Hvac Ductwork Hvac Duct Design Example

1 psi equals 27 7 inches of water gauge.

Hvac ductwork hvac duct design example. Below is a simple model for determining duct sizes. How to design a duct system. Ordinary heating ventilating and air conditioning duct systems read air pressures at 0 4 psi or less often much less. Manual j s and d calculations are required for each model.

Ductwork is simply an air delivery system. Getting a complete manual d hvac design done on your property plans is the best way to ensure that your heating and cooling system will deliver maximum comfort at high efficiency a proper hvac duct sizing will guarantee that your. The model applies to system up to 60 feet from unit to register. This course is an individual unit in the professional certificate in hvac r fundamentals.

Use insulated duct or duct board in unheated spaces. Includes a full worked example as well as usin. Residential hvac design testing requirements. This includes materials selection noise duct sealing leakage and delivering energy efficient ductwork solutions.

This hvac for beginners section begins here with a discussion about forced air duct systems the basics the how and why of duct sizing. Always stagger take off ducts by 12 to maintain pressure. A delivery system for all forced air systems furnace or air handler heating or air conditioning or both. 2 all models must have a mechanical plan showing furnace size and location along with duct size and location.

I ll follow that up with articles on the process we use in designing duct systems including available static pressure equivalent length and choosing fittings. Refer to the links on the left for more information. This includes types of fittings used. Residential hvac duct drawings by geoffrey r.

Include any options that modify the mechanical layout. Leave hvac beginners ductwork and return to duct design main page leave hvac beginners ductwork and return. 10 psig 14 7 psi 24 7 psia. The manual d is a complete schematic drawing of the duct system including locations and sizes of trunk lines branch ducts outlet registers an inlet grilles.

System is designed to move 3 ton of a c or 1200 cfm. In this video we ll be learning how to size and design a ductwork for efficiency. Today i ll start with what you do in the hvac design process before you get to the duct design phase manual d as well as the physics of air flow when it s constrained by ducts. For example if the gauge reads 10 psig then using the above equation the absolute pressure would be 24.

Flexible duct work must be stretched tightly for maximum air flow.