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”
ASHRAE 62.1 Standard for Ventilation for Acceptable Indoor Air Quality provides recommendations for minimum ventilation rates and other parameters to ensure good indoor air quality (IAQ). Keeping the IAQ at a safe level will help to minimize any adverse health effects caused by air quality factors.
The 62.1 standard is intended for both new building and building addition projects. It can also be used as a guide for the improvement of IAQ in existing buildings.
Most local regulations for indoor air quality are designed around ASHRAE Standard 62. This standard specifies the minimum amount of outdoor air flow into an occupied space to be between 15 to 60 CFM per person, but more commonly building regulations require 15 to 20 CFM per person. Besides actually measuring the air flow, ASHRAE also defines indoor air quality using the concentration of carbon dioxide gas in the air. Carbon dioxide is recommended to be less than 1000 PPM. When sizing the air handling unit for a building, engineers will make the design exceed the maximum occupancy in the building or space to ensure that they will always be able to meet the minimum air requirements. In most cases, buildings or mix used spaces rarely are occupied at these maximum levels, thus the amount of conditioned air supplied is usually much greater than what is required. As building owners aim to reduce energy costs and operate buildings more efficiently, wasted energy of conditioning unneeded outside air has been a good place to start. Continue reading “Energy Savings from On-Demand Ventilation”
The current COVID-19 pandemic spread and breadth is unprecedented. Because of this, it is important that precautions are taken when reopening schools and office buildings. The question we find ourselves asking as professionals in the HVAC trade is this:
Proper selection and use of relative humidity (RH) sensors are important factors in designing and building a reliable, economical HVAC system. Over the years humidity control has been getting even greater attention because of its positive impact on indoor air quality (IAQ).
The importance of humidity measurement and control can mean different things depending on the application. To the museum curator, it means preserving valuable artwork and artifacts. To the hospital facilities engineer, it means a comfortable environment for the patients, as well as maintaining accurate moisture control to prevent the spread of bacteria and infection. And to the building maintenance professional, it means a reliable building automation system that reduces energy costs while increasing the comfort of its occupants.Continue reading “What to Consider When Selecting a Humidity Transmitter”