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Screenshot from the movie "Annihilation"? (Which I thought was awesome, BTW) :lol_hitti

I am not 100% sure what was used. The homeowner said "fiberglass". I did a garage ceiling (living space above) and used fiberglass above a fine netting, before drywall. You could hear it change as the void filled up. I'm sure that there's all kinds of little technical issues with this...

There is. Low expansion or retrofit foam. I want to have it done, but it isn't cheap. Estimate was ~5k a couple of years ago for a 1400sf ranch. They claim to be able to do it from outside and pull off one piece of siding around the perimeter. I have partial stone in front, and they said that...

Ok, but why can't I bring a propane cylinder for a grill into a store? Especially if the store has smaller one use propane cylinders on the shelf, and pallets of flammable paints and other solvents?

Sure, but a system that does not contain a flammable refrigerant won't ignite if there is a leak+spark. Or, am I missing something here?

New R454B equipment has a sensor* in the evaporator coil, and it's either wired to a board or plugged into a board that turns on the circulating fan if the sensor detects anything. The sensor does not indicate a loss of refrigerant to the user. Given several pounds of refrigerant in a...

Sounds fishy to me. A quick search is showing a range of 3.0-4.0 COP for air source heat pumps, and the COP will go down as temperature goes down. A COP of 7.0 when it is 70 degrees outside, and you are trying to maintain 71 inside is probably pretty much useless. I think.

Memory is probably off a bit, but I believe it has something to do with the locked rotor amps rating of the compressor. The wiring has to carry that current safely and requires a correctly sized break.

No.

That seller has an easy $50k+ in other listings on that page.

The manufacturer claims over 20k btu heat output at -5 F outside and 70 F inside. There is a spec sheet in the product link in Post 55.

It would still be worth a call to the CC company if there is an email trail.

It really comes down to what the load calculation is for the space, and then if whatever piece of equipment that you choose has at least that many btu's of rated output at the design temperature.

OMF'NG 😁

Then he is stuck with what he is doing with an angle grinder or some of the other stuff I mentioned. IMHO, trying to hold the cut line with double cuts will be too difficult to finish perfect. Not that it *can't* be done, but for those that haven't tried it... you are in for a surprise. A...

What do you mean by "flat"? Outside to inside? Or the cut line along the circumference?

Or extra safe.

Why? You just did. 😁

Although the quote doesn't specify it, the other heights reference an outdoor elevation. I would assume that the 3" is for a wholly indoor application. But assumptions are dangerous in interpretation of building code.

This has more to do with CO and diesel particulates than flammability. Noise from the mechanical room can also be a consideration. Forced entry through the louver. Diesel particulates will quickly build up on condenser coils and air filters.