It is important to have your HVAC tech or designer actually measure air flow and measure static pressure in the duct system to be sure that the system is operating properly and without excessive static pressure and without improper balance between zones. For example, if you are trying to swit...
Building a DIY dust collector doesn’t just improve the air quality in your workshop; it’s also an excellent opportunity to get creative with upcycling. Repurposing materials not only makes your project more eco-friendly but can also add a unique touch and save money. Here are some clever ...
If anything is unclear here, you can pose the question in the comments and we’ll help you out. Duct Diameter CFM Chart For everybody who needsCFM calculation for ductwork, you will also need the duct diameter to achieve that airflow. ...
Additional ductwork elbows help reduce the sound levels by reflecting the sound wave. An engineer must balance sound performance with the pressure drop and fan performance with the type of ductwork elbows used. A smooth radius elbow will have different attenuation levels than a mitered elbow with t...
The only tricky part is that in 2023, the HVAC industry switched over to SEER2 to measure cooling efficiency, and HSPF2 for heating efficiency. These new specs are supposed to represent the real-world energy use more accurately, which is a good thing. A good-enough rough calculation is...
The photo above shows how to make the measurement of pressure drop. You need a hole in the return ductwork on each side of the filter. In this case I used two static pressure probes, one inserted in each hole. Each probe has a piece of hose connecting the probes to the input and ref...