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Posted by Noon-Air on December 31, 2007, 4:39 pm
>> >> Anything that limits the air flow through the diffuser is not good for
>> >> the
>> >> equipment. Generally, when there is less than the recommend airflow,
> it
>> > is
>> >> condsidered abuse by the manufactuer.
>> >
>> > I think the Acutherm wireless thermostat for their therma-fuser just
>> > alters
>> > the set point on the thermostats inside the diffuser. It doesn't alter
>> > airflow directly?
>>
>> Just how do you think they work if they don't alter airflow directly???
>
> Thermafusers alter the airflow as a result of an internal thermostat
> responding to airflow temperature around the thermostat. The wireless
> thermostat on the Acutherm unit appears to alter the setpoint temperature
> of
> that thermostat.
They "alter" the airflow by restricting it.... just how much restriction in
the airflow do you figure that its gonna take to make the system freeze up??
or to make the furnace to trip on an overtemp safety??
>> > And the therma-fuser gives each room occupant at least some ability to
>> > establish a personal preference a bit warmer or colder than the set
> point
>> > on
>> > the zone thermostat.
>>
>> They don't work like that.
>
> Room A on Zone 1 can set the thermofuser to close its damper below 70 and
> above 72.
>
> Room B on Zone 1 can set the thermofuser to close its damper below 71 and
> above 74.
>
> That certainly does affect the end temperature in each of those two rooms.
> It's not active heating or cooling from the therma-fuser, but it is
> certainly giving the room occupant some level of control on the end
> temperature, and at least it sets limits.
Its *STILL* nothing but smoke and mirrors and restricting the system
airflow.
You can argue all you want, that is still not gonna make it right.
>> > I know some large companies here in the Bay Area like
>> > Adobe put a therma-fuser on every outlet vent going into an employee's
>> > work
>> > area.
>>
>> As far as I can tell, either your trying to put a band aid on poorly
>> designed, badly installed, air distribution system(ductwork), or you
>> spamming these "smoke and mirrors" defusers. which is it??
>
> Badly designed, badly installed, badly redesigned, badly maintained
> systems
> with bad ductwork describes about 90% of the small commercial buildings
> that
> are 20 years old. And no one ever has the $3K to $10K budget to redo a
> zone. Usually the customer has a problem with a single room even
> *after*
> everything is rebalanced.
Thats only because there are hacks that will cut everybody elses throat to
get a job, even if they do the job at a loss. *competent*, professionally
trained, HVAC techs know what their time, training, education, and expertise
is worth, and will charge accordingly. I'm sorry that your having to contend
with the results of having the lowest bidder do the job. Thems tha
brakes.... get it right or get it cheap. BTW.... putting bandaids on the
system with smoke and mirrors defusers, is not going to *fix* anything....
only make the original problems worse.
> In any case, I was looking for brand recommendations for thermally
> controlled diffusers. I wasn't trying to convince anyone to use one.
>
> --
> Will
>
>
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