HVAC-Air Terminals Sizing l ASHRAE 70 Requirements l Selection with all Technical Concepts🔥Explained

During the commissioning of HVAC system, we will face some difficulties as I mentioned below:- • My selection is based on Manufacturer Performance Data, But I could not get Proper throw as mentioned in the Performance data Sheet. • I get Higher Noise Level. However, my selection is based on Manufacturer Performance Data. • I am not sure I followed correct minimum and Maximum distance between Two diffusers? • I have a restaurant with Open Ceiling, I selected the diffuser based on performance data sheet, but no proper throw & cooling. It is important to understand how each technical parameters affect the selection instead of simply selecting the Numbers from some Manufacturers Technical Data Sheet, in this video I covered the Technical Points & its backup ideas how each factors affect the Diffusers Selection.  A couple of things affect the throw and drop of diffuser- one is whether its free jet or whether it is moving along the surface like ceiling.  If the Diffusers are designed and tested based on ASHRAE 70 for the installation in the ceiling & if we install the same diffusers in the open ceiling area, diffuser cannot produce its output as mentioned in its performance data of technical data sheet.  If diffusers are installed in the ceiling, it will have SURFACE EFFECT. That means the air will touch the ceiling first and momentum of jets carry the air further.  If the same diffuser is installed in a place without ceiling , there will be 30% reduction in throw. If the performance data of diffuser indicates 4m throw, then there will be 30% reduction in throw distance.  During the discharge of supply air through ceiling diffuser, due to high supply air velocity near the ceiling surface, a small low pressure zone is created along the ceiling and that pulls the air back towards the ceiling. This is called as COANDA EFFECT.  Throw is measured on some Terminal velocity like 150FPM (0.75 M/s), 100FPM (0.5 M/s) & 50FPM (0.25 M/s) Like mentioned above, many more technical points added for your clear understanding. For More HVAC Videos:- HVAC Design-Units Schedule all Technical Parameters with Backup Calculations l HVAC Units Selection=    • HVAC Design-Units Schedule all Technical P...   HVAC Manual Cooling Load Calculation with Practical Example, Design Ideas, Issues & Questions-Part 1=    • Part 1-HVAC Manual Cooling Load Calculatio...   HVAC Manual Cooling Load Calculation with Practical Example, Design Ideas & Issues Part 2=    • Part-2-HVAC Manual Cooling Load Calculatio...   HVAC Manual Cooling Load Calculation with Practical Example, Design Ideas & Issues Part 3=   • Part-3-HVAC Manual Cooling Load Calculatio...   HVAC Manual Cooling Load Calculation with Practical Example, Design Ideas & Issues Part 4=    • Part-4-HVAC Manual Cooling Load Calculatio...   HVAC Manual Cooling Load Calculation with Practical Example, Design Ideas & Issues Part-5=   • Part-5-HVAC Manual Cooling Load Calculatio...   HVAC Manual Cooling Load Calculation with Practical Example, Design Ideas & Issues Part 6 =   • Part-6-HVAC Manual Cooling Load Calculatio...   HVAC Manual Cooling Load Calculation with Practical Example, Design Ideas & Issues Part 7=    • Part-7-HVAC Manual Cooling Load Calculatio...   HVAC Interview Questions and Answers l HVAC Important Questions-Must watch before Interview-Part 1=    • HVAC Interview Questions and Answers l HVA...   Email for your Technical Doubts Discussion: [email protected] To Join in the online course- +919952785376 or +971543402687 Telegram: https://t.me/+SX6DWcKOgyYxNmI8 #hvacdesign #hvacinstallation #hvacsystem #hvac #hvacparts #hvacmaintenance #hvactraining #hvacsystems #hvacexperts #hvacschool #Linear slot diffuser #mep #Linear slot diffuser installation #Linear slot diffuser selection #HVAC Duct design #HVAC Duct sizing #Chilled water pipe sizing #Pipe sizing #pipeline #Supply grill sizing #Return grill sizing