Whole room humidity control better than Dampp Chaser. ( Right?)

[Farrell]

I thought the implication was pretty clear that the lid would have to be closed, not half open. And admittedly, even a closed lid leaves that 1/4-inch or so gap all the way around the rim. I would imagine that a string cover with closed lid would work well. Just because many folks would leave the lid half open doesn't mean a closed lid with string cover wouldn't work quite well. I keep my lid closed most of the time.

Terry Farrell
  ----- Original Message ----- 
  From: Greg Newell 
  To: 'Pianotech List' 
  Sent: Monday, February 18, 2008 3:54 PM
  Subject: RE: Whole room humidity control better than Dampp Chaser. ( Right?)


  Terry,

                  That all sounds good and all but it doesn't hold up with what I see in the field. I completely agree that it will have a positive effect with a string cover or blanket but I have not seen it deter rust or oxidation with only the lid as the insulator. I'm not saying it wouldn't in a situation where the entire lid was in use but we all know that the vast majority of the time the half lid is left open.

   

  Greg Newell

  Greg's Piano Forté

  www.gregspianoforte.com

  216-226-3791 (office)

  216-470-8634 (mobile)

   

  From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Farrell
  Sent: Monday, February 18, 2008 3:18 PM
  To: Pianotech List
  Subject: Re: Whole room humidity control better than Dampp Chaser. ( Right?)

   

  The heating rods on the DC system heat the air beneath the soundboard. The warm air under the soundboard will tend to stay there if undisturbed because warm air rises (it's less dense). That warm air will in turn warm the soundboard. The soundboard will warm the air above it (like where the strings are). If there is some type of air movement restriction in close proximity to and above the strings (like a lid), or some type of insulation (like a string cover or a blanket over the entire piano), then some of that heated air will remain in the string environment. The warmed air will have a lower relative humidity level than the rest of the room, thus helping to reduce string corrosion.

   

  Terry Farrell

    ----- Original Message ----- 

     

                    I also agree with you! This does, however, morph from the original point of what the DC unit does or does not do. I agree that a string cover will help with the rusty strings issue. I don't believe that the DC unit will help with same.

     

    Greg Newell
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