Means 5 speakers 1 subwoofer.

Makes sense. I wonder how far up the chimney it runs though. Also it doesn't seem to be spreading, if that means anything. It's been like a this for a few months now

For the /r/DIY content, you can get RCA plugs that unscrew the shell and you can solder speaker wire on them. https://www.jameco.com/z/JR1625BLK-Jameco-ValuePro-Black-Plastic-RCA-Plug-Pack-of-5-_229921.html

Parents have a gas fireplace, and my dad always just used the gas to start the fire. Boy Scouts taught me there is a better way!

Mold needs water to thrive. If there was a water issue in past, the dormant spores could be visible.

Only way to remove is warm soapy water and elbow grease. Bleach just shocks them into dormant state but could come back with more water/humidity. Mold doesn't always smell.

I would add one of those humidity checkers to the area and check how it compares to.other part of the house. If it's damp in there probably still leaking. GL

Correct they are sized (amp rating) to allow for inrush current on the entire panel but this person is adding a 60 amp circuit for a charger thats going to be drawing 50 amps. Add in all appliances and other devices in the house plus 2 ac units.

Breakers can handle inrush current of startup for a split second period of time. The two ac units, if starting up at the exact time could cause it to trip. It does happen, albeit not all the time. The 5-7 times the rated amperage is based off the nameplate data of the ac unit, not the breaker. Dont know how you thought i meant that.

I dont know what your point was other than to try to say I dont know what Im talking about. Sounds like you know enough to be dangerous.

I don't really care about that. More of a health concern

Wouldn't mold smell? I have a very strong sense of smell but there's no musty smell around this.

The discoloration may be permanent even if spores are gone

It used to have a leak, not sure for how long as I bought the place last year. The crown was leaking. The flashing was okay.

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Is that what 5.1 means?

This is completely incorrect. Breakers are rated/sized to allow for this. And it’s not 6/7 times, you rate the breaker 250% of rated load, for most motors.

You need to jungle a few circuit around. Breaker 7&15 paired up on a tandem and 8,20 on a tandem breaker. Then that frees up two spots, which you will have to juggle around to get them next to each other, then add a 2pole whatever for a sub panel. Then go from there. As an electrician, I f’in hate arc faults, at least gen 1, these look like gen 3, but they are code. Also something you may want to bring up to your builder and you electrical authority, when installing a new panel, it is required to leave two spare circuit spots (next to each other) by code (in Ontario). If this is code in your area, then they will have to do the work. That’s the route I would go first. But if that doesn’t work do what I mentioned above.

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Seems like a non issue to me

You need to get a connector cable that has one plug that goes into the back and on the other end has a double slot plug in for both of your banana plugs and maybe some bigger gauge speaker wire. I will put a link to one

Ventless fireplaces are dumb. I installed a direct vent gas fireplace about 15 years ago to replaced a ventless model. It provides a ton of heat with no need to open windows or funky smells like the old one had. When we've had power outages it is capable of keeping our entire first floor warm.

OP, I was going to say that I don’t think it’s mold, because I don’t think mold can grow on concrete, but apparently it can! And it does kinda look like that when it does. Search for leaks. Check to see if you have a dead valley at your chimney. If so, you need to install cricket flashing.

You could always just build a fire in your fireplace. Even if it was mold, I suspect that that would handle the issue pretty easily.

Save some space and go 40amp

..... If you leave a dirty peice of bread out, something will take. You have to taste it to be sure.

Well yes, but it's probably better just to change the fuel source.

What else could it be? It can be wiped off with a piece of cloth. I'll try with bread.

Wipe some fresh bread on it and see if it takes, but I agree with your sweep.