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Posted by geothermaljones on February 27, 2009, 10:57 pm
Inverter technology has been around for years.
Quiet enough to set the unit outside grandmas bedroom window.
(you know, the grandma that can still hear you coast up the driveway with
the lights & the engine off at 2:30am)
Trane built some of the first & gave up on it "mis-forecasting" the
future...
The Nips took it on like a storm.
Today variable speed & inverter drives are no longer cutting edge, products
not offering them are falling off the pace.
Even Trane has got to be looking a VFRZ... They've started relabling
everything else...
Though your question wasn't about EER's & SEER's, here's my $.02:
Where I come from EER & SEER be damned... typical residential cooling hours
run between 5-650 per year.
Heating Degree Days, on the other hand, are anywhere from 8500-10,000.
When I look for a HP I'm looking for HSPF. Anything under 7 is out of the
running, 8-9 looks good...
A 2 stage unit, oversized on the cooling side has some great benefits.
As always, duct size & airflow will be one of the biggest deciding factor.
goodluck
geothermaljones
>> I've been reading about this technology being used in heat pumps now.
>> The sound levels and energy savings are impressive.
>> BTW, I've a bit of experience with this in automated welding where it
>> has improved the performance/quality considerably.
> SEER donesn't really mean anything.... SEER numbers are done with
> virtually no load on the system. SEER testing is done with 80F inside and
> 82F outside. Pay attention to the EER numbers... those are the ones that
> count. EER is done with 95F outside. Check heat pump systems for
> efficiency here;
>
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> The sound levels and energy savings are impressive.
> BTW, I've a bit of experience with this in automated welding where it
> has improved the performance/quality considerably.