(916) 381-4611 Serving Northern California (see map)


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Hitting Homeruns at Raley Field with Pelican T-Stats

Pelican Thermostat in Raley Field Suite with Logo
Pelican Mesh-network Thermostat at Raley Field Raley Field is a unique and challenging set of buildings and environments. The facilities have the needs of an office building and a hotel, as well as the special needs of a data center and huge heat generating equipment (like an enormous scoreboard). To manage these diverse needs and physically spread out locations, COAC delivered a solution that provides energy savings, full, flexible and immediate controls from anywhere at a very affordable price. The solution was the Pelican Wireless System.

Pelican Mesh Network Graphic The Pelican system automatically creates an advanced mesh network where all the thermostats communicate with each other and the gateway simultaneously. This enables thermostats to be controlled even if they are not directly connected to gateway.

The system allows owners and property managers to access a simple-to-use, dynamic and powerful management platform for their building with full diagnostic and trend data right on any internet enabled device, including their smart phones. This is a user-friendly solution to more enhanced building controls at a relatively budget price.

For more information, watch a live demo or to see if the Pelican System is the right solution for your building, contact COAC’s John McAlpine at 916.381.4611.

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New Video: Caltrans Fan Wall Installation Time Lapse

Over the Memorial Day Weekend, the Cooper Oates Air Conditioning Construction Team demolished an enormous (12 ft. x 15 ft., 107,000 CFM) circulation fan and installed a Fan Wall at the Caltrans Headquarters building in downtown Sacramento. The Fan Wall consisted of fifteen individual, 300 lb., fan cubes that provide much needed redundancy and significant energy savings.

NO downtime was allowed for this project which was a critical infrastructure upgrade for an aging, essential services building with over 1,400 employees.

The project began right at 5:00pm on Friday of the Memorial Day Weekend and was fully installed and ready for tenants by Monday at 3:00pm.

 

Demolishing a 12 foot circulation fan at the Cal Trans Building

Cal Trans Massive Circulation Fan with Man LRHere is the before picture of the 12 ft. tall x 14 ft. wide circulation fan that the team from COAC demolished to make way for the new, more redundant and efficient, fan wall.

Stay tuned for the time lapse video of the demolition and installation of the new Cal Trans Fan Wall.

Cal Trans Building New Fan Wall Completed over the Memorial Day Holiday Weekend

Cal Trans Fan Wall, COAC, Mechanical Contractor

The COAC Installation Team just completed a challenging, time-crunched project at the Cal Trans Building across from the State Capitol. The project entailed de-constructing and dismantling an enormous single 12 ft by 12 ft. 100,000 CFM / 60 horsepower circulation fan and replacing it with a more energy efficient and significantly more manageable fan wall. The fan wall was made up of 15 integrated, independently controllable Hunt Air fan cubes that generate as much or more than the required 100,000+ CFM of air flow. The final size of the cube array, not including the supporting steel superstructure, was 16.25 ft. wide by 11 ft. tall. The entire disassemble, removal, preparation of new opening, and installation of the 15 cubes was completed in just under 70 hours during the long Memorial Day weekend with no work disruption to the Cal Trans tenants. All of the month’s long planning, creative solutions and great teamwork certainly paid off. Well done team!

Stay Tuned for the Time lapse video of the deconstruction and installation of the fan wall.

 

Easy Trick to Save Energy Dollars with Your HVAC System

dirty and clean coil

Dirty Coil (left), Cleaned Coiled (right)

Coil Cleaning Is a Money Saving No-Brainer.

Its not really a trick just some good maintenance. Out of all the preventative maintenance steps you can take to ensure your building’s HVAC system works at its peak efficiency, having your coils professionally cleaned is one of the easiest and can give you the best return on your investment over time.

Coils are pretty simple by design. They come in a variety of sizes, and the size has been engineered to do its job according to the size of the area you are cooling. Coils consist of numerous small, metal fins that allow air to move across them, transferring heat in the process and allowing the heating or cooling process to occur smoothly.

The problem is air contains contaminants such as cottonwood fuzz, dirt, pollen, dust, grease, mold spores and moisture, which can settle on a coil’s surface and build up, acting as a roadblock to air flow and reducing a unit’s efficiency. When this happens, an air conditioning unit has to work harder to do the same amount of work, thus using more energy – more than 30 percent in some cases, according to experts.

In addition, other components such as the compressor are at risk of breaking down due to the increased stress on the air conditioning equipment. Hot temperatures + no compressor = no cooling = unhappy building occupants = costly repairs. Other factors such as indoor air quality also can be negatively affected due to contaminants like mold and bacteria residing in your coils.

There are numerous coil cleaning products on the market today and a variety of methods to cleaning a coil. While many businesses have maintenance staff that clean coils, it’s never a bad idea to have your coils cleaned professionally by a trusted service partner as a service professional may find other problems that need to be addressed.

