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Understanding Energy Recovery in Rotary Heat Exchangers

Heat recovery systems can be divided into two categories based on the thermal parameters of the system: Systems with high and low thermal parameters.




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Unico Inc.: Separate Module AHU

Delivering 1 to 1.5 tons of nominal cooling, this formerly single packaged unit is now a separate module.




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Unico Announces Alliance With Ecoer

Unico System, in conjunction with Ecoer, announced a corporate alliance at the recent AHR Expo that will offer an inverter heat pump optimized to pair with Unico’s small duct air handlers.




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Unico Makes High Efficiency EC Motors Standard for All Blower Models

Unico Inc. announced it is making highly efficient EC motors standard for all blower models within its modular air handling units.




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Tadiran Holdings Ltd.: Condensing Unit

This low-profile condensing unit is designed to maintain a building’s aesthetic by hiding the unit within the building and eliminating the need for outdoor installation.




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SPX Announces Purchase of SGS Refrigeration Inc.

SPX Corporation has completed the acquisition of SGS Refrigeration Inc., based in Dixon, Illinois.




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Time to Refine Summer Tune-Up Strategies for Condensing Units

Most outdoor units will have survived another winter intact, but nearly all will need some routine (or added) TLC to get into game shape.




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The R-410A Condensing Unit Conundrum

EPA is revisiting a rule that would allow R-410A condensing units to be manufactured indefinitely to service existing equipment.




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Ice-O-Matic Announces Personnel Changes to Sales Team

Alex Tappé, vice president of sales and marketing at Ice-O-Matic, announced organizational changes to its sales team.




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New Ice Micro-Factory Unveiled In Florida

The world’s first autonomous ice micro-factory is designed to help eliminate middle-mile logistics to reduce global greenhouse gas emissions, water waste, and plastic pollution.




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Ductwork Remains an Untapped Market for Many HVAC Contractors

Ducts play a crucial role but are often overlooked.




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Three HVAC System Vital Signs That Help You Identify Unhealthy Systems

Poorly installed HVAC systems work twice as hard as they should and suffer from a wide variety of invisible health problems.




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How Central Return Grilles Create Unintentional Comfort Problems, and How to Solve Them

In the end, it's about airflow control. Unless your solution involves airflow and pressure measurement, you're guessing whether the repair worked.




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Maryland Announces Five New Apprenticeship Programs

These new programs and reactivations include occupations such as machinist, HVACR technician, electrician, plumber, cement mason, ironworker, operating engineer, and a new occupation in certified cyber analyst operator.




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Auburn Community Hospital Retrofit Offers Cooler Operating Rooms and Lower Energy Bills

The new comfort solution reduces energy use by 50 percent by using water more efficiently than the legacy system.




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DOE Announces $11.4M to Advance Efficient Drilling for Geothermal Energy

The awardees will focus on early-stage R&D projects exploring innovative technologies for drilling geothermal wells that show the ability to reduce non-drilling time, improve rates of penetration, and identify methods to accelerate the transfer of geothermal drilling and related technologies from the laboratory to the marketplace. 




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West Virginia Ups Funding For HVAC, Capital Improvements at Schools

Seven of the awards include funding specifically for HVAC-related projects.




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Artificial Intelligence Can Help HVAC Contractors Run a Better Business

Contractors have to spend the time to effectively choose the right business management software that allows AI capabilities to fold into their day-to-day operations with ease.




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Promotions Announced at Tech Provider XOi

In their new roles, enterprise account executive Austin Piazza and account executive Lindsey Fisher are responsible for developing and enhancing relationships and educating the industry about XOi’s capacity to help contractors solve the skilled-trades gap and grow their businesses.




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Luxaire®, a brand of Johnson Controls: Rooftop Unit Line

These products are designed to serve both the new construction and replacement markets.




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Johnson Controls Launches New YORK Rooftop Line

The YORK brand of JCI is launching a line of RTUs designed to exceed the DOE energy efficiency standards, which will take effect January 1, 2023.




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Johnson Controls Encourages Upward Mobility With Rooftop Units

At a booth thick with traffic at the AHR Expo’s, commercial product manager Schlegel talked about Johnson Controls’ new YORK Sun Choice rooftop unit.




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Rooftop Units Incorporate Tech for Safety, Efficiency, Remote Monitoring

Commercial rooftop units feature a host of intelligent solutions to improve efficiency and ease of service/installation.




