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HVAC Contractors Discuss Residential Variable Refrigerant Flow Trends

As HVACR technology advances, contractors often find themselves navigating new learning curves on a regular basis. VRF is no exception.




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LG Earns AHRI Performance Award for the Sixth Consecutive Year

Across seven product categories, LG’s HVAC solutions again pass AHRI's comprehensive performance certification program.




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Is It Time to Replace the Liquid Line Drier?

Keeping a refrigeration system clean and dry by changing the liquid line drier can be the least expensive insurance against compressor failure.




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When Troubleshooting a Refrigeration System, Don’t Make Assumptions

Troubleshooting refrigeration systems can be complex and frustrating, so put aside any assumptions and inspect the system thoroughly before making any diagnosis.




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Refrigerant Management Strategies Are Urgently Needed

Contractors need to implement a refrigerant management strategy that accommodates both legacy and A2L systems, as well as emphasizes recovery and reclamation.




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Temporary Fixes Can Jumpstart a Refrigeration System

Timely refrigeration repairs are crucial to avoid product loss; temporary fixes can sometimes keep systems running until parts arrive.




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March 27, 2023 NEWSRoom: Heat Pumps Part of Musk’s Master Plan, AHRI Policy Leadership Award, Enter Top 30 Distributors of 2023

Catch up on the latest headlines in our NEWSRoom video series.




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Project Files: Episode 61 — All-Electric, Zero-Carbon Michigan Home

This Michigan home is proof that even when achieving high-level green building standards, more can be done to improve sustainability.




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Offering Geothermal a Smart Move for HVAC Contractors

With the geothermal market enjoying an enormous surge in popularity due to financial incentives and its reputation for sustainability, now is the time for contractors to strike while the iron is hot and add geothermal to their offerings.




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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.




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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.




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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.




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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.




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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.




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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.




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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.




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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...




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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...




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

Posted by Andrew Cooper on Nov 12

Data are leaked into the PVShim guest, but it is the shim Xen
(exclusively) which has access to the ACPI tables.

The guest which has been shim'd can't architecturally access the leaked
data.

~Andrew





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

Posted by Demi Marie Obenour on Nov 12

Is this unconditional (perhaps because the relevant data gets zeroed out
by the shim), or does it only apply when the PV guest can't extract data
from the shim's memory? For instance, 32-bit PV guests aren't security
supported anymore, but the PV shim isn't supposed to rely on the
security of the shim itself, only of the rest of the system.




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Demand for Frequency Drives on the Uptick

AC drives are an essential part of the HVAC marketplace, and the growth of the market looks to be exceptional over the next few years. According to MarketsandMarkets, the market is expected to grow from an estimated $15.72 billion in 2016 to $22.07 billion by 2021.




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Emerson’s Equipment Evolutions Strengthen HVACR Experience

Emerson continues to evolve its equipment lines in an effort to introduce its technologies to a broader customer base.




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Advanced Refrigeration Technologies Boosting Energy Efficiency in Supermarkets

In supermarkets, where HVAC and refrigeration equipment use 50 to 60 percent of all electricity consumed, new technologies and advanced control strategies have been developed to help boost energy efficiency as well as reduce emissions.




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Honeywell Launches Autonomous Building Sustainability Solution To Fight Rising Global Energy Consumption

Honeywell announced the launch of Honeywell Forge Energy Optimization, a cloud-based, closed-loop, machine learning solution.




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Project Files: Episode 27 — U.S. Air Conditioning Distributors

When it comes to smart thermostats, USACD walks the walk and talks the talk.




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Serviceability, Flexibility Earn Aaon’s WH Series DDA Gold

Aaon’s focus on serviceability and performance helped the WH Series earn gold in The NEWS’ 2017 Dealer Design Awards HVAC Light Commercial Equipment category.




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Modine Donation Keeps High School Gridders Cool

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




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Wireless, Connected Tools Surging in Popularity

There’s no doubt the connectivity of mobile devices has made our personal lives more convenient, but now they’re also helping make technicians more efficient, thanks to tool manufacturers developing wireless-enabled devices and test and measurement apps for download.




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Fluke Connect Grabs Testing and Monitoring Gold

Fluke Corp.’s Fluke Connect received the gold award in the Testing & Monitoring category of the 2015 Dealer Design Awards.




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Testing, Monitoring Products Designed with the User in Mind

Many new testing and monitoring products were on display last month at the AHR Expo in Orlando, Florida, where manufacturers showcased and demonstrated their newest, smartest products.




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HVAC Pros Discuss Their Favorite Diagnostic Troubleshooting Tools

HVACR technicians are special individuals. They have the intelligence, aptitude, and knack for problem-solving. In fact, they are expected to know how to diagnose and troubleshoot equipment of all types, sizes, and ages.




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2020 Dealer Design Awards: Testing & Monitoring Products

Badger Meter won Gold in the Testing and Monitoring category for its Dynasonics® TFX-5000 ultrasonic clamp-on meter, which measures volumetric flow and heating/cooling energy rates in clean liquids, as well as those with small amounts of suspended solids or aeration, such as surface water or raw sewage.




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Growing Trends in Tool Technology Bring Benefits for Technicians

Technological developments are consistently improving the tools technicians have to use.




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Snort Subscriber Rules Update 2024-10-10

Posted by Research via Snort-sigs on Oct 10

Talos Snort Subscriber Rules Update

Synopsis:
This release adds and modifies rules in several categories.