Remember, preventive maintenance steps like coil cleaning offer the following benefits to you and your heating and air conditioning equipment:

  • Reduced risk of breakdowns
  • Increased equipment life
  • Better indoor air quality
  • Improved equipment efficiencies & reliability
  • Reliable building tenant comfort

For more information about coils or to schedule a professional coil cleaning, contact COAC’s James Biagioni at 916.381.4611.

R-22 – Fading Fast

Sara Jackson - Headshot closeup sml

Sara Jackson COAC Customer Service Manager

As HVAC system owners and contractors, we should all be paying attention to the major changes in the refrigeration markets occurring in 2016. As the complete phase-out of R-22 continues, the EPA has declared that in 2016 only 18 million pounds of R-22 can be produced or imported. The 2016 amount is down from 51 million pounds allowed in 2014, and will be decreasing significantly each year until December 31, 2019, when no new or imported R-22 will be permitted in the United States.

The R-22 supply dwindles and the “normal to warmer-than-usual” temperatures, predicted by meteorologists, for this coming summer will assuredly increase the demand. R-22 prices were up 15% in the final quarter of 2015 and are anticipated to reach record levels by the end of 2016. Refrigerant distributors will be subject to allocation limits and supplies will become scarce. The possibilities of imported counterfeit R-22 is a real and likely possibility, therefore purchasers will have to be vigilant in their research and trust who they are buying from.

r-22 Fading AwayAnother notable change will be the end of production of the “dry-shipped” unit (equipment designed to use R-22, yet not containing any refrigerant at the time of sale/shipment). As of the end of February, manufacturers are no longer able to sell this type of equipment. This means all new units will be required to use other types of refrigerants.

The phase-out will force owners of R-22 equipment to replace their systems or transition to an environmentally approved retrofit alternative for their legacy systems. Manufacturers are coming to the table with new refrigerants such as Gentron 422D, Performax LT, and Solstice N40. These next generation products all have different characteristics and performance specifications. When retrofitting with these alternative refrigerants it will be important to note the lubricant choice and its effect on system performance and to recognize the need to replace elastomers, O-rings, and possibly system valves during that retrofit. In this rapidly changing industry, it will behoove the consumer to research the options and regulations and form solid, reliable relationships with well-informed service providers they can trust to do the job right and keep the comfortable air flowing.

Alternative Refrigerant Links:

422D https://www.honeywell-refrigerants.com/americas/product/genetron-422d/

N40 https://www.honeywell-refrigerants.com/americas/?document=solstice-n40-data-sheet&download=1

Performax LT https://www.honeywell-refrigerants.com/india/?document=honeywell-genetron-performaxlt-technical-specs&download=1

 

Mesh Networked Thermostats Help Raley Field Suites Save Energy

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Raley Field Suites

New wireless internet-programmable thermostats are becoming an affordable alternative to the wired HVAC building controls of the past. Several types of these retrofit friendly and affordable thermostats are now available for installation in any commercial building, depending on your needs and application.

COAC recently installed the Pelican advanced thermostat in the suites at Raley Field. The Pelican controls multiple stages of heating and cooling, was easy to install and program and has all of the features you would expect from an advance thermostat.Mesh Network tstats

Utilizing the existing thermostat wires to each rooftop unit, no network cabling and only a single gateway, the Pelican thermostat automatically routes and repeats the wireless signal between each device and is able to spread the wireless communication from the zone controller to every zone through-out a commercial building with ease. In the case of Raley Field, only one gateway was needed to internet-enable and control all of the suites. The initial thermostat setup and ongoing scheduling management is done through the Pelican web-app. The app provides an intuitive control for managing multiple thermostats, schedules and access to historical temperature and HVAC usage data at any time. The thermostat also continuously monitors the health of the HVAC systems and sends immediate maintenance alerts to authorized personnel via email or text message at the first sign of a problem. All controls are accessible from your smart phone or desktop. Contact COAC’s John McAlpine at 916.381.4611 to see how this advanced thermostat can give you the control over your HVAC system at a very affordable price.

Preparing For a Future Without Any R-22

R-22 bannedThe EPA’s release of the R-22 phaseout schedule has provided a better idea of how fast R-22 refrigerant will be eliminated. Building owners and managers can now plan for it over the next few years. A big part of that preparation is education.

R-22 will be gone soon so now is the time to make decisions about your HVAC equipment. In Sacramento, 70-80% of commercial buildings still have R-22 systems in operation. Whats your plan?

Read More Here

 

 

How Creativity Can Maximize Productivity

Creativity aids productivity

Work Smarter, Not Harder

Feeling out of “juice”? Being able to harness your creativity in business, and in life, is a skill that can be nurtured, and drawn upon when needed. Steve Jobs once said, “Creativity is just connecting things.” So what are you doing to “connect things”? In a short piece found on the Huff Post Blog, it encourages you to feed your creative pipeline, make connections, and then apply the ideas.  Read More Here

Dealing with HVAC Noise Complaints

Bothersome HVAC noises aren’t just annoying for occupants, they can also indicate HVAC dysfunction. Examine possible causes to determine where the problem lies. You may end up with a solution that can both save energy and contribute to occupant satisfaction and productivity.  Read More Here

HVAC Noise pathways