Volumetric air flow is measured in cubic feet per minute, but because the density of air and other gases changes with temperature and pressure, this number varies. Density varies directly with pressure and inve
This comes quite useful when you are trying to figure out which HVAC units to buy. Here is an example ofhow to select the best ceiling fansbased on CFMs. To demonstrate how to use the CFM calculator to calculate fan airflow, we’ll start by using the calculator. Here are the results:...
Now, this 6,000 cubic feet of airflow has to change all the room in the bathroom 8 times. That means we need to figure out how much air is in your bathroom. We can do that by calculating the volume of air in the bathroom. For this, we will need to know 2 factors, namely: Bat...
Parts of the Compressor Map: The compressor map is a graph that describes a particular compressor’s performance characteristics, including efficiency, mass flow range, boost pressure capability, and turbo speed. Shown here is a figure that identifies aspects of a typical compressor map.Learn more ...
As you can quickly figure out, the more water lift a vacuum generates, the better it will clean. 4. Horsepower Unfortunately, in vacuum cleaners, this rating has no bearing upon a vacuum cleaner’s cleaning capabilities. In comparison to cars, in vacuums, horsepower is more of a marketing...
Hi, the problem I have to solve is to find the air flow in a segment of a pipe between two regulators of pressure where there is a 1" (length of about...
From there, you can determine if your current system is powerful enough to meet the airflow and air changes needs in your home. How many CFM do I need? Answer #1: 350 – 400 CFM per ton of HVAC capacity. That’s the answer to the question: What CFM do I need for my HVAC system...
That is, these people are looking for evidence of global warming in the statistics, instead of looking at the evidence objectively and trying to figure out what it means. Some argue any increase in global temperatures we are seeing could be a natural climate shift, or it could be due to ...
As depicted in Figure #2, Characteristic Curve 2 represents a fan with the same size and shape as Characteristic Curve 1, but operating at a lower speed. If the system demands 15 CFM at 0.05 Inch-H2O, the intersection of the static pressure and airflow curves s...
That is, these people are looking for evidence of global warming in the statistics, instead of looking at the evidence objectively and trying to figure out what it means. Some argue any increase in global temperatures we are seeing could be a natural climate shift, or it could be due to ...