Gregory Duncan
@duncanarchitect.bsky.social
Designing comfortable, healthy, energy-efficient buildings
Certified Passive House Designer
Registered Architect in NY and NJ
Certified Passive House Designer
Registered Architect in NY and NJ
Reposted by Gregory Duncan
You probably don't know what SEQRA is - but you should know that it's slowing down the housing that we need. Deputy Mayor Leila Bozorg is here to explain why reforming it is key to cutting red tape and building more housing.
January 14, 2026 at 11:45 PM
You probably don't know what SEQRA is - but you should know that it's slowing down the housing that we need. Deputy Mayor Leila Bozorg is here to explain why reforming it is key to cutting red tape and building more housing.
Reposted by Gregory Duncan
🎓 Attention Students! 🎓
The Passive House Institute is offering #designPH-EDU, a special version of the 3D planning tool, for FREE for one year! This is an amazing opportunity for students to explore the possibilities of energy-efficient building design.
👉https://ow.ly/Ngtc50XMatw
The Passive House Institute is offering #designPH-EDU, a special version of the 3D planning tool, for FREE for one year! This is an amazing opportunity for students to explore the possibilities of energy-efficient building design.
👉https://ow.ly/Ngtc50XMatw
January 16, 2026 at 2:01 PM
🎓 Attention Students! 🎓
The Passive House Institute is offering #designPH-EDU, a special version of the 3D planning tool, for FREE for one year! This is an amazing opportunity for students to explore the possibilities of energy-efficient building design.
👉https://ow.ly/Ngtc50XMatw
The Passive House Institute is offering #designPH-EDU, a special version of the 3D planning tool, for FREE for one year! This is an amazing opportunity for students to explore the possibilities of energy-efficient building design.
👉https://ow.ly/Ngtc50XMatw
Reposted by Gregory Duncan
The Congressional Progressive Caucus, a group of nearly 100 House Democrats, will announce later today that it's formally endorsing legislation to strip $175 billion from ICE and put it toward affordable housing. www.huffpost.com/entry/doj-fe...
Progressive Caucus Backs Bill To Redirect ICE Money To Affordable Housing
www.huffpost.com
January 14, 2026 at 8:00 PM
The Congressional Progressive Caucus, a group of nearly 100 House Democrats, will announce later today that it's formally endorsing legislation to strip $175 billion from ICE and put it toward affordable housing. www.huffpost.com/entry/doj-fe...
Reposted by Gregory Duncan
Governor Hochul will announce an extension of the Second Avenue Subway to 125th and Broadway in her State of the State address on Tuesday. buff.ly/2qxRQs6
Westward Ho! Hochul Proposes to Extend Second Ave. Subway Along 125th Street to Broadway - Streetsblog New York City
The next step for the Second Avenue Subway is west across 125th Street to Broadway, Gov. Hochul will announce Tuesday.
nyc.streetsblog.org
January 13, 2026 at 12:43 PM
Governor Hochul will announce an extension of the Second Avenue Subway to 125th and Broadway in her State of the State address on Tuesday. buff.ly/2qxRQs6
Reposted by Gregory Duncan
🌟 #28intPHC Highlight: “Affordable green living in the centre of the city, including free electricity!” Join the conference to hear Harald Konrad Malzer’s presentation on affordable, climate-friendly housing!
Early-bird tickets until Jan 31! https://passivhaustagung.de/en/conference/
Early-bird tickets until Jan 31! https://passivhaustagung.de/en/conference/
January 12, 2026 at 6:01 PM
🌟 #28intPHC Highlight: “Affordable green living in the centre of the city, including free electricity!” Join the conference to hear Harald Konrad Malzer’s presentation on affordable, climate-friendly housing!
Early-bird tickets until Jan 31! https://passivhaustagung.de/en/conference/
Early-bird tickets until Jan 31! https://passivhaustagung.de/en/conference/
You don’t see many light switches like this anymore
January 11, 2026 at 8:56 PM
You don’t see many light switches like this anymore
Be careful putting furniture up against exterior walls. In this house in Brooklyn, a cabinet blocked the heat, creating the perfect conditions for mold.
January 11, 2026 at 4:56 PM
Be careful putting furniture up against exterior walls. In this house in Brooklyn, a cabinet blocked the heat, creating the perfect conditions for mold.
Found this during a site visit renovating an old house in Ditmas Park, Brooklyn
Hero fire extinguisher spray can
Hero fire extinguisher spray can
January 10, 2026 at 10:55 PM
Found this during a site visit renovating an old house in Ditmas Park, Brooklyn
Hero fire extinguisher spray can
Hero fire extinguisher spray can
Reposted by Gregory Duncan
Are you a manufacturer or vendor of #PassiveHouse components? Or part of a network that promotes #EnergyEfficiency in the building sector?
