This week is Air Quality Awareness Week, which is promoted by AirNow to discuss the importance of healthy air for everyone. One vital part of air quality involves monitoring humidity and temperature, so using an accurate outside humidity and temperature sensor can have a significant impact.
Most air handling units (AHUs) use what is called an economizer cycle. This is when outside air is mixed with the return air to cool the building dependent upon the outside temperature. However, if the air is too dry and requires humidification to accomplish this process, your cost savings may have been eliminated due to the AHUs humidity control, which provides excessive steam for this humidification procedure to take place. Consequentially, sometimes based on weather conditions, your economizer may just be costing you money instead of saving it. Continue reading “Outside Air Humidity”
As cities around the world continue to grow, the need for parking becomes an integral part of new commercial and municipal building plans. Many building designers are finding ways to offer adequate parking in a limited amount of real estate. Two emerging trends to do so are enclosed parking garages and mixed-use parking garages. Both of these designs seek to offer users a comfortable way to park their vehicles, all while being near their final destination. This means that the parking facility and the commercial or residential buildings are not separated, but are integrated together into one building structure. Due to this integration, two major concerns arise. How do we ventilate the harmful exhaust from the vehicles while being so close to the populated areas of the building, which require clean air and how do we accomplish this in the most energy efficient way possible? The Dwyer® Series GSTA carbon monoxide/nitrogen dioxide gas transmitters offer the sensory inputs necessary for any building automation system to answer this very quandary in an efficient and low cost manner. Continue reading “Parking Garage Ventilation Control”
Differential pressure between two rooms prevents dust, particulates, and pathogens from entering or exiting one room and going into the other. Depending on the relationship between rooms, one room will be under positive pressure when referenced against the other. This positive-negative pressure relationship between two spaces is the main idea behind clean rooms and isolation rooms. To ensure the differential pressure relationship is maintained, a measuring device must be used.
Room pressure monitors and room status monitors measure, display, and transmit the differential pressure reading between two rooms. In general, room pressure monitors only monitor differential pressure. On the other hand, room status monitors monitor differential pressure and additional parameters such as relative humidity, temperature, air change, or door status. They are both used in critical applications that require critical low differential pressure relationships. Continue reading “What are Room Pressure and Room Status Monitors?”
Plants thrive on CO2 for growth while producing oxygen. One thing that many people do not know is that the optimal concentration for plant growth is over three times the atmospheric CO2 concentration today.1 This being the case, indoor gardens would be remiss if they didn’t attempt to elevate the CO2 levels in their environments to the ideal concentration. The most common way to increase the CO2 concentration is to use a propane burner to create CO2. The problem with having a propane burner in an enclosed space is that you need to know when to turn the burner on and off, as CO2 levels that rise above 1500 ppm are actually harmful to plants. Continue reading “Keeping it Green: Monitoring CO2 Levels in Greenhouses”
Educational facilities, or public and private institutions devoted to teaching students, differ in physical size and level of education programs. These institutions can range from preschool to university levels, all of which need proper heating, ventilation, and air conditioning (HVAC) systems and indoor air quality.