When paired with heat pumps, air handlers are a great all-electric and sustainable option.

Can the type of ultraviolet light known as UV-C light kill the novel coronavirus? Manufacturers are not making that claim … yet.

The condenser is the most underrated component in an air conditioning or refrigeration system.

ServiceTitan software is a platform where residential HVAC, plumbing, and electrical businesses can access everything from call bookings, customer experience ratings, dispatching, marketing campaigns, and financing options for customers.

As business owners start preparing their companies to withstand the increased volume of business, it’s imperative they do the same with their fleets.

The first phase took effect on January 1, 2018, and increased the minimum efficiency of commercial rooftop units (RTUs) by about 13 percent.

For many manufacturers, higher efficiency systems have been in the works for a while, but the 2023 DOE standards, pandemic, and current supply chain issues have added pressure.

While new DOE standards drive innovation and opportunity within the HVAC industry, they also add pressure and complexity for manufacturers.

Manufacturers were eager to show off their latest energy-efficient RTUs, many of which can also be used to meet building owners’ decarbonization and electrification goals.

Much like subcooling, understanding and calculating superheat can be somewhat difficult for newbie technicians.

Through the new integration, ecobee thermostat owners who also own Generac home standby generators can easily see the status of the generator and remedy potential issues.

Not only has VRF technology been widely accepted by contractors and end users alike, virtually every major U.S. manufacturer is now offering these systems, as well.

When choosing a vacuum pump, its pays to find a unit that makes oil changes convenient.

Technicians need to understand the basic electrical fundamentals and how they relate to each other in order to better troubleshoot electrical failures.

Unfortunately, we can easily forget the role that suction driers can play in protecting the compressor and the compressor oil.

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

The "magic number" 1.08 is convenience factor. It is a bunch of math combined into one factor as a shortcut, although sometimes more precise calculation is better.

Posted by Xen . org security team on Nov 12

While many in the industry are pleased the DOE has taken the opportunity to work together to develop its final rule, exactly how much of the working group’s recommendation the regulatory agency will adopt remains to be seen.

After six meetings, the working group reached consensus and provided recommendations for energy conservation standards, test procedures, and metrics.

On Dec. 17, 2015, the U.S. Department of Energy (DOE) finalized new negotiated energy conservation standards for commercial air conditioners, heat pumps, and commercial warm-air furnaces, otherwise known as rooftop units (RTUs).

HVAC contractors in different climates and regions all over the U.S. agree that irregular upkeep is the most problematic issue when it comes to rooftop unit failure.

More than half of U.S. commercial building space is cooled by packaged HVAC equipment, according to the U.S. Department of Energy (DOE). So it comes as no surprise that energy efficiency is the biggest trend driving the rooftop market.

“It's simple. If you want to encourage women to prosper and develop, provide them with some prospering women to inspire them to develop.”

Two major HVAC industry organizations have weighed in on a DOE proposal that would phase out noncondensing gas furnaces for consumer use beginning in about six years.

Posted by Dave Aitel via Dailydave on Nov 02

In this episode we take a brief look at Jetbrains' Meta Programming System, a language workbench for creating external DSLs or for extending existing languages (such as Java). In a brief telephone discussion, Konstantin Solomatov explains what the system does and how it works. The system has recently been released into public beta and will be made available under then Apache 2.0 Open Source license.

This episode is about being a consultant in the software business.

Jafar Soltani of Rare (Microsoft Studios) discusses Continuous Delivery in AAA Games and how it can increase quality, reduce crunch, and deliver games faster. Topics include implementation and architecture, asset and delivery pipelines, and special challenges of games.

Jonathan Boccara, author of The Legacy Code Programmer’s Toolbox discusses understanding and working with legacy code. Working with legacy code is a key skill of professional software development that is often neglected.

Richard L. Sites discusses his new book Understanding Software Dynamics, which offers expert methods and advanced tools for understanding complex, time-constrained software dynamics in order to improve reliability and performance. Philip Winston spoke with Sites about the five fundamental computing resources CPU, Memory, Disk, Network, and Locks, as well as methods for observing and reasoning when investigating performance problems using the open-source utility KUtrace.

Tanmai Gopal, CEO of Hasura.io, joined SE Radio host Jeff Doolittle for a conversation about GraphQL. They discussed the history and rationale behind the original conception of GraphQL, as well as some of the use cases it is best suited for...

Eddie Aftandilian, Principal researcher at GitHub discusses GitHub copilot and how it can improve developer productivity with host Priyanka Raghavan. The discussion explores various subtopics such as the history of copilot, how it can improve developer...

