Consumer awareness and opinion of heat pumps are both improving, along with the technology. Manufacturers see a strong market ahead, although some challenges remain.

While balanced ventilation does have energy benefits, there is a misconception about its ability to reduce humidity.

As HVAC providers, we have the ability to advise homeowners, builders, and property managers on ways to improve their indoor air quality.

Four core components work together to control when refrigerant is absorbing heat, and when it is releasing heat.

Equipped with an Oilon LN30 ultra-low NOx burner and Nationwide’s Eagle PLC-based Control System, the 250 hp package boiler achieved average emissions performance of 5 ppm NOx and 0 ppm CO (corrected to 3% O₂) during third-party testing.

Posted by Solar Designer on Nov 12

Posted by Clemens Lang on Nov 12

Posted by Joel GUITTET on Nov 12

Hamid Sarshar will lead the 50-year-old company into the next strategic phase of growth and innovation within the UFT platform.

Since they don’t have to stay in one place, portable cooling units have been known to show up in some pretty unique places. Here’s a closer look at how portable units are serving in some outside-the-box applications.

There are things contractors can do to get school equipment back online and ensure it’s operating as efficiently as possible in time for the first school bell this fall.

Every year, The NEWS introduces the latest cooling equipment available for the upcoming summer season in order to help contractors prepare for this busy period by doing the research that will help them to distinguish between brands. The coverage features specific information about each individual product as submitted by the manufacturers.

This heating showcase provides in-depth information on the features of each individual unit and also includes technical support information from the manufacturer. The manufacturers provided all of the data included in the product grid as well as in the photo feature; therefore, any questions should be directed to them via the contact information provided in the photo feature section.

The two donated Airedale ClassMate packaged units were installed in the football team's fieldhouse at Parry McCluer High School in Buena Vista, Virginia.

Posted by John via Snort-sigs on Oct 29

Building automation systems can boost heating and cooling efficiency by more than 20%.

The ESP-400 by Jackson Systems LLC has earned gold in the Residential Controls category of The NEWS’ 2017 Dealer Design Awards.

When it comes to comfort, not much beats zoning. In fact, many industry experts tout that once homeowners have experienced the comfort zoning has to offer, they will never own another house without it.

Over a year of research and design went into the 2018 Dealer Design Awards gold-winning product in the Residential Controls category. After listening to feedback from both contractors and consumers for a more basic, easy-to-use, and cost-effective thermostat, Nest created the Nest Thermostat E.

Dick Foster has been preaching the positives of zoning for years. As the owner of ZoneFirst, he has dedicated his life and career to this technology, and it has been a bit of an uphill battle.

The project team and property management realized they needed to maximize open space for use by hotel guests. They chose LG’s Multi V™ 5 and Multi V™ S VRF systems, noted for energy efficiency and flexibility in design and installation options.

If zoning technology was available before the pandemic, why has it taken so long for it to become an option that homeowners now consider?

In this showcase, The ACHR NEWS introduces the latest cooling equipment available for the upcoming summer season in order to help contractors distinguish between brands.

Hybrid systems offer a pathway that balances environmental concerns with practical considerations, ensuring a more sustainable and feasible transition towards cleaner energy sources.

To meet the ambitious environmental goals being proposed at all levels of government, residential air-to-water heat pumps are emerging as a transformative solution to lower carbon emissions, enhance energy efficiency, and reduce utility bills.

Every year, The ACHR NEWS introduces the latest heating equipment that is available for the upcoming winter season.

Every year, The ACHR NEWS introduces the latest heating equipment that is available for the upcoming winter season.

Cold climate heat pumps were on full display on the AHR show floor and manufacturers were eager to share their progress reports in the Department of Energy’s CCHP Challenge.

The residential heating showcase is designed to help HVAC contractors learn about the new heating equipment that is available for the upcoming cooler months.

The biggest tip is that combustion analysis should be the first and last thing completed during any heating appliance repair.

Due to a lack of training, time constraints, and numerous other reasons, many HVAC contracting companies are not performing combustion testing, potentially compromising customers’ safety.

The residential heating showcase is designed to help HVAC contractors learn about the new heating equipment that is available for the upcoming cooler months.

