Duct CFM Chart | Round & Flex Duct | Calculation Guide
Many people want to have a quick check on the duct size for a given CFM without going through complex calculations. Hence, I thought providing some duct CFM charts would…
How to Calculate Static Pressure in a Duct?
A fan must have enough external static pressure to deliver the required airflow in a duct system. Hence, the static pressure in the duct must be determined. So, how do…
PH Diagram for Refrigeration Cycle In-Depth Explanation
PH diagram for the refrigeration cycle is one of the essential elements in air conditioning. It is fundamental to how air conditioners work. However, it is not well understood by…
Bathroom Fan Sizing Guide: Code, CFM Chart & Calculation
Ventilation is essential in the bathroom. An adequately sized bathroom fan is critical to the air quality in the bathroom. So, how do you calculate the CFM of a bathroom…
How to Calculate Chilled Water Pump Head?
Pump head is an essential parameter for chilled water pumps as well as condenser water pumps. It determines if the pumps are able to deliver the required water flow rate….
HVAC Value Engineering Ideas (10 Tips)
Value engineering is not uncommon in HVAC. Engineers conduct value engineering exercises to save the initial cost of a new HVAC system. Although some people use value engineering as a…
