Ductwork Design and Sizing w/John Stischok

We speak to John Stischok from Armstrong Fluid Technology about ductwork design and sizing. www.cintas.com/HVACKnowItAll. Check out Wizehire.com Check out https://chiirp.com/ Save 8% on your purchase https://www.trutechtools.com/ with promo code knowitall Check out the HVAC Know It All app app.hvacknowitall.com https://www.hvacknowitall.com/pages/about Visit HVAC Know It All on social media Facebook https://www.facebook.com/hvacknowitall/ Instagram https://www.instagram.com/hvacknowitall1/