Posted by Ariel Otilibili on Sep 15

Posted by Ariel Otilibili on Sep 15

Posted by CISA on Mar 21

In this episode we talk with Doug Schmidt. Doug is a professor of computer science at Vanderbilt University and a well-respected authority in the fields of middleware, patterns and model-driven development. In this interview we talk about these topics in the context of distributed, realtime embedded (DRE) systems.

This is another episode on concurrency. We talk to two experts in the field, Brian Goetz and David Holmes about aspects of concurrency we hadn't really covered before. We start out by discussing liveness and safety and then continue to talk about synchronizers (latches, barriers, semaphores) as well as the importance of agreeing on protocols when developing concurrent applications. We then talked about thread confinement as a way of building thread-safe programs, as well as using functional programming and immutable data. The next set of topics covers various ways of how compilers can optimize the performance wrt. to concurrency, talking about techniques such as escape analysis as well as lock elision and coarsening. We then covered how to test concurrent programs and the consequences of the Java memory model on concurrency. We then went on to look at some more advanced topics, namely, lock-free programming and atomic variables. We also briefly discussed the idea of transactional memory. Finally, we looked at how better language support - specifically, a more declarative style of concurrent programming as e.g. in the Fortress language - can aid in improving the quality of concurrent programs.

In this episode, Dirk talks with David Frankel, resident Metamodeller and MDA expert at SAP Labs LLC, SAP's subsidiary in the Silicon Valley. Dave's extensive experience provides a big picture, from the early days of CORBA all the way to current issues that are bugging most enterprise architects' work with MDA.

This episode is part of our series on agile software development. We talk with David Anderson about Kanban, an agile software development method that is quite different from most of the other agile methods out there. We discuss the basic ideas behind Kanban, the differences between Kanban and Scrum and when and why projects can benefit from using Kanban. This episode is done in cooperation with the German magazine ObjektSpektrum (thanks for sharing this interview with us).

In this episode, Robert talks with Nati Shalom about the emergence of large-system architectures consisting of a grid of high-memory nodes.

Recording Venue: WebEx Guest: Lars Vogel Lars Vogel, consultant, Eclipse committer, and owner of vogella.com, gives an overview of the Android operating system. His conversation with Jeff begins with a definition of Android and a brief history. Android is an operating system programmed in Java. It can be found on different types of devices such […]

David Heinemeier Hansson, creator of the Ruby on Rails framework and a partner at the software development company Basecamp, talks to Stefan Tilkov about the state of Ruby on Rails and its suitability for long-term development. He addresses some of its common criticisms, such as perceived usefulness for only simple problems, claimed lack of scalability, and increasing complexity. David also talks about the downsides of building JavaScript-centric, “sophisticated” web UIs, and why he prefers well-structured, “majestic” monoliths to microservices.

Jeff Meyerson talks to Idit Levine about Unikernels and unik, a project for compiling unikernels. The Linux kernel contains features that may be unnecessary to many application developers--particularly if those developers are deploying to the cloud. Unikernels allow programmers to specify the minimum features of an operating system we need to deploy our applications. Topics include the the Linux kernel, requirements for a cloud operating system, and how unikernels compare to Docker containers.

Jeremy Jung talks with David Calavera about zero-downtime migrations and rollbacks with Kubernetes. In this episode we define migrations, rollbacks, and discuss how Netlify was able to migrate to Kubernetes and roll back off of it multiple times without impacting their users. David explains how developers can run old and new systems simultaneously, the importance of defining errors in your system, and when to apply fixes vs rolling back. We also discuss their decision to move to Kubernetes, and the benefits they received.

Felienne talks to Diomidis Spinellis about different forms of debugging. From using print-statements to version-control systems and operating system tools. We also discuss debugging strategies for different types of programming systems.

Heidi Howard, a researcher in the field of distributed systems, discusses distributed consensus. Heidi explains when we need it, when we don't need and the algorithms we use to achieve it.

Berkay Mollamustafaoglu, founder of Ops Genie, discusses the keys to an effective incident management process. Many aspects of incident management are counter intuitive. Why does increasing the rate of change increase uptime? Why is culture the most...

Hadley Wickham, chief scientist at RStudio and creator of the Tidyverse, discusses how R and its data science package the TidyVerse are used and created. Host Felienne speaks with Wickham about the design philosophy of the Tidyverse, and how it supports..

Leonid Shevtsov talks with host Robert Blumen about email protocols and transactional email.