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Shaping Tomorrow's Built Environment Today
May 29, 2025
Researchers at the University of Nottingham in the UK have demonstrated the feasibility of residential ice-source heat pumps in cold climates and densely populated areas. They designed a heat pump system that uses existing gas pipelines to transport water. Read more
The multitrillion-dollar tax breaks package passed by House Republicans repeals or phases out clean energy tax credits passed in the 2022 Inflation Reduction Act during President Biden’s term while supporting increased mining, drilling and other traditional energy production. A marathon session that stretched from last Wednesday to last Thursday resulted in 1,100-plus page legislation that curbs billions of dollars in spending across food assistance, student loans, Medicaid and action to address climate change. Read more
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Clean air is an essential part of a healthy developmental environment, and ensuring that children and their caregivers have clean air to breathe in all the spaces where they spend time—both indoors and out—is key to supporting long-term health. This working paper explores the many ways air quality impacts the well-being of children and offers solutions for improving indoor air quality. Read more
AI’s energy use already represents as much as 20 percent of global data-center power demand, research published in the journal Joule shows. That demand from AI, the research states, could double by the end of this year, comprising nearly half of all total data-center electricity consumption worldwide, excluding the electricity used for bitcoin mining. Read more
Join ASHRAE Journal Technical Editor Rebecca Matyasovski and Matthew Strebe in this chat about recommissioning a church building to optimize energy efficiency and reduce natural gas consumption.
 
 
Hot Air Podcast: Understanding Mold Problems Inside Housing With George Tsongas
ASHRAE Journal
By Roland Charneux, P.Eng., HFDP, and Yan Ferron, P.Eng.
The objectives were clearly expressed: to design an efficient house that would offer occupants an environment with thermal, visual and acoustical comfort, high indoor air quality and energy efficiency, within a defined construction and life-cycle budget. This 2,400 ft2 (223 m2) net positive house project also had the objective to minimize embodied carbon and be net zero or have net positive energy. The design criteria was not to meet the minimum code performance, but rather to design a house that would be in accordance with the codes at its midlife, which was chosen to be 25 years. Download here
ASHRAE News
Held in Chicago from October 22-24, the 2025 Building Decarbonization Conference will be an information and idea exchange between stakeholders in the built environment industry concerning the reduction of GHG emissions in new and existing buildings and systems. The conference will bring together engineering and technical solution providers with building owners, utility program managers, local governments and financial services providers who are increasingly challenged to meet stringent building decarbonization goals, policies and regulations in a practical, cost-effective manner. Read more
Products
In Case You Missed It
The U.S. heating and cooling industry is highly dependent on overseas manufacturers, both for fully assembled units and for component parts. The U.S. imported more than $15 billion in AC units last year, mainly from Mexico and China. Last week, the Trump administration paused its 145% tariff on China and replaced it with a 30% tariff in the meantime. Now, contractors are reeling from the whiplash of an uncertain manufacturing outlook and dealing with higher expenses across the board due to limited supply. Read more
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