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Hello everyone,

I just bought a new house and now I finally some room (and money) to buy my dream upright piano, the Yamaha U1.

The thing is, the house is not very big, I would have no other choice but to put it at one specific place in the living room (see the linked picture: https://ibb.co/ftt3SG6).
I have read online that you shouldn't put your piano on an exterior wall nor beside a fan because of the temperature/humidity variations, although what you see on the picture is not a fan but a heat pump that I could position so that the air doesn't go directly on the piano (I don't know if it changes something). Also take in consideration that I live in Canada and our winters sure tend to be cold.


Knowing all this, my question is, it is very concerning to still choose to put it here, since I don't have any other place? If the answer is yes, is there any thing I could do to limit the temperature/humidity fluctuations?

Thanks in advance!

Last edited by Nicolas J.; 06/23/21 01:41 PM.
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It depends on how good the insulation is. But in any case, you have to live with what you have to live with.


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As BDB says, as long as the wall is well insulated for both winter and summer.No you cannot have any warm air blowing on your piano.Wood parts including soundboard and bridges could crack.It would shorten the life of your piano.
If the wall is not well insulated perhaps you could keep the back of the piano covered.By the way buy a cheap digital hygrometer to keep an eye on humidty changes.


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So you would have the piano directly underneath the AC/heating unit up on the wall, the mini-split? Can you set the blades to that they point directly outward (horizontal) and have the fan speed at the very lowest setting? It might be ok, but then would your room be too cold?

I think the concern for you will be that in the winter, the room will be very dry, so what can you do to mitigate that? Is there a piano dealer in your city? They would be the best place to ask because they will have specific advice that fits the local climate.

Also, is there really no other wall the piano could go on? I'm not worried about the outside wall so much as I am about that mini-split unit. What is on the wall directly opposite the wall in the photo?


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If the wall is well insulated and you keep the piano 4-6” out from the wall you should be okay. This assumes you run a humidifier as necessary and the wall mounted mini-split is set to direct the air straight out into the room.

Our home has had an acoustic piano on an outside wall for over 50 years without any trouble. We know the wall is well insulated and has good airflow between the piano and wall.


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Originally Posted by KSCardinal
If the wall is well insulated and you keep the piano 4-6” out from the wall you should be okay. This assumes you run a humidifier as necessary and the wall mounted mini-split is set to direct the air straight out into the room.

Our home has had an acoustic piano on an outside wall for over 50 years without any trouble. We know the wall is well insulated and has good airflow between the piano and wall.

I forgot to say that I don’t think the mini-splits fan speed would be a factor as long as the directional fins are fixed in a straight out fashion. I’m assuming that the unit only provides heat due to your location. Heated air being less dense tends to stay high in the room and slowly move downward as opposed to falling quickly directly on the piano.


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Originally Posted by tre corda
As BDB says, as long as the wall is well insulated for both winter and summer.No you cannot have any warm air blowing on your piano.Wood parts including soundboard and bridges could crack.It would shorten the life of your piano.
If the wall is not well insulated perhaps you could keep the back of the piano covered.By the way buy a cheap digital hygrometer to keep an eye on humidty changes.

I already have an hygrometer, humidity these days stays around 50%, which is good I think. I'll have to see if it doesn't get too dry during the winter, which in this case I can always buy a humidifier.

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Originally Posted by ShiroKuro
So you would have the piano directly underneath the AC/heating unit up on the wall, the mini-split? Can you set the blades to that they point directly outward (horizontal) and have the fan speed at the very lowest setting? It might be ok, but then would your room be too cold?

I think the concern for you will be that in the winter, the room will be very dry, so what can you do to mitigate that? Is there a piano dealer in your city? They would be the best place to ask because they will have specific advice that fits the local climate.

Also, is there really no other wall the piano could go on? I'm not worried about the outside wall so much as I am about that mini-split unit. What is on the wall directly opposite the wall in the photo?

Yes, directly underneath and yes I can set the air to go horizontally. I think I can always buy a humidifier if it gets too dry. Trust me I have checked every place in the house and no where else would be a good place, it would either be in the basement (good luck managing humidity), in the way, too close to an outside door or blocking a window...

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Originally Posted by KSCardinal
Originally Posted by KSCardinal
If the wall is well insulated and you keep the piano 4-6” out from the wall you should be okay. This assumes you run a humidifier as necessary and the wall mounted mini-split is set to direct the air straight out into the room.

Our home has had an acoustic piano on an outside wall for over 50 years without any trouble. We know the wall is well insulated and has good airflow between the piano and wall.

I forgot to say that I don’t think the mini-splits fan speed would be a factor as long as the directional fins are fixed in a straight out fashion. I’m assuming that the unit only provides heat due to your location. Heated air being less dense tends to stay high in the room and slowly move downward as opposed to falling quickly directly on the piano.

I think the walls are well insulated, as well as the windows, they're not really old and no signs of leaking air, moisture/moss. To answer your question, the mini-split produces heat or A/C, but I never liked to use A/C except during intense heatwaves (yes, it can sometimes happens here in Canada, trust me!)

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Since you don't have another location option (which I totally understand!) then go with that spot, and just set the mini-split direction horizontal.

I think you should be fine as long you monitor it. You may find that you need a humidifier in the winter when it's very cold.

But the U1 is a great piano and super resilient, I bet it will be fine.

My first acoustic piano was a (used) U1. I loved that piano so much!!

Good luck and keep us posted! smile


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From what I can fathom, the "exterior wall" concern for pianos was true in much older construction. Modern buildings with insulation in the walls (I'm talking about the U.S.) shouldn't pose much of a worry about temperature extremes near the exterior walls.


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Originally Posted by MiddleA
From what I can fathom, the "exterior wall" concern for pianos was true in much older construction. Modern buildings with insulation in the walls (I'm talking about the U.S.) shouldn't pose much of a worry about temperature extremes near the exterior walls.

Exactly, with modern homes this is not an issue anymore.


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my upright piano is on an outside wall and has no problems. My tuner says it's in great condition and it doesn't get out of tune quickly. HOWEVER, my house has thick brick walls, if that matters. It also is not next to a window and is not near any heat/AC vent. In fact, there is one behind it but I closed it off.

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Originally Posted by Learux
Originally Posted by MiddleA
From what I can fathom, the "exterior wall" concern for pianos was true in much older construction. Modern buildings with insulation in the walls (I'm talking about the U.S.) shouldn't pose much of a worry about temperature extremes near the exterior walls.

Exactly, with modern homes this is not an issue anymore.

This is good to know. I have been suspecting this for a while.

My walls do get cold starting October but it sort of gently stabilizes to a little below the set indoor temperature. It's certainly not an extreme cold or variation from ambient. The change is also not a sudden, abrupt drop. Vice-versa for springtime.


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