.
        I use an extended pole with a brush on it to clean the screens when they get dusty or else just pull them down and hose them off or replace them with newly cut pieces.

        Every couple weeks in summer when they run I stand on a muck bucket and using 2 tube extensions on the big-ass back pack leafblower I can blow out the intake of the fan to clear it of dust so the bearings don't grind or the motor blows up before it's time. Takes 2 minutes per fan, very important to keep the fans in good working order.

        They're also thermostat controlled and set on trips for safety.

        95% of the time they work awesome...like air conditioning in the barn! But a day like yesterday....103 here with killer humidity...they act more like an oven-fan...just moving hot air.
        Today it's 93 right now and a lot less humid and they vent fans coupled with the stall fans:

        make for a nice breezy cooler stall.
        You jump in the saddle,
        Hold onto the bridle!
        Jump in the line!


        • #5
          Sorry.. this is the type of fan I was talking about. I have the roof vent fans- they don't move enough air (don't have enough- would need at least 10-12 of them to help- barn too big). http://www.globalindustrial.com/p/hv...rect-drive-1hp


          • #6
            Ooo those will move mega air! Around here the cow palaces have those...as do large hay buildings and warehouses.
            I'd love to use those as end eave vents, but that size would make my entire barn airborn!

            I would think louvres would be beneficial.
            You jump in the saddle,
            Hold onto the bridle!
            Jump in the line!


            • Original Poster

              I have mine installed now. Unfortunately my husband put himself in charge of this project and he purchased the fans before giving me input. (Because he knew I woudl want bigger/more expensive fans!!)

              We have 12" diameter fans installed in the gables on both ends. I woudl have gotten larger fans, at least 24" diameter, but our installer says these will completely change out air every 10 minutes. I am not sure that is enough. We got them right before we had huge rainstorms and it's been generally cooler, so too soon to tell how much they really help. It does SEEM to me there is more cooler air moving around - I think as the fans suck the hot air out, they are bringing in cool air and making more of a breeze through the barn.

              We already had a screened louvre at one end for air circulation, and he mounted one just directly behind that inside the barn. He purchased a set of louvers for the other one. They are not automatic - they have plug-in cords, but we already had a plug almost directly beneath where they were installed. I would have chosen ones on a thermostat.
              Donerail Farm


              • #8
                I'm eyeing a solar powered gable vent fan at Home Despot...
                "It's like a Russian nesting doll of train wrecks."--CaitlinandTheBay

                ...just settin' on the Group W bench.