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Tour Showcased VRV Systems at Duke Ellington Public School

An HVAC solution was the headliner for an event on Feb. 19 at a 121-year-old building in the nation’s capital named after one of America’s greatest composer-musicians. The event at Duke Ellington School of the Arts demonstrated how stepping beyond traditional non-inverter HVAC systems can preserve a building’s historical architecture, enhance energy efficiencies, minimize noise, and earn design-award accolades.




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Ductless Split System Innovations That Matter to Your Bottom Line

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.




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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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Expert Advice on Navigating that First A2L Installation

Manufacturers are starting to introduce their A2L systems in the U.S., so contractors and technicians must learn how to service and install this new equipment.




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Advice for the First A2L Installation

With the impending deadline right around the corner, manufacturers have started introducing their A2L systems in the U.S.




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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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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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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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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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Don’t Overlook Cleaning the Evaporator Coil 

Cleaning evaporator coils in a walk-in cooler can be challenging, but it needs to be done in order to keep the system operating efficiently.  




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Are Geothermal Heat Pumps the Key to a Cleaner Planet?

Geothermal energy can be used to heat and cool commercial buildings. The highly efficient systems that make this possible are geothermal heat pumps.




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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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Heat Pump Awareness Grows from Residential, Commercial Customers

Consumer awareness and opinion of heat pumps are both improving, along with the technology. Manufacturers see a strong market ahead, although some challenges remain.




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Washington State Pushes for Heat Pumps

Heat pumps for both space and water heating will be required in most new homes in the state of Washington beginning next July.




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The 9 Types of Heat Pumps

As the U.S. moves toward electrification, heat pumps are becoming more popular, which will likely increase sales in the coming years. The key is to know which type of heat pump will work best for an application, as there is a wide range of equipment from which to choose.




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Energy Savings, New Technology, Incentives: The Market for Geothermal is Heating Up

Though geothermal systems can cost several times more than traditional HVAC units, the energy savings may be substantial.




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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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Moisture Control for Heat Pumps

When it comes to moisture control, sizing the heat pump correctly is the most effective step an HVAC contractor can take.




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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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In Line for Federal Money for Heat Pumps, OEMs are Ready to get to Work

As the federal government plans millions in grant funding to boost heat-pump manufacturing in the U.S., a big player in the market as well as a newcomer are thrilled with the opportunity.




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Creating Thermal Energy Networks in Rochester, Minnesota

As Rochester city leaders set the ambitious goal of reducing greenhouse gas emissions by 50% by 2030 and 100% by 2050, the challenge is now how to follow through.




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Geothermal and Decarbonization

Decarbonization and electrification, the refrigerant transition, and incentives were big topics among geothermal companies at the AHR Expo. Consumer education and ease of product serviceability were also discussed.




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How A Water-Source Heat Pump Works

To help the industry better promote geothermal heat pump technology, it first needs to have an understanding of exactly what is going on during its heating and cooling process.




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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.




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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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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.




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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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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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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.




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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.




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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.




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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.




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Defining and Calculating Voltage Imbalance

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




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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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See What’s Possible at the New UTC Innovation and Technology Center

United Technologies Corp. (UTC), the parent company of Carrier Corp., recently opened the new UTC Center for Intelligent Buildings in Palm Beach Gardens, Florida.




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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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Industry Responds as Companies Commit to Battling Climate Change

Corporate America is making pledges to take action against climate change, which is opening up opportunities for HVAC contractors.




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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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Industry Negotiates RTU Efficiency Standards

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.




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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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Starting Up Idle HVAC Equipment after Summer Vacation

There are things contractors can do to get school equipment back online and ensure it’s operating as efficiently as possible in time for the first school bell this fall.




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Commercial Cooling Showcase 2016: Summer Heat No Match for HVAC Cooling Equipment

The manufacturers provided all of the data included in the product grid as well as the photo feature. Therefore, any questions should be directed to them via the contact information provided in the photo feature section.