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VRF Gaining Acceptance in the HVAC Marketplace

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.




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Mini Splits Continue to Revolutionize the HVAC Industry

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.




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Cooper&Hunter and Tropic Supply Team Up to Donate HVAC Systems

In collaboration with Tropic Supply, Cooper&Hunter has gifted Daytona State College with six complete HVAC systems, considering the donation as a useful investment in the next generation. The on-campus working stations, which include units from Cooper&Hunter’s modern “Sophia Mini-Split Single Zone Series,” will give students hands-on learning opportunities with technology that is becoming increasingly popular in the U.S.




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RectorSeal, Panasonic, and Contractor Donate VRF System to Arizona Church

Our Lady of Guadalupe Catholic Church’s community center in the Tempe, Arizona suburb of Guadalupe now has state-of-the-art HVAC thanks to variable refrigerant flow equipment, accessories, and installation labor donations from RectorSeal, Panasonic Air Conditioning Group (a division of Panasonic Corp. of North America), and Woody’s Heating and Air Conditioning.




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Access Inc. Joins Johnson Controls-Hitachi Manufacturers' Sales Rep Team

Access Inc. will be the new manufacturers' representative for Hitachi VRF systems and SmartFlex™ systems in eastern Michigan and Northwest Ohio




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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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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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Basic Steps For HVAC Coil Cleaning

Cleaning coils is a fairly simple task, but one that plays an important role in keeping a unit running strong.




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Why More HVAC Contractors Should Offer Duct Cleaning Services

Over time, dirt, dust, pet dander, debris, and more accumulate in air ducts. And since the HVAC system works basically as a whole-home vacuum, all of that is recirculated through homes when the HVAC system runs, unless the ducts are cleaned out.




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The Delivery of a New HVAC System

The medical profession and the HVAC industry have a lot of parallels when it comes to learning how to work together as a team.




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A Capital Cost and Energy Saving Approach to Chilled Water HVAC with Zero Emissions Potential

The proposed new approach to chilled water HVAC systems promises to provide significant capital cost savings, energy cost savings, and a path to eliminate CO2 emissions.




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Three Tips for Your Next System Evacuation

Ensuring a vacuum pump system is evacuated and free of air, nitrogen, moisture, and other contaminants is a crucial step to keep the system running optimally.   




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The Importance of Clean Oil in a Vacuum Pump

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




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Should HVAC Contractors Be Selling Geothermal?

HVAC contractors should be prepared to sell geothermal to new customers regardless of any incentives.




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Integrating the Advantages of Geothermal Into an HVAC Company

Geothermal heat pumps tap into a renewable source of energy to provide comfort for a home, and HVAC contractors can tap into this market for increased sales.




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Manufacturers Help Contractors Keep up with Heat Pump Technology as Market Grows

Manufacturers and contractors are working to educate end users about the ways heat pumps work differently from traditional heat sources.




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Geothermal Offers an Opportunity for HVAC Contractors

The moment for geothermal seemed to have arrived several times since the 1970s. A number of factors are forecasting wider use of this type of heating and cooling solution.




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Defense Production Act, Incentives ‘Turbocharge’ Geothermal

Since President Joe Biden invoked the DPA back in June 2022, HVAC-related energy efficiency incentives and renewable energy technology, have made their way into the spotlight. Many of those who work in the geothermal industry have been “waiting for this day” for decades.




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Concerns Around HVAC Heat Pump Installs

Contractors will be tasked with more installs of heat pumps, and their challenges, as customers learn more about their benefits.




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Achieving Geothermal Success

At a recent IGSPHA meeting, tips were shared on how HVAC contractors can become geothermal powerhouses.




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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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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.




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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.




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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.




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Internet of Things Improves HVAC Efficiency and Effectiveness

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




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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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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.




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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.




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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.  




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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.




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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.




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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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CVE-2024-50386: Apache CloudStack: Directly downloaded templates can be used to abuse KVM-based infrastructure

Posted by Daniel Augusto Veronezi Salvador on Nov 12

Severity: important

Affected versions:

- Apache CloudStack 4.0.0 through 4.18.2.4
- Apache CloudStack 4.19.0.0 through 4.19.1.2

Description:

Account users in Apache CloudStack by default are allowed to register templates to be downloaded directly to the
primary storage for deploying instances. Due to missing validation checks for KVM-compatible templates in CloudStack
4.0.0 through 4.18.2.4 and 4.19.0.0 through 4.19.1.2, an attacker that...




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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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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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Commercial HVAC Customers Demand Smart RTUs, Manufacturers Deliver

It is 2018, and this is not your father’s rooftop equipment. The old, reliable system taking up space on the roof has become so much more.




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Cutting-Edge Construction: Putting Energy Management Into Practice

Here are two examples of the difference that high-performance building features and high-efficiency HVAC technology can make.




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Technology Investments For HVAC Contractors Pay in Time Saved

HVAC contractors could invest in all kinds of technology, ranging from tools to management systems, but often, the question lies with the payoff.




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Manufacturers Meet Demand for More Intelligent Building Controls

Smart products enable service providers to take a more proactive approach to addressing HVAC system and equipment issues, said Susie Gornick.




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Johnson Controls acquires EasyIO Building and Energy Management System

Johnson Controls announced that it closed an agreement to purchase the EasyIO Building and Energy Management System (BEMS) product line.




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Acuity Brands to Acquire KE2 Therm

The acquisition extends Distech Controls’ addressable market into commercial refrigeration.




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BrainBox AI in Agreement to Acquire ABB’s Multisite Retail Energy Management System Integrator Business

BrainBox AI intends to integrate ABB’s MSR business and its installed base of 12,000-plus retail locations in its current operations.





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DOAS Gaining Traction in US

Commercial building codes are mandating higher volumes of fresh-air intake than ever before. To help meet these ventilation requirements, more and more HVAC contractors and building owners are turning to dedicated outdoor air systems (DOAS). 




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DOE, Industry Finalize Standards for Commercial HVAC Products

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




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Portable HVAC Products Provide Specialized Solutions

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.




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Coastal Coat Casing Package: Equipment Casing

The Coastal Coat Casing Package is now offered as a premium option for the Modine Atherion packaged ventilation system. 




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Roof Mount System Secures Solar Racks, HVAC Equipment, and More

OMG Roofing Products has introduced the PowerGrip Plus roof mount system, a watertight structural attachment system used to secure solar racks, HVAC, and other equipment to roofs covered with thermoplastic (TPO and PVC) membranes.