re: Hard Rock Hotel looks to be on fire....

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Hard Rock Hotel looks to be on fire.

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Burn bitch burn..... whoo hoo hoo......

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I've never understood this. An AC system sucks air from inside the space, and blows that same cooled air back into the space. What the hell is turning off the AC going to do??

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All AC systems have fresh air makeup and exhaust. Large systems have dedicated manifolds that mix fresh air in with the recirculated air at the air handler. They have an actual duct, likely with a motorized damper and sensors to adjust the damper, connected directly to the outside of the conditioned space envelope sized to bring the proper amount of air in for indoor air quality. Very large buildings may also have a dedicated exhaust system that is very similar in construction, but dumps conditioned air from inside the building out to get rid of any contaminants. This adds complexity and expense to a system.

Smaller home systems rely on the building and AC system being a little leaky and air being drawn into the lower pressure parts of the system (and pushed out of the higher pressure parts of the system for exhaust) through the leaks. Their requirements for fresh air and exhaust are much lower (because they have a much lower volume inside) and the surface area per unit volume is much higher than in a larger building, so there's more leaky area available for every cubic foot than there is in a large building. Because of this geometry, the leakage is generally sufficient to meet the fresh air and exhaust needs of a smaller building as opposed to a larger building where leakage typically isn't enough and the building may require the fresh air makeup and exhaust manifolds.

If you turn the air handler off in a home system, the fan is no longer creating the lower and higher pressure areas, the pressures equalize, and air leakage across the conditioned envelope is reduced or stopped.

We don’t need no water let this mother fricker burn

antifa in NO?

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All AC systems have fresh air makeup and exhaust. Large systems have dedicated manifolds that mix fresh air in with the recirculated air at the air handler. They have an actual duct, likely with a motorized damper and sensors to adjust the damper, connected directly to the outside of the conditioned space envelope sized to bring the proper amount of air in for indoor air quality. Very large buildings may also have a dedicated exhaust system that literally dumps conditioned air from inside the building out to get rid of any contaminants. This adds complexity and expense to a system.

Smaller home systems rely on the building and AC system being a little leaky and air being drawn into the lower pressure parts of the system (and out of the higher pressure parts of the system for exhaust) through the leaks. Their requirements for fresh air and exhaust are much lower (because they have a much lower volume inside) and the surface area per unit volume is much higher than in a larger building, so there's more leaky area available for every cubic foot than there is in a large building. Because of this geometry, the leakage is generally sufficient to meet the fresh air and exhaust needs of a smaller building where it isn't in a large building that may require the fresh air makeup and exhaust manifolds.

If you turn the air handler off in a home system, the fan is no longer creating the lower and higher pressure areas, the pressures equalize, and air leakage across the conditioned envelope is reduced or stopped.

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Thank you sir... now I understand!

I love the mix of hash tags on Twitter. It is easy to pick out the optimists and the pessimists. One uses #HardRock the other uses #HardRockCollapse.

Someone told me that more than two were recovered. Now, I do not believe that to be true. I mean there is no way that would not have been reported, right?

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What's burning to make that dark, dark gray smoke?

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absentee voting Trump ballots.