Stanisław Barzowski of XTX Markets and a committer on the jsonnet project joins SE Radio's Robert Blumen for a conversation about the jsonnet programming language. A superset of JSON, jsonnet adds programming language capabilities, particularly to address the need to handle large but mostly repetitive JSON configurations. They discuss the project’s history, use cases for Grafana and Kubernetes config, and interoperability with YAML. They examine jsonnet details, including the command line, constrained capabilities of the language, and objects and inheritance, and then consider the toolchain: compiler, formatter, and linter, as well as test frameworks and testing, package management, and the language’s performance. Barzowski describes four implementations -- go, C++, Rust, and Scala -- as well as popular libraries and the standard library.

Andy Suderman, CTO of Fairwinds, joins host Robert Blumen to talk about standing up a kubernetes cluster. Their discussion covers build-your-own versus managed clusters provided by cloud services, and how to determine the number of kubernetes clusters an organization needs. Andy describes best practices for automating cluster provisioning, and offers recommendations about customizations and opinionation of cloud service providers, choice of container registry, and whether you should run complementary services such as CI and monitoring on the same cluster. The episode also examines the day 0/day 1/day 2 lifecycle, cluster auto-scaling at the cloud service level, integrating stateful services and other cloud services into your cluster, and kubernetes secrets and alternatives. Finally, they consider the container-network interface (CNI), ingress and load balancers, and provisioning external DNS and TLS certificates for cluster services.

Ines Montani, co-founder and CEO of Explosion, speaks with host Jeremy Jung about solving problems using natural language processing (NLP). They cover generative vs predictive tasks, creating a pipeline and breaking down problems, labeling examples for training, fine-tuning models, using LLMs to label data and build prototypes, and the spaCy NLP library.

Emily Bache, founder of the Samman Technical Coaching Society and author of several books about technical agile coaching, talks with SE Radio host Sam Taggart about katas and the importance of practice. They discuss how practicing in a safe environment helps developers to learn new skills and build new habits. They also talk about how Samman coaching combines this sort of deliberate practice with applying the lessons learned in practice to the production code base. They also touch briefly on the advantages of working in an ensemble fashion.

Brought to you by IEEE Computer Society and IEEE Software magazine.

AMD just announced today a design win in conjunction with the Lawrence Livermore National Laboratory (LLNL) and Hewlett-Packard Enterprise (HPE), win which it will be providing the hardware powering the El Capitan exascale-class supercomputer. What caught our eye about this announcement was not the compute performance -- which will be enormous ... [PCSTATS]

" Writing an entire article on the Apex 3 was a really easy task thanks to the higher actuation point and we did not make any mistakes like on the regular high-speed gaming-only keyboards. This is a good point to recommend when using the keyboard in corporate offices as well: the new SteelSeries domes are silent, while the full-size layout allows ... [PCSTATS]

The Heritage Foundation has a plan to rewrite the rules of government under a second Trump term, and they’ve helpfully laid it all out for public viewing.

Faced with the spread of militarized police training facilities known as "cop cities," grassroots activists are taking the call to #DefundPolice to cities nationwide.

In Tijuana, Uganda, and Gaza, refugees facing dispossession, displacement, and constant violence are finding moments of solace in the art of dance.

Para los inmigrantes que enfrentan pérdidas desde lejos, el apoyo puede provenir de la comunidad, nuevos rituales y mejores políticas.

Tricia Hersey’s new book insists we have the power to refuse capitalism’s grind culture and instead prioritize rest. 

Originally a western communist who supported Stalin's authoritarianism, usually backed by tanks, the modern tankie supports pretty much any authoritarian government or dictatorship that opposes the West.

Want to know how sleep "resets" your brain? How memories are formed and retained?  Then watch The Benefits of a Good Night's Sleep, embedded below, and learn how sleep balances and regulates the body's vital systems which, in turn, affects declarative and procedural memory.

This short TED-Ed lesson by Shai Marcu is an important topic as school starts and students will soon be staying up late or all night in order to cram for tests and other educational requirements. Marcu goes into detail describing the neurological importance of 8 hours of sleep, but the application is interesting as going to sleep three hours after memorizing math formulas (declarative memory) and one hour after practicing music scales (procedural memory) is the most ideal.

I'm left wondering what I might have accomplished if my sleep and learning patterns were consistent during my formative years...
    

This technical article we will go through a number of existing applications for conducting a wide range of electrical studies. However, the practice says that studies involving load flow and fault analyses are the most commonly utilized programs in power transmission... Read more

The post Eleven most important calculations you can perform with power system analysis software appeared first on EEP - Electrical Engineering Portal.

In the design of electrical power systems, the ANSI Standard Device Numbers denote what features a protective device supports (such as a relay or circuit breaker). These types of devices protect electrical systems and components from damage when an unwanted... Read more

The post Protection Relay – ANSI Standards appeared first on EEP - Electrical Engineering Portal.

These standards are the whole of the prescriptions on the basis of which machines, apparatus, materials and the installations should be designed, manufactured and tested so that efficiency and function safety are ensured – and all according to the UK Electrical... Read more

The post UK Electrical Industry British Standards (BS) appeared first on EEP - Electrical Engineering Portal.