Heat Recovery system in HVAC & its working principle

Sound Attenuator Types & Selection criteria

Duct Area Calculation formula - (Rectangular, Round & Oval)

Types of HVAC ducts: 1. Rectangular Duct                                  2. Round Duct. 3. Oval Duct. Area of Rectangular Duct = 2(W+H)*L W - Widt…

Duct Sizing Method

DUCT SIZING : The most widely used method to size ducting is the equal friction method.  The other methods are velocity reduction and static regai…

Duct Classification

DUCT CLASSIFICATION Ducts are classified in terms of velocity and pressure. Velocity Classification Ducts are classified into 3 basic categories: 1. …

External Static Pressure

What is External Static Pressure in HVAC Ducts? External Static Pressure is basically and simply the pressure required by a fan (which is located i…