this post was submitted on 12 Mar 2024
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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world. About 1C of total warming. Second chart: about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability. Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases. About 0.5C of cooling with large error bars from SO2.

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Where Heat Pumps Win — And Where They Lose | Five findings from an extremely thorough study by the US National Renewable Energy Lab. (heatmap.news)
submitted 8 months ago by [email protected] to c/[email protected]
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[–] [email protected] 11 points 8 months ago (1 children)

What's new is that heat pumps capable of warming a house in truly cold weather became commercially available in the US

[–] [email protected] 10 points 8 months ago (2 children)

My heat pump does fine at 0F. And has done since the late 80s. And if it can’t it has electric backup heat.

[–] [email protected] 3 points 8 months ago

This has been what's in my house/apartments since I was 8 and first learned about them when ours went out and my grandpa came over to fix it.

Heat pump, with 1-3 rows of coils for electric backup heat. Lowest Temps I've experienced were -20F and highest were 110F. Struggled to cool below 75 at the top, and heat above 60 at the lows. But those are rare extremes (on the low side anyway, I expect the high side to "peak" more often in coming years)

And none of the systems were younger than 2005.

[–] [email protected] 2 points 8 months ago (1 children)

Ground source or air?

[–] [email protected] 3 points 8 months ago

Air. Just a bog-standard midrange heat pump, though it's probably grossly oversized.