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Dehumidifier Has Impossible-to-Change Air Filter

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John
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Gold
flex duct
John   6/5/2014 9:03:15 AM
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I think your solution was best, but would the flexible duct work not have sagged and potentialy caused problems over time? 

Ray Jorgenson
User Rank
Silver
Re: More Service
Ray Jorgenson   6/5/2014 9:16:46 AM
I share everyone's frustration, but I don't honestly share the conspiracy theory. I think it's plain incompetance on the designer's part due to lack of practical experience. A lot of us old timers grew up taking things apart, fixing things, tuning up cars, and making things for the fun of it. A lot of that is now longer practical, and there is no longer a lot of interest in hands on activities. And instead of actually building things in the real world, most new engineers now 'build' things in CAD only, and never really have the experience of putting things together and servicing them. 

This problem is made worse by the push to do more with fewer people. As a result, there is no longer the ability of new engineers to be mentored by expereienced engineers in the practical side of things.

OLD_CURMUDGEON
User Rank
Platinum
Re: More Service
OLD_CURMUDGEON   6/5/2014 2:00:55 PM
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Ray: In our case, both contractors, the orginal one who has been servicing our A/C for years, and is a middle-aged fellow, claimed that because the new air handler is more efficient & so, larger, it could not be installed in the attic space.  The other fellow, who did the work, was also a middle-aged person with about 30 years experience in A/C systems, both commercial & residential.  So, while I DO share yout sentiment in many respects, in our case, age & experience was NOT a factor.

ADIOS!

William K.
User Rank
Platinum
Re: More Service
William K.   6/5/2014 9:11:00 PM
R.J. I did not get a lot of mentoring, although I did collect a good bit of criticism for every mistake that I made. I did have an "advantage??" of working at Chrysler Central engineering for a few years, and seeing just how some large companies work. That really helped motivate me to work at a smaller company, which the ones that I worked at all of the engineers could talk to each other and share ideas. It was a fast learning experience moving from a development department at a huge company to an organization that would routinely go from concept to delivered product in 18 weeks. And every one of those jobs was a custom order. In that environment I chose to learn from the machinists and machine builders as well as from the mechanical engineers. I did make quite a few points with the machinists when I commented that it would not take me any longer to learn their job then it would take them to learn mine. Mutual respect is a great way to interact with other groups in an organization. Way too often engineering and design people don't pay adequate attention to te production side of a business, which is unfortunate, since understanding how your resources function is the best way to know how to utilize them.

William K.
User Rank
Platinum
Re: flex duct
William K.   6/7/2014 7:56:25 PM
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John, flex duct is great as a last resort solution, but it should generally be avoided, at least the corrogated type due to the greater pressure drop caused by all of those ridges and valleys. Pressure drop equates to flow reduction and loss of efficiency.

JimT@Future-Product-Innovations
User Rank
Blogger
Re: More Service
JimT@Future-Product-Innovations   6/17/2014 6:45:32 PM
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I've owned three homes in my life and in each one I've found it necessary to modify the original intent of filter placement on the central HVAC systems.  I swear, its like the design engineers (or sometimes just the installers) really have no clue as how difficult monthly replacement is going to be for the resident!

No, I do not believe there is some kind of conspiracy, because the design engineers would not benefit from such a deal in the corporate scheme of conspiracy.  I think it more likely is just poor forethought.

DryDog
User Rank
Iron
Re: flex duct
DryDog   7/25/2014 11:14:47 AM
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Mfr installation manual on the web shows the unit equipped with round duct collars and recommends flex duct for installation. Appears flex duct is the preferred default installation method and other ducting methods are less desireable. May want to change this one to "installed by monkeys".

William K.
User Rank
Platinum
Re: More Service
William K.   7/27/2014 9:38:21 PM
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It is a serious mistake to say that the typical installation is engineered. They are put in by a sheetmetal installer or an HVACC tech, and generally not a whole lot of consideration is given to servicability. That is true of a whole lot of product installations, that the installation is not designed, but rather that it is simply assembled. There is usually a huge difference between systems that are actually engineered and those just assembled.

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