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BTU question geoman 07-15-2006
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Posted by geoman on July 15, 2006, 10:08 am
Lights for Manual J. I'm not confident with the old stand by 2 watss per ft2
since the new electronic fixtures. And computors have changed a great deal.
What is everyone using for these BTU gains in J?

The new style floresents four bulb suspended ceiling fixtures, what is
appropriate to use for BTU gain?

Computors. Changing all the time.

Desktop BTU with CTR btu output?

Desktop BTU with LCD Screen output?

Laptop BTU output?


Thanks

Rich



Posted by Noon-Air on July 15, 2006, 6:22 pm
Sounds like your doing new construction commercial stuff... You might want
to consult 29CFR (OSHA regs) for the requirements.

> Lights for Manual J. I'm not confident with the old stand by 2 watss per
> ft2 since the new electronic fixtures. And computors have changed a great
> deal. What is everyone using for these BTU gains in J?
>
> The new style floresents four bulb suspended ceiling fixtures, what is
> appropriate to use for BTU gain?
>
> Computors. Changing all the time.
>
> Desktop BTU with CTR btu output?
>
> Desktop BTU with LCD Screen output?
>
> Laptop BTU output?
>
>
> Thanks
>
> Rich
>
>



Posted by geoman on July 16, 2006, 12:47 am
What does OSHA's msds and drug programs have to do with heat gains?


> Sounds like your doing new construction commercial stuff... You might want
> to consult 29CFR (OSHA regs) for the requirements.
>
>> Lights for Manual J. I'm not confident with the old stand by 2 watss per
>> ft2 since the new electronic fixtures. And computors have changed a great
>> deal. What is everyone using for these BTU gains in J?
>>
>> The new style floresents four bulb suspended ceiling fixtures, what is
>> appropriate to use for BTU gain?
>>
>> Computors. Changing all the time.
>>
>> Desktop BTU with CTR btu output?
>>
>> Desktop BTU with LCD Screen output?
>>
>> Laptop BTU output?
>>
>>
>> Thanks
>>
>> Rich
>>
>>
>
>



Posted by Fat Eddy on July 16, 2006, 1:11 am

geoman wrote:
> What does OSHA's msds and drug programs have to do with heat gains?
>
>
> > Sounds like your doing new construction commercial stuff... You might want
> > to consult 29CFR (OSHA regs) for the requirements.
> >
> >> Lights for Manual J. I'm not confident with the old stand by 2 watss per
> >> ft2 since the new electronic fixtures. And computors have changed a great
> >> deal. What is everyone using for these BTU gains in J?
> >>
> >> The new style floresents four bulb suspended ceiling fixtures, what is
> >> appropriate to use for BTU gain?
> >>
> >> Computors. Changing all the time.
> >>
> >> Desktop BTU with CTR btu output?
> >>
> >> Desktop BTU with LCD Screen output?
> >>
> >> Laptop BTU output?
> >>
> >>
> >> Thanks
> >>
> >> Rich
> >>
> >>
> >
> >

If you are talking about one flourescent light fixture and one
computer, it is easy, just neglect it in your load calc but if you are
trying to figure the load on a commercial building by researching the
btu output of a computer screen ,Then you are dowmright scary.,


Posted by Noon-Air on July 16, 2006, 9:47 am
29CFR (OSHA regs) define the amount of light required for various types of
commercial and industrial spaces... expressed in "foot candles".... 2 watts
per sqft is nothing more than a rule of thumb, or a wild assed guess.

When in doubt... count the number of each type of light fixture, and run the
calcs.
Yes, computers are changing all the time, so it would pay to check each
one... LCD displays generate a lot less heat than CRTs do, etc.
Yes I do my homework.


> What does OSHA's msds and drug programs have to do with heat gains?
>
>
>> Sounds like your doing new construction commercial stuff... You might
>> want to consult 29CFR (OSHA regs) for the requirements.
>>
>>> Lights for Manual J. I'm not confident with the old stand by 2 watss per
>>> ft2 since the new electronic fixtures. And computors have changed a
>>> great deal. What is everyone using for these BTU gains in J?
>>>
>>> The new style floresents four bulb suspended ceiling fixtures, what is
>>> appropriate to use for BTU gain?
>>>
>>> Computors. Changing all the time.
>>>
>>> Desktop BTU with CTR btu output?
>>>
>>> Desktop BTU with LCD Screen output?
>>>
>>> Laptop BTU output?
>>>
>>>
>>> Thanks
>>>
>>> Rich
>>>
>>>
>>
>>
>
>



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