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  1. #1
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    What Is This Thing?

    I ran across this on a commercial property yesterday. I've never seen one before, seems like it might be a fire damper of some sort? The top picture is looking down inside an 8" round collar.
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  2. #2
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    Temperature controlled supply grill

  3. #3
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    Made by Acutherm, I think. That has two bulbs, so it's designed to work for both heat and cool. They are used when you have balance issues, or on VAV systems. And they work great, by the way.
    If you were a real tech, you'd solder a relay on that board and call it good to go.

    I do a triple evac with nitro to remove non condensables.

    I use 56% silver on everything except steel.

    Did you really need the " If you were a real tech " ??

  4. #4
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    If you were a real tech, you'd solder a relay on that board and call it good to go.

    I do a triple evac with nitro to remove non condensables.

    I use 56% silver on everything except steel.

    Did you really need the " If you were a real tech " ??

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  6. #5
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    Thread Starter
    Okay, that makes sense thank you. Will these work for the ladies office who is going through menopause?

  7. #6
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    Quote Originally Posted by Tiger93rsl View Post
    Okay, that makes sense thank you. Will these work for the ladies office who is going through menopause?
    Nothing works under that situation!

  8. #7
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    Hey that's cool!
    @Wayne3298
    @bradluke

    As balancers, do you guys have input on these?
    Work ok for...say just 1 room (of many) all served by a single zone constant volume heat/cool system?

    Sent from my SM-G950U using Tapatalk

  9. #8
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    Quote Originally Posted by icy78 View Post
    Hey that's cool!
    @Wayne3298
    @bradluke

    As balancers, do you guys have input on these?
    Work ok for...say just 1 room (of many) all served by a single zone constant volume heat/cool system?

    Sent from my SM-G950U using Tapatalk
    There just for hot or cold "Spots" wouldn't use then throughout a building.

  10. #9
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    Quote Originally Posted by pecmsg View Post
    There just for hot or cold "Spots" wouldn't use then throughout a building.
    That's what I wanted to know. Thanks

    Sent from my SM-G950U using Tapatalk

  11. #10
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    I have seen entire buildings use those. They end up being the VAV, so no other VAV box, controls, or stats are required. They are pricey, but you save a lot in labor and other materials, so they probably work out to be cost effective.

    Ever since I first saw them, I've used them to correct hot or cold spots. One rather common use for me has been conference rooms that do not have their own dedicated unit or zone. Another somewhat common use is when you have one unit serving both interior and perimeter spaces.


    Quote Originally Posted by pecmsg View Post
    There just for hot or cold "Spots" wouldn't use then throughout a building.
    If you were a real tech, you'd solder a relay on that board and call it good to go.

    I do a triple evac with nitro to remove non condensables.

    I use 56% silver on everything except steel.

    Did you really need the " If you were a real tech " ??

  12. #11
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    Quote Originally Posted by Tiger93rsl View Post
    I ran across this on a commercial property yesterday. I've never seen one before, seems like it might be a fire damper of some sort? The top picture is looking down inside an 8" round collar.
    they are called "thermo-fusers" in dallas, you twist the gold nob on the end to set the temp that they open and close. they are a pricy crutch to a shitty install. it don't need that seal tape on it, dam sure wont work right with that.

  13. #12
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    Who'd a thunk
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