The use of UV-C in HVAC systems has proven to be an effective way to minimize the threat of volatile organic compounds (VOCs), small particles, and other airborne pathogens commonly found in health care environments.

MegaPress Transition Couplings can be used to transition between galvanized or carbon steel pipe and copper, PEX, or stainless steel in seconds.

Future Fuels Symposium 2023 on Fossil Fuel Alternatives will discuss the benefits of hydrogen blends and bio-fuels and related solutions, including a new low nitrogen oxides (NOx) technology and UL-approved burners capable of firing hydrogen blends designed to reduce greenhouse gas emissions.

Emerson announced a new platform of AWEF-compliant condensing units for walk-in coolers to meet the DOE rule.

Regal Beloit Corp. has become an expert in FER compliance by redesigning its products to meet the new standards, including the Genteq^® Ensite^® motor, DEC Star^® blower assemblies, and a new electronically commutated motor (ECM) to provide FER compliance for entry-level fans. These products were on display at the 2019 AHR Expo.

The Occupational Safety and Health Administration’s (OSHA’s) Confined Spaces in Construction final rule, issued May 4, 2015, created confusion in the HVAC industry. ACCA announced that, after months of negotiations with OSHA, an agreement clarifies that the rule has very limited application in the residential HVAC industry.

eSUB Construction Software has announced a new product integration, bringing together PlanGrid’s field productivity application with eSUB’s project management and document control platform for collaboration and productivity in the field.

Filter fans perform a critical task of cooling equipment within electrical enclosures while also protecting equipment from harmful materials.

By employing a ventilation strategy such as a DOAS, conditioned fresh air can be brought into the building, thus improving IAQ and ensuring a safer environment.

The ductless market has grown significantly in the U.S. in the last 20 years. What was once a fringe product has become a prominent subset of the HVAC world.

Used in new construction and retrofit applications, the product is small, light, and customizable.

Daikin Applied introduced two chillers and a rooftop unit and also took the opportunity to discuss the company’s decision to transition to R-32.

The giant clock on top of the Parker Hannifin Corp. — Sporlan Division’s ZoomLock^® Roadshow truck counted down during the 2019 AHR Expo, keeping track of the time left until the next live demo. Every 40 minutes, Sporlan would bring attendees up to physically make the connection themselves.

Thermostats are like other pieces of interactive equipment: People are thrilled by each development but move on quickly when the next feature comes along.

While traditional hospital HVAC systems often consist of chillers and boilers, other types of equipment are becoming more widely accepted in the health care market, including variable refrigerant flow (VRF) systems, air curtains, and geothermal heat pumps. 

Developments in zoning capabilites have brought mini splits into the multiroom realm. And it goes without mention that the march of engineering progress has taken ductless systems on the road, into parts of the country where no mini split has ever gone before.

Different areas have particular needs and also embrace new technology at different speeds.

While ductless HVAC is not without its flaws, the technology has evolved exponentially to now provide customers with numerous configurations at affordable prices appropriate for nearly every application, which is music to the ears of entrepreneurial contractors.

Once only found in mild climates, the technology now stretches across the U.S., thanks to advances in inverter technology and zone controls. On the other hand, the level of sophistication in these systems sometimes makes them difficult to troubleshoot when something goes wrong.

Friedrich recently sponsored a NEWS webinar titled “Ductless Split System Innovations That Matter to Your Bottom Line.”  Below are questions taken from the Q&A portion of that webinar.

This product line features voice-activated control through the Google Assistant on smart speakers, if the mini split has built-in Wi-Fi.

Many of Fujitsu General America’s Halcyon mini-split system products now qualify for Energy Star Most Efficient certification.

The 25 SEER model is a wall mount unit with Wi-Fi capabilities, a silver ion filter, a cold catalyst filter, and a GoldFin anti-corrosive coating.

The two-story lake house totals 4,600 square feet above ground and 2,000 finished square feet in the daylight basement.

The equipment in this month’s troubleshooting situation is a split system that has only been in service for two years, but there is a lot of history.

Most of the rest of the world has relied on ductless mini-split systems for their heating and cooling needs for decades, but that has not been the case in the U.S. That may be changing with the advent of ducted mini-split systems.

In this month’s troubleshooting problem, the equipment is a split system that’s approximately 8 years old.

The first time a technician has to tackle a ductless mini-split can be nerve-racking, but by following these 10 tips, the job can be done without all the anxiety.

Daikin Applied’s recently introduced SiteLine Building Controls gives building owners and operators the tools and insights needed to optimize performance, improve IAQ, and trim energy use and carbon emissions.

