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Category Archives: Ask Rick
Ask Rick: High Performance Fume Hoods | Are Pass Thru Fume Hoods considered High Performance Hoods?
Q. Are pass thru fume hoods considered ‘High Performance Hoods’? A. Pass Thru Fume Hoods are not high performance hoods. Under good conditions, with one sash open between 12” and 18”, the hoods can contain at lower velocities. But, … Continue reading
Posted in Ask Rick, Lab Design
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Ask Rick: What is adiabatic humidification?
Q. What is adiabatic humidification? A. There are two basic ways to introduce moisture into air: Isothermal Humidification - the water vapor is dispersed in the air after having been created by boiling water. Isothermal humidification requires an external source … Continue reading
Posted in Ask Rick, Humidification
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Ask Rick: Should I use a bypass damper on an Energy Recovery Wheel?
Q. Should I use a bypass damper on an Energy Recovery Wheel? A. We typically use a bypass damper around a energy recovery device for frost control and economizer. That is typical for Heat Pipes and plate exchangers. In the … Continue reading
Posted in Ask Rick, Energy Wheels
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Ask Rick: How much cross contamination occurs with an Energy Recovery Wheel?
Q. How much cross contamination occurs with the use of an Energy Recovery Wheel? Does exhaust air get mixed back into the supply air stream? A. Cross contamination refers to the amount of air that is leaked from one side … Continue reading
Posted in Ask Rick, Energy Wheels
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Ask Rick: Why aren’t direct drive fans used on more applications?
In Europe, 80% of commercial ventilation units sold today are equipped with direct drive fans. In The US, the industrial and heavy commercial fields have already recognized the benefits of direct drive fans. Reduction in maintenance has been the primary … Continue reading
Ask Rick: High Plume Dillution Fans | Is the motor out of the airstream?
Q. On the Strobic Air Tri-Stack Fan is the motor out of the exhaust airstream? A. Yes, the fan motor is outside of the exhaust airstream. This is true for Strobic Air and for all High Plume Dilution Fans (Laboratory … Continue reading
Posted in Ask Rick, High Plume Dilution Fans
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Ask Rick: Pumped Glycol Systems | Where are Konvekta Systems manufactured?
Q. I have read about Konvekta systems. They are a Swiss company. Do they manufacture any parts of their system in the US? A. Most components are made in the USA; in particular, the Hydronic Module and its components (pumps, motors, valves, … Continue reading
Posted in Ask Rick, Pumped Glycol Systems
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Ask Rick: When do you use a Desaturation Coil?
Q: In what applications do you recommend using a desat coil? A: In general, a desaturation coil (desat coil) will help in any application where the cooling coil is the last component in an air handling unit. The desat coil … Continue reading
Posted in Air Handling Units, Ask Rick
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Ask Rick: How does a freezestat work?
Q: How does a freezestat work? A: You should use a freezestat to protect your water coils from freezing. Rooftop units with water coils should always have freezestats, even if using a water/glycol mixture. Typically the heating coil would be … Continue reading
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Ask Rick: Energy Recovery Wheels | Wheel off for Economizer?
Q. Is it ok to turn an energy recovery wheel off for economizer purposes? A. No, we do not recommend that. If an energy recovery wheel is stopped it’s flutes can clog if filters are not maintained properly. The wheel … Continue reading
Posted in Ask Rick, Energy Recovery, Energy Wheels
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