Cost and energy savings will be achieved on new and retrofit installations as well as design-build custom projects. As a rule-of-thumb, the outside air can be reduced by up to 75% in non-healthcare applications, subject to building pressurization requirements. A typical school with 100,000 square feet will save over 125 tons in cooling and over $30,000 a year in energy savings!
Save Energy By Reducing Outside Air
Utilizing the ASHRAE 62 Indoor Air Quality Procedure, combined with Enhale air purification technology, outside air may be reduced by up to 75% in non-healthcare applications, subject to building pressure. The Indoor Air Quality Procedure (IAQP) allows air purification to be applied to clean the air within the building from the contaminants of concern, thus allowing the outside air to be reduced, since the outside air is no longer required to dilute the contaminants of concern. To assist engineers and designers with the IAQP, Enhale technology has developed our proprietary software that calculates the outside air based on both the Ventilation Rate Procedure and the Indoor Air Quality Procedure. Thousands of projects have been designed using Enhale (IAQ) software with outside air quantities reduced to as little as 2.5 CFM per person!
- The Tampa Bay Times Arena avoided over 700 tons in chiller capacity, reduced first costs by over $1 million and saves over $115,000 per year in energy.
- K-12 schools and higher education facilities will save $300,000 to $500,000 in first costs by reducing outside air. Average energy savings will be $0.20 to $0.45 per square foot per year. As a side benefit to the energy savings, attendance will be higher since the Enhale’s technology kills the pathogens that could make students sick.
In addition to the reduced outside air, DCV can be used with the IAQP. This combination will provide for the most energy efficient building possible while providing exceptional IAQ. Since the cooling/dehumidification equipment is downsized during design, part load conditions do not cause the same “hunting/cycling” that occurs when using the VRP.
Considering how polluted outside air can be, it makes complete sense ($cents$) to reduce outside air, recirculate the indoor air that’s already conditioned and simply purify the indoor air.
Frequently Asked Questions About Reducing Outside Air
1. Will the indoor levels of C02 be higher? Yes. When reducing outside air, C02 levels will be higher.
2. Are higher C02 levels harmful? No. When using the IAQP, C02 is only an indicator of occupancy, not the indoor air quality. As you can see from the chart below, when using the IAQP, as C02 levels increase, the other contaminants of concern (VOC’s) are controlled to a minimum steady state level due to Enhale’s cold plasma technology.
Save Energy By Cleaning up Cooling Coils
It has been well documented that cooling coils become clogged over time and bio-film grows on the coils. This growth creates an insulating layer between the fin surface area and the air stream which causes the chiller/compressors to work harder by providing more chilled water or higher refrigerant pressures to accomplish the same amount of work to achieve the desired leaving air temperature. In addition to the reduced thermal transfer, the added bio-film and debris will reduce the “free” passageways for the air to flow and the air pressure drop will increase and requiring the fan to work harder. As an example, by mounting Enhale’-IBAR on the air inlet side of a cooling coil as shown in the figure below, it will clean the coils up over a few weeks and restore the thermal transfer and pressure drop to their original factory levels.
Where does the dirt go, you may ask? As the ions kill the bio-film, they lose their grip on the coil surface. When the cooling coil starts to condense moisture (when the air dew point is above the cooling coil discharge dry bulb leaving air temperature), the bio-film will run off with the condensate and it all goes down the drain.