Addison Killean Stark
@addisonkstark.bsky.social
Clean Industrialist | Chief Boilermaker AtmosZero | Advisor to Starlight Ventures & Avila VC
Waste heat isn’t “free.” Capturing, moving, and upgrading it adds cost and complexity—making every project custom. That kills scalability.
We need air-sourced, factory-built heat pumps: modular, repeatable, and fast to deploy.
We need air-sourced, factory-built heat pumps: modular, repeatable, and fast to deploy.
October 6, 2025 at 3:28 PM
Waste heat isn’t “free.” Capturing, moving, and upgrading it adds cost and complexity—making every project custom. That kills scalability.
We need air-sourced, factory-built heat pumps: modular, repeatable, and fast to deploy.
We need air-sourced, factory-built heat pumps: modular, repeatable, and fast to deploy.
Industrial heat pumps are critical for electrifying industry—but decades of chasing waste heat have kept them stuck in bespoke, non-scalable projects.
It’s time to rethink the path forward. 🧵👇
It’s time to rethink the path forward. 🧵👇
October 6, 2025 at 3:28 PM
Industrial heat pumps are critical for electrifying industry—but decades of chasing waste heat have kept them stuck in bespoke, non-scalable projects.
It’s time to rethink the path forward. 🧵👇
It’s time to rethink the path forward. 🧵👇
4th of July Parade.
Anytown, U.S.A.
Anytown, U.S.A.
July 4, 2025 at 6:38 PM
4th of July Parade.
Anytown, U.S.A.
Anytown, U.S.A.
Porting bangers over from Twitter
June 30, 2025 at 1:27 PM
Porting bangers over from Twitter
Another day of boring 24/7 boiler operation at a customer site.
It ain’t much, but it’s honest work.
#EnergySky #IndustrialDecarb #Climatetech #Startups
It ain’t much, but it’s honest work.
#EnergySky #IndustrialDecarb #Climatetech #Startups
June 28, 2025 at 12:10 AM
Another day of boring 24/7 boiler operation at a customer site.
It ain’t much, but it’s honest work.
#EnergySky #IndustrialDecarb #Climatetech #Startups
It ain’t much, but it’s honest work.
#EnergySky #IndustrialDecarb #Climatetech #Startups
Between steel tariffs, Canadian import tariffs and OPEC pushing down global prices, it’s been a tough week for American Energy Dominance.
March 5, 2025 at 2:32 PM
Between steel tariffs, Canadian import tariffs and OPEC pushing down global prices, it’s been a tough week for American Energy Dominance.
On a cold Colorado morning the AtmosZero team turned on Boiler 2.0 and happened to do something that has never been done before.
All in a day's work.
#EnergySky
All in a day's work.
#EnergySky
February 21, 2025 at 7:40 PM
On a cold Colorado morning the AtmosZero team turned on Boiler 2.0 and happened to do something that has never been done before.
All in a day's work.
#EnergySky
All in a day's work.
#EnergySky
Now we're cookin'.
Thrilled to see my former ARPA-E colleague and friend, Conner Prochaska, tapped to lead the agency.
Thrilled to see my former ARPA-E colleague and friend, Conner Prochaska, tapped to lead the agency.
February 4, 2025 at 8:50 PM
Now we're cookin'.
Thrilled to see my former ARPA-E colleague and friend, Conner Prochaska, tapped to lead the agency.
Thrilled to see my former ARPA-E colleague and friend, Conner Prochaska, tapped to lead the agency.
I mean this is fine. “Resilience” speaks more to action than the passive “change”.
February 1, 2025 at 5:36 PM
I mean this is fine. “Resilience” speaks more to action than the passive “change”.
And as some more backing for second point (no need for heat pumps above ~225C)… that’s where thermal storage like Rondo/Antora/ETS/etc really start to emerge as the key competitor and winner above 300C. With conservative e- price assumption thermal storage beats HP due to low COP at that temp
January 24, 2025 at 9:55 PM
And as some more backing for second point (no need for heat pumps above ~225C)… that’s where thermal storage like Rondo/Antora/ETS/etc really start to emerge as the key competitor and winner above 300C. With conservative e- price assumption thermal storage beats HP due to low COP at that temp
Apologies for the self-reference to what we do at AtmosZero, but this below chart should shed some light on this issue…
TLDR: Very little need for heat pumps above 200C. The higher the delivery temp the lower the COP. The higher the CapEx:COP ratio the less likely that it’ll play a role.
TLDR: Very little need for heat pumps above 200C. The higher the delivery temp the lower the COP. The higher the CapEx:COP ratio the less likely that it’ll play a role.
January 24, 2025 at 9:51 PM
Apologies for the self-reference to what we do at AtmosZero, but this below chart should shed some light on this issue…
TLDR: Very little need for heat pumps above 200C. The higher the delivery temp the lower the COP. The higher the CapEx:COP ratio the less likely that it’ll play a role.
TLDR: Very little need for heat pumps above 200C. The higher the delivery temp the lower the COP. The higher the CapEx:COP ratio the less likely that it’ll play a role.
Torn between being excited to see thermodynamics in the lede and going off on a rant of “well technically thermodynamics is only useful to describe equilibrium systems, of which a cast iron over heat decidedly is not…”
December 27, 2024 at 9:32 PM
Torn between being excited to see thermodynamics in the lede and going off on a rant of “well technically thermodynamics is only useful to describe equilibrium systems, of which a cast iron over heat decidedly is not…”
A Colorado Christmas
December 26, 2024 at 1:42 AM
A Colorado Christmas
From our factory to yours, Happy Holidays and an Electrified New Year!
December 24, 2024 at 3:03 PM
From our factory to yours, Happy Holidays and an Electrified New Year!
He’s m’boy alright.
December 23, 2024 at 2:50 AM
He’s m’boy alright.
AtmosZero after dark
December 21, 2024 at 1:11 AM
AtmosZero after dark
Quite the dust-up online about planning for 10% natural gas back-up to enable low cost off-grid solar data centers.
Just wait until the purists hear about how much NG and other fossil inputs will remain in a post-net-zero industrial sector…
Great and thoughtful report.
Just wait until the purists hear about how much NG and other fossil inputs will remain in a post-net-zero industrial sector…
Great and thoughtful report.
December 20, 2024 at 3:28 PM
Quite the dust-up online about planning for 10% natural gas back-up to enable low cost off-grid solar data centers.
Just wait until the purists hear about how much NG and other fossil inputs will remain in a post-net-zero industrial sector…
Great and thoughtful report.
Just wait until the purists hear about how much NG and other fossil inputs will remain in a post-net-zero industrial sector…
Great and thoughtful report.
At Rocky Mountain National Park
December 14, 2024 at 7:31 PM
At Rocky Mountain National Park
Climatetech founders RN
December 11, 2024 at 11:01 PM
Climatetech founders RN