Showcase your innovations at the upcoming Passive House Exhibition in Essen, Germany, on April 24–25, at the #28intPHC!
https://ow.ly/ceVg50XTyH6
Showcase your innovations at the upcoming Passive House Exhibition in Essen, Germany, on April 24–25, at the #28intPHC!
https://ow.ly/ceVg50XTyH6
January 10, 2026 at 2:00 PM
Are you a manufacturer or vendor of #PassiveHouse components? Or part of a network that promotes #EnergyEfficiency in the building sector?
Showcase your innovations at the upcoming Passive House Exhibition in Essen, Germany, on April 24–25, at the #28intPHC!
https://ow.ly/ceVg50XTyH6
Showcase your innovations at the upcoming Passive House Exhibition in Essen, Germany, on April 24–25, at the #28intPHC!
https://ow.ly/ceVg50XTyH6
Yeah what did it for me was when he said he was going to build affordable housing using bricks made from dirt excavated from hyperloop tunnels
The great thing about being a transit nerd is that I’ve never respected Elon Musk
January 10, 2026 at 2:52 PM
Yeah what did it for me was when he said he was going to build affordable housing using bricks made from dirt excavated from hyperloop tunnels
Germany’s biggest property manager now allowing tenants to install plug-in balcony solar panels.
When we legalize balcony solar in the US we need to ensure tenants have the same rights to install that they do for satellite dishes.
When we legalize balcony solar in the US we need to ensure tenants have the same rights to install that they do for satellite dishes.
Nach monatelangem Rechtsstreit gibt Deutschlands größter Vermieter den Widerstand gegen eine Mini-Solaranlage auf und ermöglicht einen wichtigen Präzedenzfall. #Balkonkraftwerk
Ende der Blockadehaltung: Vonovia knickt bei Balkonkraftwerk ein
Nach monatelangem Rechtsstreit gibt Deutschlands größter Vermieter den Widerstand gegen eine Mini-Solaranlage auf und ermöglicht einen wichtigen Präzedenzfall.
www.heise.de
January 8, 2026 at 9:00 PM
Germany’s biggest property manager now allowing tenants to install plug-in balcony solar panels.
When we legalize balcony solar in the US we need to ensure tenants have the same rights to install that they do for satellite dishes.
When we legalize balcony solar in the US we need to ensure tenants have the same rights to install that they do for satellite dishes.
Reposted by Gregory Duncan
Another US state following the example of Utah trying to make #BalconySolar legal!
California do it!!
California do it!!
January 6, 2026 at 9:07 PM
Another US state following the example of Utah trying to make #BalconySolar legal!
California do it!!
California do it!!
This probably influenced the practice of overheating New York apartments so that you could sleep with a window open
Vent piping is more important than fire escapes, according to this article printed in the NYT in 1875, just a few years before NYC mandated trap venting for all new construction.
PROTECTION FROM SEWER-GAS. (Published 1875)
www.nytimes.com
January 6, 2026 at 7:36 PM
This probably influenced the practice of overheating New York apartments so that you could sleep with a window open
Window comes from an Old Norse word meaning “wind eye”.
BTW the OED has the craziest US English pronunciation for it
www.oed.com/dictionary/w...
BTW the OED has the craziest US English pronunciation for it
www.oed.com/dictionary/w...
Oxford English Dictionary
The OED is the definitive record of the English language, featuring 600,000 words, 3 million quotations, and over 1,000 years of English.
www.oed.com
January 6, 2026 at 5:23 PM
Window comes from an Old Norse word meaning “wind eye”.
BTW the OED has the craziest US English pronunciation for it
www.oed.com/dictionary/w...
BTW the OED has the craziest US English pronunciation for it
www.oed.com/dictionary/w...
Reposted by Gregory Duncan
🌟 #28intPHC Highlight: “Paseo Passiveana 19, Madrid - a difficult story” Join the conference and listen Micheel Wassouf’s presentation about retrofitting protected buildings with interior insulation!
Early-bird tickets until Jan 15! https://passivhaustagung.de/en/conference/
Early-bird tickets until Jan 15! https://passivhaustagung.de/en/conference/
January 4, 2026 at 6:00 PM
🌟 #28intPHC Highlight: “Paseo Passiveana 19, Madrid - a difficult story” Join the conference and listen Micheel Wassouf’s presentation about retrofitting protected buildings with interior insulation!