Posted by Ciro Santilli OurBigBook via dev on Sep 17

Recording Venue: MongoSF, San Francisco Guest: Dwight Merriman As application data size and throughput have outgrown the processing and storage needs of commodity servers, replication has become an increasingly important strategy. In this episode, Robert talks with Dwight Merriman about database replication. Topics covered include replication basics, master-slave versus master-master, failure and recovery, replication versus […]

Edaena Salinas talks with Charlie Berger about Predictive Applications. The discussion begins with an overview of how to build a Predictive Application and the role of Machine Learning. It then explores different Machine Learning algorithms that can be implemented natively in a database.

Founder of Signal Sciences Zane Lackey talks with Kim Carter about Application Security around what our top threats are today, culture, threat modelling, and visibility, and how we can improve our security stature as Software Engineers.

WebRTC provides real time video and audio streaming capabilities to applications. Spencer Dixon explains the different parts of WebRTC and how they used it to build a pair programming application.

Vladimir Khorikov discusses functional programming in enterprise applications with Jeremy Jung.

Sven Schleier and Jeroen Willemsen from the OWASP Mobile Application Security Verification Standard and Testing Guide project discuss mobile application security and how the verification standard and testing guide can be used to improve your app’s...

Arin Bhowmick, Global Vice President and Chief Design Officer at IBM, discusses why and how UX design for enterprise applications is different than for consumer applications.

Kim Carter of BinaryMist discusses Dynamic Application Security Testing (DAST) and how the OWASP purpleteam project can improve early defect detection. Host Justin spoke with Carter about how DAST can provide meaningful feedback loops to developers...

Dhruba Borthakur, CTO and co-founder of Rockset, discusses the use cases and core requirements of real-time analytics, as well as the evolution from batch to real time and the need for a new architecture with host Kanchan Shringi.

Josef Strzibny the author of Deployment from Scratch discusses how and why it's valuable to learn how to self host applications.

Davide Bedine, a cloud solution architect at Microsoft and professional Dapr enthusiast joined host Jeff Doolittle to discuss his book, Practical Microservices with Dapr and .NET. Dapr, the Distributed Application Runtime, simplifies cloud-native...

Gill Hoffer, co-founder and CTO at Salto, talks with SE Radio host Kanchan Shringi about a new persona -- the Business Engineer -- created by the rise of SaaS and adoption of best-of-breed business applications for back office systems. They examine...

Gill Hoffer, co-founder and CTO at Salto, talks with SE Radio host Kanchan Shringi about a new persona -- the Business Engineer -- created by the rise of SaaS and adoption of best-of-breed business applications for back office systems. They examine...

Nicholas Manson, a SaaS Architect with more than 2 decades of experience building cloud applications, speaks with host Kanchan Shringi about identity and access management requirements for cloud applications. They begin by examining what a digital...

Simon Bennetts, a distinguished engineer at Jit, discusses one of the flagship projects of OWASP: the Zed Attack Proxy (ZAP) open source security testing tool. As ZAP’s primary maintainer, Simon traces the tool's origins and shares some anecdotes with SE Radio host Priyanka Raghavan on why there was a need for it. They take a deep dive into ZAP’s features and its ability to integrate with CI/CD, as well as shift security left. Bennetts also considers what it takes to build a successful open source project before spending time on ZAP’s ability to script to provide richer results. Finally, the conversation ends with some questions on ZAP’s future in this AI-powered world of bots.

Chad Michel, Senior Software Architect at Don’t Panic Labs and co-author of Lean Software Systems Engineering for Developers, joins host Jeff Doolittle for a conversation about treating software development as an engineering discipline. They begin by discussing the need for engineering rigor in the software industry. Chad points out that many developers lack awareness of good engineering practice and are often unaware of resources such as the Software Engineering Body of Knowledge (SWEBOK). Among the many topics explored in this episode are design methodologies such as volatility-based decomposition and the work of David Parnas, as well as important topics such as quality, how to address complexity, designing for change, and the role of the chief engineer. This episode is sponsored by ClickSend. SE Radio listeners can get a $50 credit by following the link.

Nowadays, it seems that everything we do tends to be somehow automated. The very same is happening in electrical distribution systems. The distribution system at the medium voltage (MV) or low voltage (LV) levels is designed using different structures such... Read more

The post The essentials of automation applied to distribution systems via PLCs, SCADA, IEDs, and RTUs appeared first on EEP - Electrical Engineering Portal.

Electrical distribution systems comprise a large number of remote applications and locations, and it has traditionally been challenging to monitor and regulate these remote applications and sites. Utility companies have been installing remote terminal/telemetry units, often known as RTUs, at... Read more

The post Three most common SCADA applications in MV/LV distribution systems you SHOULD know appeared first on EEP - Electrical Engineering Portal.

Circuit breakers (CBs) do interrupt fault currents and close onto faults. Besides, they could be used as isolation devices like disconnectors. The CBs manufacturers’ brochures and standards provide extensive data to select and assess the CBs performance, but designers must... Read more

The post MV/HV switchgear (circuit breaker) switching capability and suitability for specific applications appeared first on EEP - Electrical Engineering Portal.