Pianotech

  • 1.  Dampp Chaser situation question

    Registered Piano Technician
    Posted 20 days ago
      |   view attached

    Hello, I recently moved my personal pianos into a new studio space- a new building on my property. I had Dampp Chasers installed in both pianos which I removed before the move to the new space. I have been able to keep the new space very easily between 38-45% humidity, and most of the time it sits right between these numbers. The systems are getting a little bit old and I'm trying to decide if it's actually worth installing them when my room stays as consistent as it does. In your experience, is there a point where the hassle or unlikely but possible system malfunction is worth the little bit better humidity stability? I'm inclined to leave them off.

    Thanks!



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    Tim Foster RPT
    New Oxford PA
    (470) 231-6074
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  • 2.  RE: Dampp Chaser situation question

    Registered Piano Technician
    Posted 19 days ago

    Hi Tim,

    first: what a beautiful setup, a feast for the eyes!
    then: how old are these systems that you have installed?

    My first instinct, whatever the age of these systems are is that I myself, too, would be inclined to leave them unplugged. Sounds like your studio space is an excellent environment just as it is. 

    Then, in my experience there are two main issues I regularly encounter out in the field (I maintain and service 100+ of these systems). The first is user inconsistency, a)  accidentally unplugging the system from the power outlet, b) "forgetting" to fill up water. Sometimes both or any of these inconsistencies can change the RH under the grands so drastically that it'd basically be better if there were no systems installed at all (!)

    Now, a well maintained system is of excellent help regarding this first issue. But no level of regular user maintenance can help with the second issue: as systems get progressively older, according to my own personal and anecdotal experience, the RH reading in the humidistat can become… well, less than optimal over time. I've done some measurements, and sometimes older systems tend do their zig-zaging around a suboptimal RH level, which throws the whole stabilization idea off. I don't know if this might have something to do with our crazy low Finnish indoor RH during jan-feb (usually <20%) and, respectively, crazy high indoor RH during july and august (sometimes >75%), but the RH measurement sensor inside the humidistat seems to get thrown off with increasing age.

    I usually explain the situation to my clients (this problem occurs well after the warranty has expired) and most often they are willing to 1) replace the humidistat controller unit (if it's the newer version), or 2) replace the whole system (if the existing system if of the old kind with hard-wired, unpluggable cables running to the different parts).

    If anybody has had experiences resembling these of mine, or opposite ones, please feel free to confirm or deny.

    Anyways, I would personally leave these units unplugged, FWIW. Just my two cents. 



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    Patrick Wingren
    Jakobstad, Finland
    patrick@wingrenpianistik.fi
    0035844-5288048
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  • 3.  RE: Dampp Chaser situation question

    Posted 19 days ago

    hi Tim,

    hi Tim,

    Great to hear from you- blessings brother.

    Yeah, I swear by these systems and I would answer that question with it depends. It depends on your environment; No matter how careful you are. I find that the value of lock solid levelling in terms of humidity seems to always make a difference, no matter how careful I am

    In my climate controlled shop, for instance, when I bring instruments in to restring and rebuild, I still operate the system in the pianos when I'm working on them. I just find that in my environment here north of Toronto we have a lot of humidity. I like the results I've had installed over 100 of these systems over the years



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    Ian Graham
    Piano Technician
    Instrument Restoration
    www.igraham.ca
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  • 4.  RE: Dampp Chaser situation question

    Registered Piano Technician
    Posted 19 days ago

    Patrick and Ian, thank you for your thoughts! The one system is 18-19 years old, the second is probably 14-15.



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    Tim Foster RPT
    New Oxford PA
    (470) 231-6074
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  • 5.  RE: Dampp Chaser situation question

    Registered Piano Technician
    Posted 19 days ago

    Tim, 

    then I would definitely leave them unplugged. There is simply no way those systems, If they've been in constant use up until now, barring a miracle, would give readings that are accurate enough to further stabilize a very stable environment.

    Again, this is according to my personal experience, but I'm quite confident that this could be backed up scientifically. 15-year-old humidistats just can't be expected to give proper readings.



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    Patrick Wingren
    Jakobstad, Finland
    patrick@wingrenpianistik.fi
    0035844-5288048
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  • 6.  RE: Dampp Chaser situation question

    Posted 19 days ago

    Hi Tim,

    My apologies, I had misread your post. I thought you were considering replacing these aged systems with new ones. I agree with Patrick's comments. 

    Best



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    Ian Graham
    Piano Technician
    Instrument Restoration
    www.igraham.ca
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  • 7.  RE: Dampp Chaser situation question

    Posted 18 days ago

     I too swear by these systems when needed. I don't use old anything. 

    If you're truly maintaining your RH% what's the point? Leave them out. 

    Nice set-up!



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    Vincent Chambers

    Apollo Piano | Stanford
    San Francisco, Chico CA
    (530) 924-4469 Mobile; 732-642-1100
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