Known: Heater intake is 1/8", output is 1/4", pressure drop is ~8.3 psig at 5 CFM flow. Minimum SCFM is 1. The blower would need to put out a minimum of 1 SCFM and be variable above that to a max of 5.3 CFM How do I determine what size blower I would need to overcome this pressure and obtain 5+ CFM flow? I cannot use compressed air. Any formulas (obviously a non-physics/engineering person here) that could help here would be appreciated. Any other places you could point me to would be appreciated as well. If you can help, please do.