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GEA's Global HVAC Technology Blog

GEA's Global HVAC Technology Blog covers a range of topics including:

  • Core HVAC Technologies
  • Technology & Patent Evaluation
  • Manufacturing Technologies
  • Product Quality Improvement
  • Materials/Failures/Corrosion
  • Product/Technology Commercialization
  • Business Strategy Development
  • New Factory Design & Equipment

We'll draw upon our range of experts to provide comments, insights, technical articles and a little humor from time to time

We encourage your participation and feedback!

U.S.' Most Energy Efficient Cities-How Do They Do it?

Posted July 01, 2015 8:36 AM by larhere

Mayors and local lawmakers in America's largest cities continue to take innovative steps to lower energy costs for consumers and businesses, increase their resilience, and reduce pollution through increased energy efficiency, according to the 2nd edition of the City Energy Efficiency Scorecard, released recently by the American Council for an Energy-Efficient Economy (ACEEE).

The top 10 US cities for energy efficiency are:

  1. Boston
  2. New York City
  3. Washington, DC
  4. San Francisco
  5. Seattle
  6. Chicago
  7. Minneapolis
  8. Portland
  9. Austin
  10. Denver

How Are They Doing it?

  • Government operations. Leaders in efficiency in local government operations have set policies to increase efficiency in city government, procurement, and asset management.
  • Community initiatives. The top-scoring cities have both the systems to track progress toward efficiency-related goals for the whole community, and strategies to mitigate urban heat islands. They also have efficient distributed-energy systems, such as district energy and combined heat and power, and policies or programs to plan for future ones.
  • Buildings. Leading cities have adopted or advocated for stringent building energy codes, devoted resources to building code compliance, established requirements and incentives for efficient buildings, and increased the availability of information on energy use in buildings through benchmarking and transparency policies.
  • Utilities. The leading citieshave energy efficiency programs that offer high levels of savings. These cities also have productive relationships with their utilities in program implementation and access to energy data.
  • Transportation. Cities with the top transportation policy have initiatives which include location-efficiency strategies, shifts to efficient modes of transportation, transit investments, efficient vehicles and vehicle infrastructure, and energy-efficient freight transport.

Where Does Your City Rate?

Download the complete report

How can GEA help your company become a leader in High Efficiency HVAC equipment and systems?

Editor's Note: CR4 would like to thank GEA Consulting's President, Larry Butz,, for contributing this blog entry, originally appearing at

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MHI Chooses HFO-1233zd(E) for New Centrifugal Chillers

Posted June 18, 2015 9:57 AM by larhere
Pathfinder Tags: HFO New Refrigerants refrigerants

Mitsubishi Heavy Industries (MHI) has announced the availability of their new ETI-Z Series Centrifugal chillers based on environmentally friendly HFO-1233zd(E). Trane previously announced the availability of their Series E CenTraVac chillers with this new refrigerant which is also seeing increasing use in the foam blowing industry. The Trane offering ranges from 2,600kW to 14,000kW; MHI's new ETI-Z Series comes in sizes from 280kW to 2,460kW with plans to extend the line up to 5275kW.

High performance is achieved by reducing motor drive-energy loss through the adoption of a compressor with high-speed direct motor drive which allows elimination of gears and use of fewer bearings. Rated COP (coefficient of performance) of 6.7 is claimed.

The new ETI-Z chillers will begin shipping in September.

Read More

Editor's Note: CR4 would like to thank GEA Consulting's President, Larry Butz,, for contributing this blog entry, originally appearing at

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US HVAC Equipment Market and Forecast

Posted May 20, 2015 1:00 AM by larhere

The Freedonia Group just released a 300+ page market study titled US HVAC

Equipment Market and Forecast

which presents historical demand data for 2004, 2009 and 2014 plus forecasts for 2019 and 2024 by fuel type, equipment type and market.

Among the analyses, observations and conclusions;

  • Shipments of HVAC equipment will grow 6.0 percent per year through 2019 to $16.5 billion
  • Demand for HVAC equipment is forecast to increase 6.8 percent annually through 2019 to $20.4 billion
  • Imports will account for a growing share of demand for all HVAC products, exceeding 25 percent of the total in 2019
  • Regulations regarding refrigerant usage and equipment efficiency will continue to have a positive effect on HVAC equipment demand
  • Unitary air conditioners will continue to comprise the largest share of total HVAC system demand, accounting for 44 percent of sales by 2019
  • Heat pumps and warm air furnaces will both post the fastest gains through 2019
  • The nonresidential market will continue to comprise the larger share of overall HVAC equipment demand in value terms, due to the larger size of these HVAC systems
  • Growth in the residential market will significantly outpace that in the nonresidential market through 2019
  • Electricity is by far the leading fuel source used to power HVAC equipment. Geothermal energy will post the strongest gains of any fuel source through 2019 from a low 2014 base
  • In both residential and nonresidential markets, replacement purchases will continue to account for the bulk of sales

The study (available at Fredonia Group) considers market environment factors, examines the industry structure, evaluates company market share and profiles 32 US industry competitors, including Daikin, Ingersoll- Rand, Lennox and United Technologies. A summary of the report can be viewed at Global Information Research.

