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


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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.

 

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.

SMUD’s energy-saving guru, Bruce Baccei, discusses ideas for saving energy with your roof-top HVAC units

Add-on Variable Speed Controls for RTUs


DCV, mechanical contractor
In a recent article published at the EnergyCentral website, Bruce Baccei of SMUD’s Energy R&D, discusses a topic that he has devoted years of his professional life to, HVAC efficiency.  In particular Bruce reviews the results of a Sacramento field test on a technology that averaged an energy savings of over 39%.

The addition of variable speed controllers to existing single speed HVAC units has proven to dramatically reduce energy consumption and the technology has other significant benefits. Products like Catalyst, also provide the value of fault detection, measurement of energy savings, adjustment of controls, email alerts, viewing performance and Demand Response all by way of the internet. Read Bruce’s article here.

For more information or an on-site survey showing how Variable Speed Controls, like those discussed in the article, can save your energy dollars contact COAC’s John McAlpine.