This damper is part of a free cooling system for a rooftop economizer. It is part of an economizer damper system which allows free outside air cooling when the outside air temperature and humidity are ideal. This economizer also works on CO2 control so that if the CO2 levels inside the space rise above a CO2 set point the economizer damper opens allowing fresh outside air into the space while venting the air laden with CO2 to the outside. Continue reading “HVAC Rooftop Economizer – CO2 Control” »
As the cost of energy rises engineers are looking for ways to improve and increase energy efficiency. Aside from HVAC equipment with higher energy efficiency rates, improving structures for less heat loss and heat gain, and building automation systems giving the equipment precision control for better efficiency of the equipment, there are other ways to increase energy efficiency inside buildings. One of the ways to increase energy efficiency inside buildings is to add energy recovery wheels to the economizer systems. A US Department of Energy study concluded energy recovery wheels can save over 15% of the energy used in commercial HVAC applications.
Indoor air quality is very important to our health. There are not many people who worry about indoor air quality unless they suffer from asthma or another respiratory problem that can easily be aggravated by indoor pollutants or bad indoor air quality. If we examine the things in our air we are surprised of the things in the air which can have dramatic affect on our health. People who suffer from respiratory health problems usually see increased health when they institute a good indoor air quality program that can include installing electronic air cleaners and ultra-violet air cleaners along with a good air filtration system. Continue reading “HVAC Indoor Air Quality and Pollution” »