science and technology

AI Takes on HVAC Labor Shortage

Software company Bluon is betting that artificial intelligence, or AI, can help solve the labor shortage — and pass along decades of knowledge from retiring HVAC techs to the next generation.




science and technology

Building a Data Culture

Not only are the right data-driven leaders required, HVAC contractors also need to go through the necessary process to build a data culture within their company.




science and technology

Hear How Lavender AC & Heating Boosted Growth By 100%

Struggling to grow revenue past $500K, Lavender transformed their operations with Sera, the all-in-one FSM solution.




science and technology

What Small Businesses Need to Know about Generative AI

Evolving AI technology is becoming an important business tool for personalizing customer experience, analyzing data, and much more.




science and technology

AI Can Be a Useful Tool, But Still Needs Human Oversight, Distributors Told

 “Technology’s not going to solve everything, but you need to know how to use it,” Nelson Valderrama, CEO of Intuilize, told HVACR distribution professionals during the recent Heating, Air-conditioning & Refrigeration Distributors International conference.




science and technology

Putting AI to Work in the Trades

As AI continues to prove itself as more than just a fad, businesses should be harnessing its power to increase efficiencies and improve customer experiences.




science and technology

Manufacturers, Software Providers Lean Into Artificial Intelligence

AI can make work easier, more efficient for boots-on-the-ground HVAC professionals.




science and technology

The Many Uses of AI in HVAC

Josh Crouch and Tersh Blissett, who have HVAC backgrounds, say AI can be employed in an answering service or a chatbot, for outbound dialing, as a technician’s assistant, or to respond to customers’ online reviews.




science and technology

Did Artificial Intelligence Just Kill Local SEO?

AI, especially its use in information gathering, needs to be harnessed by HVAC contractors if they want to be noticed when customers are searching for services online.




science and technology

Optimizing Efficiency in Your HVAC Business

Read this eBook to find out more on software solutions that help contractors reduce wasted time and cost.




science and technology

Navigating Technology Adoption in the HVACR Trades

While new technology can certainly help streamline certain aspects of HVAC business operations, like accounting and inventory management, it still needs to be viewed as a tool to augment the capabilities of employees, not replace them entirely.




science and technology

Advancements in AI a Boon to HVAC Customer Service

As AI technology continues to advance and becomes nearly indistinguishable from a human representative, HVAC companies can use these tools to help streamline the workloads of CSRs.




science and technology

2024 Dealer Design Awards: Contractor Services & Software

The gold winner can service, certify, and ship a combustion analyzer the same day it’s received.




science and technology

Software Saves Times, Improves Efficiency for HVAC Contractors

Contractors can get more productivity from staff by letting software take care of the small things.




science and technology

Artificial Intelligence is Taking on More Tasks, and This Can Help HVAC Office Workers Get More Done

Artificial intelligence, or AI, is now able to handle many of an HVAC contractor’s administrative tasks, and also help employees perform their own tasks better.




science and technology

AI and 'Ask A2L'

Artificial intelligence and HARDI’s new AI tool were big topics during the group’s recent Focus conference in Dallas, Texas.




science and technology

HVAC Contractor Ditches Paper, Pen, and Binder for App and Scannable Labels

With modern technology, HVAC contractors can leave paperwork behind, and instead share information in real-time.




science and technology

Optimizing HVACR Efficiency with Smaller Diameter Copper Tubes

Efficient refrigeration and HVAC systems are essential to energy management and operational cost of residential, commercial, or industrial buildings.




science and technology

Understanding the Use of Suction Filters/Driers

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




science and technology

Breaking the Code: Controlling Humidity and Particulate to Meet Building Standards

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




science and technology

The Impact of Adding or Removing Water from Air

We often humidify and dehumidify as part of our work, but let’s take a different look at what happens when we do that.




science and technology

Guiding Customers through Indoor Air Quality and the Tips to Maintain IAQ

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




science and technology

Troubleshooting Puzzle: A Split System That’s Not Cooling

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




science and technology

Elon Musk Is Attempting to Revolutionize HVAC Systems

Musk confirmed that his company could make use of their current heat pump technology to develop a smart HVAC system for home use.




science and technology

Why Remote Startup for Variable Frequency Drives is Essential

Selecting a VFD that features remote startup can decrease the number of individuals needed onsite and provide valuable safety benefits.




science and technology

A Simple Guide to the Refrigeration Cycle and How Air Conditioners Work

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




science and technology

How Can A Direct Drive Design Optimize Cooling Tower Performance?