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Replacing R-410A in Rooftop Units

This phasedown has been expected for a while, which is why OEMs have been working diligently to identify alternative refrigerants that are safe and efficient.




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Rooftop Unit Manufacturers Work Toward 2023 DOE Efficiency Standards

For many manufacturers, higher efficiency systems have been in the works for a while, but the 2023 DOE standards, pandemic, and current supply chain issues have added pressure.




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How New Efficiency Standards Affect Rooftop Units

While new DOE standards drive innovation and opportunity within the HVAC industry, they also add pressure and complexity for manufacturers.




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Strong Demand for HVAC Rooftop Units

Big-picture economic factors, such as inflation and rising interest rates, haven’t had much impact on RTU sales.




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Foundation Helps Crash Victim With New HVAC System

John Milligan, who had been an equipment operator and a member of the International Union of Operating Engineers, was left paralyzed from the waist down by a car accident in 2022.




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Howard Community College Receives $50,000 Grant to Support Workforce Development and Skilled Trades

The grant will provide state-of-the-art technology and equipment for industrial training programs such as mechatronics, information technology and cybersecurity, HVAC, construction management, welding, and more.




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Zonex Launches New BACnet Product for its Gen X System

At the core of the BACnetIP solution is the QuickServer gateway, developed by a third-party integrator. This BTL (BACnet Testing Laboratories) certified gateway serves as a communications bridge between the Gen X System and a customer’s building management system.




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Counterperson of the Year Works at NOLA Distributor

Philip Laiche exemplifies the same values that make Malco great: dedication to excellent customer service and going above and beyond to ensure contractors have the Malco tools they need to get the jobs done, a press release from Malco Tools Inc. said.




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Spectronics Announces Latest Generation of Leak Detection Dye

Spectronics Corporation is a 60-year-old company with a new generation of Made in the USA refrigerant leak detection dye — AR-GLO 5.




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HVAC Chiller Offerings: A Product Roundup

A product round-up of chillers on the market.




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Project Files: Episode 63 — University of Cincinnati Chiller Upgrade

Like many universities across America, the University of Cincinnati faced a major infrastructure challenge: having to operate aging central utility plants with older technology.




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A Beginning HVAC Tech’s Guide for Understanding Superheat

Much like subcooling, understanding and calculating superheat can be somewhat difficult for newbie technicians.




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The Makeup Air Unit Defined

OK, you’ve exhausted all of the existing air from an interior space; now how do you replace it? You bring in makeup air from another source. For the purpose of an HVAC discussion, your source will be mechanical equipment — makeup air units.




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Valent Air Management Systems, a business of Unison Comfort Technologies: Commercial Makeup Air Units

Heat-only, direct-fired, and indirect-fired makeup air units have been added to the company’s product line. 




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Modine Mfg. Co.: Makeup Air Unit

The unit includes a standard neoprene, vibration-isolated blower and motor for quiet operation.




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Modine Offers New Direct Fired Make-Up Air Unit

Ideal for cost-conscious applications that require 100 percent outside air, the new unit from Modine provides first-rate efficiency with a 100 percent thermal efficiency (92 percent sensible), and extends airflow capability to as low as 800CFM to cover far more applications than previously offered.




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Stelpro: Make-up Air Unit

The MUAA distributes tempered fresh air to provide maximum comfort to the occupants in well-ventilated homes. The heating elements modulate continuously, which allow fresh, hot air at a low cost.




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States Seek IRA Rebate Funding

California, New Mexico, New York, and Hawaii are the first states to apply for federal rebate money for high-efficiency equipment. Twenty-three states have received funding to set up and manage rebate programs.




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Navigating the A2L Transition: Insights from the International Code Council

New A2L-related code requirements will impact HVAC system installation and include warning labels, ventilation, leak detection, and limits on refrigerant amounts for comfort air conditioning.




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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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Cooper&Hunter: Single-Zone Mini-Split

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.




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Community Church Benefits From Unitary Variable Refrigerant Flow Retrofit

With over 1,000 Sunday service attendees and many church activities throughout the week, energy efficiency for the sake of cost savings was critical.




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A Little TLC Can Extend the Life of Condensing Units

In today's economy, cost-conscious end users want to extend their HVAC equipment lifespan as long as possible. Regular maintenance on condensing units can help maximize their longevity and performance.




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Understanding Voltage, Current, and Resistance

Technicians need to understand the basic electrical fundamentals and how they relate to each other in order to better troubleshoot electrical failures.




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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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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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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.