GreyEyedGhost

You just change the definition of your isolated system. It takes less energy to move heat from one place to another than it does to excite matter to release energy. For resistive or combustion heating, the isolated system is your house, plus the gas if using gas heat. For heat pumps, you include the rest of the world.

As an aside, heat pumps are generally considered good when they reach 300% efficiency, i.e., when every watt of energy expended adds 3 watts of heat to your home.

This is no longer correct. We have heat pumps that can be more than 100% efficient, even air-sourced heat pumps in -30° weather. There are still many places where this will still be more expensive than a gas furnace.

This picture is worth at least 4 words.

A single point of data rarely answers the question unless you’re looking for absolutes. “Will zipping 10 files individually be smaller than zipping them into a single file?” Sure, easy enough to do it once. Now, what kind of data are we talking about? How big, and how random, is the data in those files? Does it get better with more files, or is the a sweet spot where it’s better, but it’s worse if you use too few files, or too many? I don’t think you could test for those scenarios very quickly, and they all fall under the original question. OTOH, someone who has studied the subject could probably give you an answer easily enough in just a few minutes. Or he could have tried a web search and find the answer, which pretty much comes down to, “It depends which compression system you use.”

The Pebble Time 2 has a heart rate monitor. I can’t say if the rest of your statement is correct or not.