Hvac Ductwork Hvac Duct Design Example

Rectangular ells tees and reducers rectangular side take offs and vertical ells multiple fittings in a duct system basic how to ductwork installation.

Hvac ductwork hvac duct design example. Below is a simple model for determining duct sizes. 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. Flexible duct work must be stretched tightly for maximum air flow. The model applies to system up to 60 feet from unit to register.

This includes materials selection noise duct sealing leakage and delivering energy efficient ductwork solutions. For example if the gauge reads 10 psig then using the above equation the absolute pressure would be 24. 10 psig 14 7 psi 24 7 psia. Always stagger take off ducts by 12 to maintain pressure.

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. 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. Includes a full worked example as well as usin. Ductwork is simply an air delivery system.

2 all models must have a mechanical plan showing furnace size and location along with duct size and location. A delivery system for all forced air systems furnace or air handler heating or air conditioning or both. In this video we ll be learning how to size and design a ductwork for efficiency. This includes types of fittings used.

Leave hvac beginners ductwork and return to duct design main page leave hvac beginners ductwork and return. 1 psi equals 27 7 inches of water gauge. Use insulated duct or duct board in unheated spaces. Manual j s and d calculations are required for each model.

This course is designed to familiarise you with the design selection and application of ductwork systems in hvac applications. Because of the complexity of designing duct systems we highly recommend using the acca manual d for sizing ductwork or consulting a professional hvac contractor. How to design a duct system. This hvac for beginners section begins here with a discussion about forced air duct systems the basics the how and why of duct sizing.

System is designed to move 3 ton of a c or 1200 cfm. Residential hvac design testing requirements. Include any options that modify the mechanical layout. Residential hvac duct drawings by geoffrey r.

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.