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  1. #1

    Warehouse Heaters for Light Assembly Environment

    Hello,

    I have a customer who wants me to make his heaters a little bit more people friendly.
    He manages a 65,000 sq ft light assembly environment that was once a warehouse environment with heat designed for warehouse.
    There are 2 - 25' tall giant gas heaters along the eastern wall of the building with intake on the bottom and exhaust on the top about 15' apart from intake to exhaust.
    When the heat is turned the blower runs constantly and the gas heat comes on intermittently. There are about 125 people in this room and when those heaters come on it is very loud, windy, and breezy. Papers are flying off of desks and everyone is complaining. Is there any practical solution to making these mega heaters a bit more personnel friendly?

    Thanks for the help.

    Jim

  2. #2
    Join Date
    Oct 2010
    Location
    SW Michigan, near Battle Creek
    Posts
    921
    cant think of much. it would be like trying to make a frieght train sound like a chevy. move the desks of course.

  3. #3
    Thanks for the reply. Can't move the tables, they are 50 feet long.

  4. #4
    Join Date
    Jul 2007
    Location
    Delaware
    Posts
    3,824
    Is the supply coming out the bottom?
    Always here

  5. #5
    Quote Originally Posted by energy star View Post
    Is the supply coming out the bottom?
    No sir, the intake is on the bottom and the exhaust is on the top.

    Hello,

    I have a customer who wants me to make his heaters a little bit more people friendly.
    He manages a 65,000 sq ft light assembly environment that was once a warehouse environment with heat designed for warehouse.
    There are 2 - 25' tall giant gas heaters along the eastern wall of the building with intake on the bottom and exhaust on the top about 15' apart from intake to exhaust.
    When the heat is turned the blower runs constantly and the gas heat comes on intermittently. There are about 125 people in this room and when those heaters come on it is very loud, windy, and breezy. Papers are flying off of desks and everyone is complaining. Is there any practical solution to making these mega heaters a bit more personnel friendly?

    Thanks for the help.

    Jim

  6. #6
    Join Date
    Sep 2002
    Location
    Hampton Roads, Virginia
    Posts
    1,605
    Add some ductwork?
    "Profit is not the legitimate purpose of business. The legitimate purpose of business is to provide a product or service that people need and do it so well that it's profitable."

    James Rouse

  7. #7
    Join Date
    Oct 2010
    Location
    SW Michigan, near Battle Creek
    Posts
    921
    Quote Originally Posted by klrogers View Post
    Add some ductwork?
    yeah, if the equipment is legal for ductwork. maybe some cubical partitions to baffle the return if it is retun air blowing the papers off the desks?

  8. #8
    Join Date
    Jul 2007
    Location
    Delaware
    Posts
    3,824
    I have put those in. You may be able to add 8' of duct on the top supply. Also look into a good diffuser manufacture (Titus or Price) they will help. You need a louvered (movable) diffuser face.
    Always here

  9. #9
    Quote Originally Posted by fearlessfurnace View Post
    yeah, if the equipment is legal for ductwork. maybe some cubical partitions to baffle the return if it is retun air blowing the papers off the desks?
    Actually it is the supply air that is blowing papers off of the tables.
    It is also noisy and breezy.

    Thank You,
    Jim

  10. #10
    Join Date
    Apr 2004
    Location
    Muskegon, Mi.
    Posts
    425
    Check out ductsox.com. Might give you some ideas.

  11. #11
    Join Date
    Apr 2007
    Location
    Pa
    Posts
    758
    Sounds like you have air rotation equipment. Not much you can do to change the unit. Check the diffusers that they are perpendicular to the floor and blowing out and not down. Also find out what the equipment is designed for. Air rotation equipment is designed to have 2-3 air rotations within an hour and if it is more than that you will feel drafts through out the building. Make sure you have the correct temp rise and check the fans, you might be able to slow them down a bit. I find most air rotation equipment I run across designed with a 60 rise. See if the unit can be staged in any way so you can always keep the burner on. Is it a 3:1 burner, or just on/off.

    These units usually have a prop fan so static pressure won't be that high.

  12. #12
    Join Date
    Mar 2003
    Posts
    7,326
    yeah, air rotation, most likely johnson marcraft units. typically these do not get ductowork and cannot really handle a buttload of external static. These are mostly used for manufacturing environments where noise isnt an issue. They are suposed to Throw the air out and have it cycle back into the bottom. A vfd may help if you slow down the air some, but you need to watch the temp rise when the burner is firing so you dont overheat it.

  13. #13
    Join Date
    Jan 2003
    Location
    Kansas City
    Posts
    1,482
    Like flange says, a vfd and some type of modulating discharge air control would allow you to reduce noise, but you would also be reducing heat output and it may not be enough to heat the space.

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