Ruler of the Universe

[RubeRad]

A buddy just called me asking if I could help him find a conversion from BTU to CFM. An archived thread here asking for just that received a reply of "not possible", which I told my buddy.

A minute later, he called me back that, armed with some more specific information, he had found out that you can convert from BTU/h to CFH by dividing the BTU/h by 1100. And then from CFH to CFM is a further division by 60.

[Robert Fogt]

It would depend on the substance, its temperature, its pressure, the humidity, and the circumstances of your conversion.

Converting CFM of propane will have a different conversion factor than converting CFM of petroleum. Also, the density of liquids and gasses change with temperature and pressure, also the density of gasses change with humidity and often differ based on the source.

I would be careful converting that using some value you find that doesn't take into account all that information, at the very least it should take into account the substance.

[Unregistered]

so how can you convert that

[Robert Fogt]

What is the substance?

Propane, natural gas, automotive gas, petroleum? All would be different.

[Unregistered]

Actually (chemical engineer here) a CFH of natural gas is divided by 1000, while a CFH of propane is divided by 2500. The substance makes a huge difference.