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Slash your parking garage energy bills by downshifting your exhaust fans using demand control ventilation systems

Having a parking garage in your apartment or commercial building is very convenient and it will make your tenants happy. At the same time it will probably drive your utility bill way up. In a large office building and/or mixed-use development, parking garage ventilation can represent 30% or greater of the property’s total annual energy bill, consuming upwards of 400,000 kilowatt hours (kWh) per year.  In some cases, ventilating the garage consumes more energy than lighting the facility.

Enclosed parking garages in North America are subject to ventilation standards established by the International Mechanical Code (IMC) and the American Society of Heating, Refrigeration and Air Conditioning (ASHRAE).  The IMC and ASHRAE stipulate garage ventilation systems must run continuously during building occupied hours, unless the facility is using a sensor-based demand-controlled ventilation (DCV) system.

COSTAR 24VC-e manufactured by American Ventilation Control Systems keep buildings CO-free and use exhaust fans only 5-10% of the time. If used in combination with a variable frequency drive COSTAR 24VC-e will allow you to control the speed of your fan. Running a fan at 40% speed saves 90% of the energy. A VFD further controls and soft starts the motor to save additional energy and extend the life of both the motor and bearings, and drastically reduce belt wear and tear. This soft start VFD’s also provide noise reduction. Many exhaust fans are noisy at full speed and may bother tenants or guests. The installation of a VFD can reduce noise by running the fan at reduced speed.

Stricter garage ventilation performance standards have prompted technological innovations whereby our garage demand control ventilation systems can now routinely reduce energy consumption while the garage fans run continuously.

Equally relevant, these advancements ensure the health and safety of those who work in the garage and those who might live or work above it.


Leaving Your Keyless Ignition Car Running Poses the Risk of Carbon Monoxide Poisoning

The push button in your car that starts the engine instead of turning a key is called a keyless ignition. It’s become a standard feature on many new vehicles in the recent years. If you walk away with the fob and forget to turn off the car, consumer safety advocates say, keyless ignitions could pose a danger.

Noah Kushlefsky is an attorney who has represented several families whose loved ones have died from carbon monoxide poisoning after the key fob was removed and the car was left running. Kushlefsky explains: "When you're disassociated from the car by removal of the mechanical key, it's an easy step to forget". "It's a senseless situation that should never occur and should never have occurred."

Most keyless ignitions allow drivers to walk away from their car with their key fob and leave the motor running. There are an estimated 5 million keyless cars like this on the road, according to a lawsuit against 10 automakers filed in August in a Los Angeles, California Federal Court, which critics say could put your family at risk.

In June 2015 Cesare Fontanini, 50, of Highland Park, Illinois stopped by his parents’ house to have an espresso and found both his parents, Rina, 76, and Pasquale, 79, dead after they accidentally left their car running in their attached garage.

The 2013 Lincoln MKS that Fontanini’s parents drove had a push button, or keyless ignition. That model of car does make an audible warning, but investigators say that his mother Rina put the key fob in her purse, despite that. Officials say the carbon monoxide from the engine built up in the garage and seeped its way into the house, eventually killing them both.

“I was unaware that there was a problem with keyless ignitions until this happened to my parents,” Fontanini said.

Most cars with keyless ignition do have some kind of visual or audible alert when the car is left running with the key fob not in the car. Some cars even have an automatic shut off feature, which turns off the vehicle after 30 minutes of inactivity.

Carbon Monoxide has been the main cause of accidental poisoning deaths in America for many years. Like many other similar tragedies the death of the Fontanini couple could have been easily prevented by purchasing and installing a carbon monoxide alarm. Alarms should be Underwriters Laboratories (UL) approved. The cost is minimal and in view of the possibility that it may save the lives of you and your family it is a bargain. Install a CO alarm on every floor of your home and within hearing range of each sleeping area. Carefully follow manufacturers’ instructions for their placement, use, and maintenance. Unlike smoke alarms, CO alarms may expire after several years. If you already have a carbon monoxide alarm which doesn’t show an expiration date, replace it immediately.

BIOLOGIX Residential Carbon Monoxide Alarm is the only Carbon Monoxide Alarm made in the USA. It features The Most Reliable technology to detect this very toxic gas according to a report by Lawrence Berkeley National Laboratory (LBNL Report 40556).  These CO sensors are made in America. Protect your family from potentially harmful levels of carbon monoxide in your home or garage with the BIOLOGIX.




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American Ventilation Control Systems


Toll Free:  844-587-8803 Web: Email:

Announcing the ETL certification of the new generation of COSTAR® ventilation controls!



The ETL Listed Mark is proof that the COSTAR® 24VC-e has been independently tested and meets the UL published standard 2075.The ETL Mark is proof of product compliance to North American safety standards. End users recognize ETL certification as a symbol of safety. Authorities accept the ETL listed Mark as a proof of product compliance to published industry standards.

ETL product safety certification program includes the same testing, listing, labeling, and follow-up inspection services as competing certification marks (such as UL, CSA, and others)


Powerful continuously running ventilation systems raise your energy usage sky high and result in huge electric bills. The COSTAR® 24VC-e lowers operating costs by activating the fan only when required to maintain good air quality while enhancing safety by alarming if dangerous CO conditions are detected. In fact, in many cases, installation of CO monitoring and ventilation systems can generate up to 85% savings in energy costs. COSTAR® 24VC-e ventilation control solution monitors unsafe levels of carbon monoxide (CO) in your parking garage to protect the health and well-being of your building’s occupants. It is essential to keep your parking structure properly ventilated to eliminate carbon monoxide.


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COSTAR® 24VC-e carbon monoxide detecting ventilation fan controller is designed for use where ventilation fans are needed to prevent dangerous accumulations of carbon monoxide (CO) from engine exhaust or combustion appliances. The COSTAR® 24VC-e features an electrochemical sensor and a microcomputer-based CO detection circuit. The microcomputer provides overall supervisory control.
It measures CO level and calculates CO dose. It also self-tests the internal electronic circuit and signals a fault warning if a malfunction is detected. Ensure safety of your building workers and occupants by installing our new COSTAR® 24VC-e ventilation control. The product adheres to the strictest NIOSH requirements.


COSTAR® 24VC-e, unlike many competitors’ products, is calibration free. Just replacing the sensor every 3 years saves a lot of maintenance cost. Each individual sensor is factory calibrated. Neither expensive field adjustments nor calibration kits are required. A signal indicating sensor replacement is given when necessary. There is a 12 Year PC board end-of-life. The unit will give a warning 60 days prior to the PCB end-of-life.
Although only required for systems that are connected to a central panel these units have in field CO test capability. When the test button is pressed, the unit goes into an accelerated test mode for about 10 minutes and will beep 3 short 100 millisecond beeps once before going into the test mode. In this mode, there are no delays associated with the fans or siren. This allows someone to spray some CO on the sensor and see how it responds. After testing the unit returns to normal operation and will beep 2 short 100 millisecond beeps before returning to normal operation.

Contact American Ventilation Control Systems today for a healthier tomorrow and a growing business opportunity.

11211 Sorrento Valley Rd Suite Y
San Diego, CA 92121 USA

Phone: 858-587-8803
Fax: 858-587-8804

Toll Free:  844-587-8803