Article:
> The energetic output of an oven stove is 80 to 90 percent, compared to 40 to 50 percent for metal stoves or central heating appliances
Energy.gov
> Old furnaces: 56% to 70%
> Mid efficiency furnaces: 80% to 83%
> High efficiency furnaces: 90% to 98.5%
https://www.energy.gov/energysaver/furnaces-and-boilers
EDIT: We can cut the article some slack as ducting (as typically done) does account for losses which are highly variable.
this article lost me when I saw those numbers. It also treats heat like some kind of magic and not based on thermodynamics. heat is heat, no matter how quickly or slowly it spreads. A big thermal mass will hold heat, but will also take longer to heat in the first place. You're spending the same number of BTUs in the long run.
Tradition has it that when you load-test a new bridge, you put the architect underneath. I feel like this, except I didn't design those driverless cars, somebody else did. Being an experienced software engineer, my trust in the software in these cars is pretty low. And yet they are testing them on me, because I can be the one getting killed.
I think we should set a much higher bar for allowing those cars on the streets, rather than "it kinda works, so let's roll with it".