Early-bird tickets until Jan 15! https://passivhaustagung.de/en/conference/
Early-bird tickets until Jan 15! https://passivhaustagung.de/en/conference/
Reposted by Gregory Duncan
In celebration of Mamdani's first day in office, the map from our 2016 NYC atlas celebrating Queens as the most linguistically diverse place on earth. (800 languages spoken in NYC, according to NY's Endangered Language Institute, which collaborated with us on this map.
January 3, 2026 at 3:21 AM
In celebration of Mamdani's first day in office, the map from our 2016 NYC atlas celebrating Queens as the most linguistically diverse place on earth. (800 languages spoken in NYC, according to NY's Endangered Language Institute, which collaborated with us on this map.
Passive House is not just for houses.
Indoor swimming pools also benefit from the green building standard
Indoor swimming pools also benefit from the green building standard
Passivhaus-Hallenbäder sparen in erheblichem Umfang #Energie und Betriebskosten ein. Entlastung für #Kommunen.
Beispiel: Rutsche IN die thermische Hülle!
Fachwissen digital & gebührenfrei:
passiv.de/de/05_serv...
Fotos: Passivhaus-Schwimmbad #Bambados in #Bamberg, © #Passivhaus Institut
Beispiel: Rutsche IN die thermische Hülle!
Fachwissen digital & gebührenfrei:
passiv.de/de/05_serv...
Fotos: Passivhaus-Schwimmbad #Bambados in #Bamberg, © #Passivhaus Institut
January 2, 2026 at 1:47 PM
Passive House is not just for houses.
Indoor swimming pools also benefit from the green building standard
Indoor swimming pools also benefit from the green building standard
Reposted by Gregory Duncan
Has anyone done this yet
January 1, 2026 at 3:51 PM
Has anyone done this yet
December 2025
Plasterwork and painting is almost complete.
Plasterwork and painting is almost complete.
December 31, 2025 at 9:12 PM
December 2025
Plasterwork and painting is almost complete.
Plasterwork and painting is almost complete.
November 2025
Parents came for Thanksgiving and we got to see the Ruth Asawa show at MoMA
Parents came for Thanksgiving and we got to see the Ruth Asawa show at MoMA
December 31, 2025 at 9:08 PM
November 2025
Parents came for Thanksgiving and we got to see the Ruth Asawa show at MoMA
Parents came for Thanksgiving and we got to see the Ruth Asawa show at MoMA
October 2025
Another house in Ditmas Park, Brooklyn. First floor had been divided into two with an office space and residence in the 1950s.
Another house in Ditmas Park, Brooklyn. First floor had been divided into two with an office space and residence in the 1950s.
December 31, 2025 at 9:01 PM
October 2025
Another house in Ditmas Park, Brooklyn. First floor had been divided into two with an office space and residence in the 1950s.
Another house in Ditmas Park, Brooklyn. First floor had been divided into two with an office space and residence in the 1950s.
September 2025
Celebrating Oktoberfest, watching the Steuben Day Parade on 5th Ave.
Celebrating Oktoberfest, watching the Steuben Day Parade on 5th Ave.
December 31, 2025 at 8:48 PM
September 2025
Celebrating Oktoberfest, watching the Steuben Day Parade on 5th Ave.
Celebrating Oktoberfest, watching the Steuben Day Parade on 5th Ave.
August 2025
Brooklyn kitchen during renovation. We used Sonopan recycled wood fiberboard from Canada for acoustic isolation from the bathroom above.
Brooklyn kitchen during renovation. We used Sonopan recycled wood fiberboard from Canada for acoustic isolation from the bathroom above.
December 31, 2025 at 8:40 PM
August 2025
Brooklyn kitchen during renovation. We used Sonopan recycled wood fiberboard from Canada for acoustic isolation from the bathroom above.
Brooklyn kitchen during renovation. We used Sonopan recycled wood fiberboard from Canada for acoustic isolation from the bathroom above.
July 2025
IR camera shows air leaks from the window hardware at a house upstate. Client had some problems with drafts and overheating and brought us in to find solutions.
IR camera shows air leaks from the window hardware at a house upstate. Client had some problems with drafts and overheating and brought us in to find solutions.
December 31, 2025 at 8:32 PM
July 2025
IR camera shows air leaks from the window hardware at a house upstate. Client had some problems with drafts and overheating and brought us in to find solutions.
IR camera shows air leaks from the window hardware at a house upstate. Client had some problems with drafts and overheating and brought us in to find solutions.