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Articles & Insights
Ventilation Strategies: Chilled Water Fan Powered Terminal Units
The most advanced system for delivering, controlling, and optimizing ventilation air utilizes…
Ventilation Strategies: Chilled Beams vs. Chilled Water Fan Powered Terminal Units
A large portion of the energy exerted by an HVAC system comes from conditioning the outside air…
Ventilation Strategies: Controlling Fresh Air
The first goal when designing an HVAC system is occupant comfort. Comfort includes considering…
VAV Systems: How Air Flows Through the Equipment
The purpose of using a Variable Air Volume (VAV) system is to add controllability to a diversity of…
HVAC Ins & Outs with Dan Int-Hout - Area Factors and Free Area
Every so often, we get a request for the Ak, or area factors, or for the “Free Area” for our air…
VAV Control: Terminal Unit Sequence Affects the Entire HVAC System
Developing real estate requires millions of decisions about what the building will look like, how…
HVAC Ins & Outs with Dan Int-Hout - What is wrong with ADPI?
The Air Diffusion Performance Index (ADPI) was developed at Kansas State University in the 1960’s…
VAV Systems: Ground Control to Major Tom
Choosing the right equipment for your VAV system is critical, but it is only part of creating the…
HVAC Ins & Outs with Dan Int-Hout - Measuring Air Speeds
The 1962 Air Diffusion Council Test Code 1062 required that room airspeed measurements be taken…
VAV System Design: What is your style?
The Houston, Seattle, and Washington DC markets largely specify systems that utilize series fan-…
VAV Diffusers: The solution to some issues but the cause of others?
Over-cooling in the summer or over-heating in the winter can impact occupant comfort. There are…
VAV Equipment Selection: Fan Powered Terminal Units
In many VAV systems, the exterior zones will utilize fan-powered terminal units. When compared to a…