### RE: BTU math

Hello all,

I seem to remember a formula for calculating heat transfer time. Does anyone know it?

As in..it will 3 BTUS to raise 1 pound of water 3 degrees Fahrenheit, but how long will this take?

thanks!

Hello Andrew! Oh, for sure no time in the book definition of BTU. Something along the line of.. if someone was selling me a pool heater with a known BTU value, and if I know the size of my pool, there should be a way for the salesman to answer if I ask “ how long with this take to raise the temperature of my pool from 50 degrees to 70 degrees