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Suspended Gas Unit Heaters (OT)

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Alan (California Radiant) Forbes
Alan (California Radiant) Forbes Member Posts: 4,005
in THE MAIN WALL
I have a customer that wants to heat her art studio.  She has 25' ceilings and wants a ceiling mounted unit heater.  I've seen them many times, sometimes their fans are very noisy.  Does anyone know of a manufacturer that has a quiet one?
8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

Two btu per sq ft for degree difference for a slab

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  • Tim McElwain
    Tim McElwain Member Posts: 4,625
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    Alan, most of the

    ones I have seen are noisy because the blower is out in the open space. How about a duct heater which can be suspended.
  • Jack
    Jack Member Posts: 1,047
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    Look at

    a Rinnai Energysaver. Look at a Fujitsu mini-split heat pump. Where is the job? Again, my bias is noted as I represent both companies, but both are excellent solutions 
  • Zxv
    Zxv Member Posts: 1
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    Low intensity radiant heater

    You might consider radiant tube heaters. They put out beautiful heat and are virtually silent and work very well in high ceiling situations like you have there. Check Space Ray Co. There are several manufacturers, I looked at them on www.spaceray.com. Clearance from combustibles would be the most important consideration with these units. I have used them from garages to Church halls with success.
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,005
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    Heating

    Thanks, Tim.  The noise problem was definitely an issue for me, but I went to Reznor's website and checked out the spec's. on model UDAP and was surprised to find sound data and that the fans have been re-engineered for noise.  Forty-seven decibels at 15 feet which is less than normal conversation (60 decibels). 



    A ducted heater would work well, but I don't do that kind of work and I want the job. 



    I'll check out Rinnai and Fujitsu.  This studio has no outside walls, so we can't direct vent.



    The infrared heaters would be perfect (no noise) except that even though they are vented, they still produce some CO and the studio is an enclosed space.



    Thanks, everyone for your help.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Jack
    Jack Member Posts: 1,047
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    Vent extensions

    You can run vent extensions on the Rinnai's. Max rise of 8' (ideal for basements), total of two additional 90's, max total run of 13', so you could run the 13' horiz. to reach the outside wall. They are in various kits depending upon length. One key to lay-out is your outside termination height. Start from the outside and work in. grade from the heater down to the outside.

    Go to www.rinnai.us Then select customer service and DV and the install manuals are there. Check it out and post your questions. One of the good thinks about the heaters is the vent arm will pivot up so you can gain height behind the vestibule enclosure to give the most termination clearance. What do you think the load is?
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