Hvac Ductwork Hvac Duct Design Example

1 psi equals 27 7 inches of water gauge.

Hvac ductwork hvac duct design example.

The model applies to system up to 60 feet from unit to register. Residential hvac design testing requirements. For example if the gauge reads 10 psig then using the above equation the absolute pressure would be 24. Manual j s and d calculations are required for each model.

Flexible duct work must be stretched tightly for maximum air flow. 2 all models must have a mechanical plan showing furnace size and location along with duct size and location. System is designed to move 3 ton of a c or 1200 cfm. Refer to the links on the left for more information.

10 psig 14 7 psi 24 7 psia. Below is a simple model for determining duct sizes. Ordinary heating ventilating and air conditioning duct systems read air pressures at 0 4 psi or less often much less. This course is an individual unit in the professional certificate in hvac r fundamentals.

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. 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. A delivery system for all forced air systems furnace or air handler heating or air conditioning or both. Includes a full worked example as well as usin.

This hvac for beginners section begins here with a discussion about forced air duct systems the basics the how and why of duct sizing. This includes materials selection noise duct sealing leakage and delivering energy efficient ductwork solutions. 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. Residential hvac duct drawings by geoffrey r.

Include any options that modify the mechanical layout. 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. Rectangular ells tees and reducers rectangular side take offs and vertical ells multiple fittings in a duct system basic how to ductwork installation. This includes types of fittings used.

Ductwork is simply an air delivery system. This course is designed to familiarise you with the design selection and application of ductwork systems in hvac applications. Always stagger take off ducts by 12 to maintain pressure. In this video we ll be learning how to size and design a ductwork for efficiency.

How to design a duct system.