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Joined: May 2001
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I'm finally getting around to installing a Dampp Chaser system in my own piano (hey, paying customers come first).

My piano is a Estonia L-190 (6'3").

What wattage would you recommend for the primary dehumidifier?
I have a bunch of Dampp Chasers on hand including 3' models in 15W, 38W, and 50W.

I live in southwest Maine (Cornish).

Which one would you use?


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Greetings,
for that size piano, an average near 65 watts would be the normal manufacturer kit. If you want to be conservative, the 15 and 38 watt bars may do the job. if you have a lot of summer humidity, maybe the 38 and the 50. If you want to start in the middle, 15 and 50 watt combo. The modern humidistats are much better than the original control boxes, so the amount of wattage will do more to determine how often they are on than how much effect they have.
Regards,

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Hi Frank,

I'm certainly no Dampp Chaser expert, but I'm thinking (based on my HVAC training) that the different wattage units mostly pertain to the wattage or heat/BTU output of the heating rods, which would be the highest source of power consumption; I doubt the small humidifying heating rod uses much electrical energy, whereas the dehumidifying heater bars will use a lot.

There is a correlation between wattage and BTU output (1 watt = 3.412 BTUs of heat energy).

Next, I'm thinking the different wattage units would directly correlate to the size of the piano soundboard, and the level of humidity surrounding the piano; but it's just speculation on my part.

Based on the size of your Estonia grand, and your geographical area, I'm thinking the mid-sized wattage unit (38 watt) would suffice.

Maybe a Dampp Chaser tech or expert will chime in with more precise info.

Good luck!

Rick

Oops! I see Ed Foote posted while I was typing... so, forget everything I said. smile


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Start with the 38w - it's easy enough to swap them out later should you decide you need more or less. Monitor the pitch of the piano and it will tell you how you're doing. Up here grand PLS systems definitely need extra help in the form of a string or fitted cover to help maintain the micro-climate.


Mark Dierauf, RPT
NH Pianos
Piano technician & rebuilder since 1978
www.nhpianos.com

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