The Science of ComfortTM
Airborne infectious isolation rooms (AIIRs) are used for patients with easily communicable airborne diseases. When there is a shortage of AIIRs, existing patient rooms (or hotel rooms in temporary care facilities) can be converted to negative pressure isolation rooms. Price Fan Filter Units (FFUs) can be used in three configurations to retrofit these existing spaces.
Topics: HVAC, Engineering, Design Engineering, Training, Tech Tip, Catalog, Engineering Update, Critical Environments, Filtration
Designing a ventilation system for a swimming pool can be tricky. For occupant comfort, these facilities require 40 to 60% relative humidity to be maintained year round. For swimmers, a humidity range of 50 to 60% is most comfortable. However, humidity levels below 50% can significantly increase energy consumption, while humidity levels above 60% can cause damage due to mold, mildew and condensation.
Topics: GRD, Grilles, Thermal Comfort, HVAC Fundamentals, HVAC, Engineering, Design Engineering, Training, Tech Tip, Handbook, ASHRAE 62, Engineering Update
All diffusers become noisier with higher pressures at their inlet and this is true for VAV diffusers. Pressure is often reduced by the use of a balancing damper or terminal unit, but VAV diffusers are unique as they have a built in VAV damper that can close down to a minimum flow.
Topics: Diffusers, Pressure Drop, HVAC Fundamentals, HVAC, Design Engineering, Tech Tip
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