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Posted by Michael Bulatovich on March 8, 2008, 12:45 pm
RicodJour wrote:
>> RicodJour wrote:
>>>> Jude Alexander wrote:
>>
>>>>>>> I have four rooms where the air conditioning outlet (a 12"x12
>>>>>>> square box) is located at the center of the room.
>>
>>>>>>> I would like to install ceiling fans in three of the four rooms
>>>>>>> and naturally I wish to mount the ceiling fans also near the
>>>>>>> center of the room.
>>
>>>>>>> This means the AC vents will be inside of the "sweep circle" of
>>>>>>> the ceiling
>>>>>>> fan blades. I just mounted the fan box but has not yet
>>>>>>> installed the fan yet, but I think this will look odd...
>>
>>>>>>> I thought about relocating the AC vents but it will be quite a
>>>>>>> bit of work, and locating it somewhere else will not be as
>>>>>>> efficient.
>>
>>>>>>> So I want to ask if there are some guidelines regarding AC vents
>>>>>>> and ceiling fans being too close to each other...
>>
>>>>>> You could cut in a register further back along the duct and
>>>>>> fabricate a plug to fit inside and block off the abandoned part
>>>>>> of the duct leg.
>>
>>>>> Good advice. Cut the duct length shorter to fall just outside the
>>>>> fan circumference, reinstall the register and patch up the old
>>>>> hole.
>>
>>>> ...assuming it's a terminus....
>>
>>> If it's not, don't insert the plug.
>>
>> How far can you be from a reduction and have it still work well?
>
> You're assuming what exactly?
I thought I was the only one *not* assuming anything. Reread thread.
> That there are problems that require an
> AC guy. Why? Have you ever worked with an AC guy dong a relocation?
Gee, lemme check...yup, I think so. As I recall, I'm usually standing on
site next to them looking at the whole picture.
> They don't do any calculations, they see if it fits and stick it in.
> If they have to throw in some new flex and plug the old hole in the
> trunk line, they do it without calculating turbulent air flow
> effects. You're overanalizing a simple relocation.
Maybe so, but I've never had a claim either. I haven't been told the entire
context, I know nothing about where this is in the system, the air volume
before the change or it's relation to loads, whether the room's been
changed, etc.
Do the duct guys often spitball installations? Gee, lemme check...yup, I
think so. How often does that turn out well? I can't say, but,
annectdotally, I am currently involved in remedial work with a system
installed by hacks. The system is an unbalanced mess and the clients are
freezing in places.
My insurer, and my association expect me to be careful when offering advice,
and I try my best to oblige them. Never had a claim, let alone a
judgement....Now if only the hacks who do it all the time would find that
reflected in the premiums, I'd have something other than satisfaction to
show for it.
> In MC's situation it's not necessary to even more the register since
> the register is barely within the sweep of the fan blades - it's not
> worth the effort. In the amount of time spent with this back and
> forth, I could have finished the register relocation and gotten two
> coats of tape on, but more likely I would have let it lie and moved on
> to another project that actually needs to be done.
"Onward!"
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