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


View Primary Service Area in a larger map

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.

.

COAC Construction Team Featured On Cover of ACHR News

ACRH News CovershotThe HVAC Industry’s largest publication, ACHR the NEWS, featured a COAC Construction Team image on the cover of the July 4th edition. The picture shows the COAC team lowering a specialty HVAC unit down through the roof to the floor of an expanding data center. This was a very unique challenge due to the difficult circumstances but the COAC came up with a workable and creative solution to getting the job done. Thanks to Greg Meyers of Emerson for including us in the article formation.

For more photos of this project, see the COAC Gallery Page: HERE

 

 

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.

 

Bob Knows: Winter Building Preparations

Robert Plotner Vice President Service Operations

There are many things to consider when preparing for winter operation of any building, but keep in mind these shoulder months offer a huge opportunity for energy saving.

As we approach the heating season, we need to be checking the heating cycles on all the air conditioning equipment, paying particular attention to the operation of the boilers. During the early hours of the morning heating may be needed to take the chill off but in the afternoon there may be a need for cooling.  A well-tuned building will only use the amount of heating and cooling needed to make the building comfortable.  Too often we find a building is overheating and overcooling and sometimes heating and cooling at the same time, missing out on a tremendous amount of energy savings.

Besides the HVAC systems, building owners should check and clear all roof drains, remove all roof debris and look for cracks or bubbles in the roofing that may indicate problems.  As a service for our customers, our technicians report any issues they may see while they are on the roof of any building, but a thorough exam should be on your winter prep list.

Don’t wait until you have bigger problems at critical times, now is the time to test and review your systems and insure that energy expenses are minimized and tenant comfort is protected. If you have any questions about your HVAC winter preparations, feel free to contact me directly.

Bob Plotner,
Vice President, Service Operations

 

 

Mesh Networked Thermostats Help Raley Field Suites Save Energy

Link

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.

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

3 Ways to Improve Winter IAQ & Productivity

Winter IAQ solutionsAccording to some World Health Organization experts, 30% of commercial buildings in the U.S. have poor IAQ, which is linked to respiratory illnesses and allergies. In addition to shouldering the medical expenses of sick workers, U.S. businesses experience as much as a 33% drop in worker productivity due to poor IAQ. But there are ways to decrease airborne disease transmission and have a healthier building. Read More Here

 

 

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.