A variable speed drive (VSD) controls the speed of the high-torque, direct-drive motor for optimal fan operation.




science and technology

The Secret to Energy and Cost Savings: Pump System Evaluation

Determining the right pump to save energy in a given application can be broken down into three general steps.




science and technology

Internet of Things Improves HVAC Efficiency and Effectiveness

IoT-enabled HVAC systems can accommodate a seamless user experience while reducing environmental impact.




science and technology

Maximizing Indoor Air Quality Without Sacrificing Energy Efficiency

The proper application of modern HVAC technologies can help maximize indoor air quality while minimizing losses in operational efficiency.




science and technology

Upper-Room UVGI: An Infectious Disease Control Strategy

The pandemic has marked a turning point for an underutilized technology for infectious disease control in buildings.




science and technology

Why Changing Refrigerants May Mean Your Existing Pump Needs Replacing

When changing the refrigerant within your pumping application, it is worth discussing the application with a process specialist.




science and technology

Understanding the Formula to Calculate BTUH

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.




science and technology

Propane Can Offer HVAC Customers A Reliable Option for Backup Power

The growing electricity demands being placed on the country’s century-old grid are resulting in an increased number of unexpected power outages across the U.S.




science and technology

How Much Do You Know About HVAC Service?

Whether you’re the owner of an HVAC contracting company or a student at a tech school, take this quiz to find out how much you know about servicing equipment.




science and technology

How to Measure Net Oil Pressure

Before servicing any refrigeration or air conditioning systems that contain an oil pump, technicians should make sure they understand the difference between net oil pressure and oil pump discharge pressure.




science and technology

The 3-4-5 Rule for Walk-In Coolers And Freezers

During the installation of a new walk-in cooler or freezer, it is imperative the box remain square and level during the assembly of its panels.




science and technology

Public Review of Proposed Revisions to ACCA Manual SPS (HVAC Design for Swimming Pools and Spas)

The 30-day ANSI public review period closes May 14.  




science and technology

Harlan is New Business Development Manager at WAGO

Amy Harlan, who has an extensive background in electronics and device connectivity, is the new business development manager for device connection technology at the global electronics technology firm.




science and technology

Defining and Calculating Voltage Imbalance

Saving one compressor will cover the cost of a voltage monitor and then some.




science and technology

Nationwide 250 hp Boiler Achieves 5 ppm NOx Performance

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.




science and technology

10 Things to Know Before Your First Mini-Split Call

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.




science and technology

H2VAC: Using Hydrogen Fuel to Decarbonize Heating and Cooling

Discover how hydrogen fuel is poised to revolutionize HVAC systems by reducing carbon emissions and easing strain on electric grids, driving the industry toward a decarbonized future.




science and technology

6 Essential Steps for Teaching CO₂ Refrigeration

CO2 refrigeration systems demand both classroom knowledge and hands-on experience, which is why blending theory with practice creates top-notch technicians.




science and technology

Re: shell wildcard expansion (un)safety

Posted by Eli Schwartz on Nov 10

The earliest version of the Bash Pitfalls guide that includes a warning
about the topic, per the Wayback Machine:

https://web.archive.org/web/20090426020027/https://mywiki.wooledge.org/BashPitfalls#Filenames_with_leading_dashes

Overall, wildcards are just a classic "here is a programming language
footgun, we cannot fix it because the language is backwards compatible
to the 90s and earlier" which amounts to:

people love bash because...




science and technology

Re: shell wildcard expansion (un)safety

Posted by lists on Nov 10

That says nothing about the amusing character # either at the
start of a name or after whitespace.





science and technology

Re: shell wildcard expansion (un)safety

Posted by Fay Stegerman on Nov 10

* Eli Schwartz <eschwartz () gentoo org> [2024-11-10 00:59]:
[...]

[...]

Obviously, shell scripts and wildcards are one of the easiest ways to trip up
here. But the underlying issue is that CLI interfaces mix options and
arguments: the lack of a clean separation between data and code/commands
(another example is e.g. printing unescaped control characters to stdout,
something discussed on this list before, and far too common IME, as I...




science and technology

Xen Security Advisory 464 v2 (CVE-2024-45819) - libxl leaks data to PVH guests via ACPI tables

Posted by Xen . org security team on Nov 12

Xen Security Advisory CVE-2024-45819 / XSA-464
version 2

libxl leaks data to PVH guests via ACPI tables

UPDATES IN VERSION 2
====================

Public release.

ISSUE DESCRIPTION
=================

PVH guests have their ACPI tables constructed by the toolstack. The
construction involves building the tables in local memory, which are
then copied into guest memory. While actually used...




science and technology

Xen Security Advisory 463 v2 (CVE-2024-45818) - Deadlock in x86 HVM standard VGA handling

Posted by Xen . org security team on Nov 12

Xen Security Advisory CVE-2024-45818 / XSA-463
version 2

Deadlock in x86 HVM standard VGA handling

UPDATES IN VERSION 2
====================

Public release.

ISSUE DESCRIPTION
=================

The hypervisor contains code to accelerate VGA memory accesses for HVM
guests, when the (virtual) VGA is in "standard" mode. Locking involved
there has an unusual discipline, leaving...