View Recent Blog Posts

Top HVAC Trends for 2015

50%+ Increase in US Shipments of AC and ASHP in December

HVAC Industry Shows Strength

Editor's Note: CR4 would like to thank GEA Consulting's President, Larry Butz,, for contributing this blog entry, originally appearing at

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Corrosion Analysis:Implementing Change

Posted May 13, 2015 6:26 AM by larhere

In the first post in this series "A Real Corrosion Story" I discussed the wide range of corrosion types, causes, solutions etc.. I outlined a six-step process I've used in analyzing and resolving corrosion problems:

1. Identify the corrosion mechanism.

2. Understand the environment, both external and internal.

3. Understand the equipment - materials of construction, operating cycles, hours.....

4. Identify alternatives - materials, coatings, limiting operating envelope, changing the environment (water treatment, alternative lubricants/refrigerants, filter the air, etc.), redesign the machine (better drainage, eliminate contact of dissimilar metals, .....)

5.Implement change.

6. Monitor results.

This week we'll expand on the fifth step: Implementing Change.

Implementing change in engineering and manufacturing is rarely as simple or straightforward as we engineers would like to believe it should be. Overcoming organizational inertia and getting all of the components involved in change:

  • engineering documentation,
  • drawings,
  • purchasing documentation,
  • manufacturing process documentation,
  • logistics,
  • quality documentation,
  • etc., etc.

prepared and staged properly requires careful planning, training and attention to detail. Because oftentimes the 'organization' doesn't want to change, it is absolutely critical to manage all the required details as perfectly as possible.

Though nobody would ever say it, whenever we're implementing change, there are people out there looking for, hoping for, waiting for us to fail. No matter how carefully we tread, trying not to ruffle feathers, or blame anybody for a failure problem there are people who will feel threatened or uncertain and it is our responsibility to make sure change is implemented as smoothly and seamlessly as possible.

Don't assume others are going to manage the change for you; it is up to you as the change agent to dot all the I's and cross all the T's and make sure the change happens.

Editor's Note: CR4 would like to thank P J Sikorski, GEA Consulting Associate, for contributing this blog entry, originally appearing at

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China's Impressive " Sky City" Gets Downsized-Still Impressive

Posted April 29, 2015 4:21 PM by larhere

We have been following the China Sky City project to build the world's tallest building, 220 stories, with prefabricated modules built in advance in factories and assembled on-site, in record time and at significant cost savings.

After battling quality issues, permit discrepancies and safety concerns the building design was downsized to 97 stories, then to 57 floors because of concerns it was too close to a nearby airport.

Although not the 220-story skyscraper builder Broad Sustainable Building started with, it is impressive nonetheless, most notably, the 19 days to construct this 57 story building.

The project, now called Mini Sky City, was built by 1,200 workers and includes 800 apartments and working space for 4,000 people. The unique design has 19 ten meter high atriums to facilitate vertical farming and a community gathering areas.

The efficiency of erecting the building was a remarkable 3 stories per day. The high efficiency theme is continued in the building design with 4-pane glass windows, 100 percent outside air, 99.9 % air filters, heat recovery and a combined heat, cooling and power generator unit efficiently built into custom HVAC modules.

Mini Sky City is touted for it's projected low energy use at 80 percent less than a conventional building with further environmental friendliness coming from a large reduction in dust due to the 15,000 trucks of concrete that would have been used for a building with conventional construction methods.

You might also be interested in our prior blog posts

World's Tallest Building (A Prefab) - Update From China

Prefab Skyscrapers Reach for the Heavens Reshaping HVAC

Editor's Note: CR4 would like to thank GEA Consulting's President, Larry Butz,, for contributing this blog entry, originally appearing at

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Top HVAC Trends for 2015

Posted April 08, 2015 9:11 AM by larhere

Attendees were surveyed at the recent AHR Expo in Chicago about Trends most impacting the HVAC Industry. Not too surprising the list was topped by Energy Efficiency as the key trend followed by Costs. The survey was conducted by the ASHRAE Journal and gathered more than 700 responses.

In the order of importance:

  1. Energy Efficiency - "I would expect energy efficiency to be a major driver for most markets with rising energy costs."
  2. Costs/the Economy - Costs/the Economy "Rising costs for mandated equipment."
  3. New Technologies - "DOAS units connected directly to terminal units, eliminating large AHUs and large insulated ductwork."
  4. Training/Staffing - "How do we hire, train, grow, develop, replace, the sales, operations and technical personnel who are retiring?"
  5. O&M - "Contractor's ability to effectively start up and maintain newly released high-efficiency products."
  6. Government - "Regional standards and how it will affect system sales."
  7. Refrigerants - "Concerns about the transition from R-404A to something else."
  8. Competition - "Every Tom, Dick and Harry trying to do HVAC."
  9. Environment - "Energy saving and environment-friendly products."
  10. Sustainability - "Minimized energy consumption using heat recovery, net zero. Carbon reduction"

You might also want to view these recent blog posts:

The Future of Green Collar HVAC Work

Manufacturers Optimistic - But Skilled Workers....?

Reshoring Gains Momentum

HVACR Industry Sees Global Warming as Business Opportunity

NAR HVAC Market Expecting Strong Growth

10 Predictions for US High Performance Building in 2014

Editor's Note: CR4 would like to thank GEA Consulting's President, Larry Butz,, for contributing this blog entry, originally appearing at

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