Details:
Talos has added and modified multiple rules in the malware-cnc and
server-webapp rule sets to provide coverage for emerging threats from
these technologies.

For a complete list of new and modified rules please see:

https://www.snort.org/advisories




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Snort Subscriber Rules Update 2024-10-15

Posted by Research via Snort-sigs on Oct 15

Talos Snort Subscriber Rules Update

Synopsis:
This release adds and modifies rules in several categories.

Details:
Talos has added and modified multiple rules in the file-image,
malware-cnc, malware-other, os-windows and server-mail rule sets to
provide coverage for emerging threats from these technologies.

For a complete list of new and modified rules please see:

https://www.snort.org/advisories




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Snort Subscriber Rules Update 2024-10-17

Posted by Research via Snort-sigs on Oct 17

Talos Snort Subscriber Rules Update

Synopsis:
This release adds and modifies rules in several categories.

Details:
Talos has added and modified multiple rules in the policy-other and
server-webapp rule sets to provide coverage for emerging threats from
these technologies.

For a complete list of new and modified rules please see:

https://www.snort.org/advisories




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Snort Subscriber Rules Update 2024-10-22

Posted by Research via Snort-sigs on Oct 22

Talos Snort Subscriber Rules Update

Synopsis:
This release adds and modifies rules in several categories.

Details:
Talos has added and modified multiple rules in the and server-webapp
rule sets to provide coverage for emerging threats from these
technologies.

For a complete list of new and modified rules please see:

https://www.snort.org/advisories




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Snort Subscriber Rules Update 2024-10-24

Posted by Research via Snort-sigs on Oct 24

Talos Snort Subscriber Rules Update

Synopsis:
This release adds and modifies rules in several categories.

Details:
Talos has added and modified multiple rules in the file-multimedia,
malware-cnc, protocol-snmp and server-webapp rule sets to provide
coverage for emerging threats from these technologies.

For a complete list of new and modified rules please see:

https://www.snort.org/advisories




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Snort Subscriber Rules Update 2024-10-29

Posted by Research via Snort-sigs on Oct 29

Talos Snort Subscriber Rules Update

Synopsis:
This release adds and modifies rules in several categories.

Details:
Talos has added and modified multiple rules in the browser-firefox,
malware-cnc, malware-other, os-linux and server-webapp rule sets to
provide coverage for emerging threats from these technologies.

For a complete list of new and modified rules please see:

https://www.snort.org/advisories




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Snort Subscriber Rules Update 2024-10-31

Posted by Research via Snort-sigs on Oct 31

Talos Snort Subscriber Rules Update

Synopsis:
This release adds and modifies rules in several categories.

Details:
Talos has added and modified multiple rules in the malware-cnc,
malware-other and server-other rule sets to provide coverage for
emerging threats from these technologies.

For a complete list of new and modified rules please see:

https://www.snort.org/advisories




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Snort Subscriber Rules Update 2024-11-04

Posted by Research via Snort-sigs on Nov 04

Talos Snort Subscriber Rules Update

Synopsis:
This release adds and modifies rules in several categories.

Details:
Talos has added and modified multiple rules in the and server-webapp
rule sets to provide coverage for emerging threats from these
technologies.

For a complete list of new and modified rules please see:

https://www.snort.org/advisories




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Snort Subscriber Rules Update 2024-11-07

Posted by Research via Snort-sigs on Nov 07

Talos Snort Subscriber Rules Update

Synopsis:
This release adds and modifies rules in several categories.

Details:
Talos has added and modified multiple rules in the browser-plugins and
server-webapp rule sets to provide coverage for emerging threats from
these technologies.

For a complete list of new and modified rules please see:

https://www.snort.org/advisories




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Snort Subscriber Rules Update 2024-11-12

Posted by Research via Snort-sigs on Nov 12

Talos Snort Subscriber Rules Update

Synopsis:
Talos is aware of vulnerabilities affecting products from Microsoft
Corporation.

Details:
Microsoft Vulnerability CVE-2024-43451:
A coding deficiency exists in Microsoft Windows SmartScreen that may
lead to spoofing.

Rules to detect attacks targeting these vulnerabilities are included in
this release and are identified with:
Snort 2: GID 1, SIDs 62022 through 62023,
Snort 3: GID 1, SID 300612....




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Introducing the HVAC Electrify and Decarbonize e-newsletter

ACHR NEWS launches new tools to help readers stay up-to-date on the latest trends.




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The NEWSMakers Podcast: Data Driven HVAC Decisions

Frank Bacchetta of Total Comfort Group talks about how his company uses data to improve the customer experience.




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Venturing Into E-Commerce: What HVAC Contractors Should Think About

Selling products online is a whole new ball game. So, contractors will want to learn about their consumers buying journeys, and thoughtfully consider how to launch the online store, what products to sell, and how to market it.




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EPA: Refrigerant Reclamation On the Rise

EPA is counting on increased recovery and reclamation in order to maintain existing HVAC equipment, and finally, the numbers are going in the right direction.




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A Case Study: Driving Energy Efficiency Through Utility Incentives

Is reducing a facility's energy consumption by over 130,000 kWh annually through HVAC optimization possible?




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Building a Data-Driven Home Service Business

With how cutthroat and competitive the HVAC market is, contractors must leverage data-driven insights and technological advancements to drive growth, attract ideal customers, and optimize customer satisfaction.