A coated article including a coating supported by a glass substrate , the coating comprising moving away from the glass substrate : a dielectric layer comprising zirconium silicon oxynitride ; a first layer comprising zinc stannate ; a first layer comprising zinc oxide located over and directly contacting the layer comprising zinc stannate ; a first infrared (IR) reflecting layer comprising silver located on the substrate over and directly contacting the first layer comprising zinc oxide ; and a contact layer comprising metal oxide located over and directly contacting the first IR reflecting layer comprising silver ; a second layer comprising zinc stannate on the glass substrate over at least the first IR reflecting layer and the contact layer ; a second layer comprising zinc oxide located over at least the second layer comprising zinc stannate ; a second IR reflecting layer comprising silver located over at least the first IR reflecting layer , the first and second layers comprising zinc stannate , and the first and second layers comprising zinc oxide ; another dielectric layer over at least the second IR reflecting layer comprising silver ; wherein the coating contains two silver based IR reflecting layers ; wherein the second IR reflecting layer comprising silver is at least 1,0 nm (10 angstroms) thicker than the first IR reflecting layer comprising silver ; wherein the dielectric layer comprising zirconium silicon oxynitride is at least 1,0 nm (10 angstroms) thicker than the first layer comprising zinc stannate ; and wherein the second layer comprising zinc stannate is at least 2,0 nm (20 angstroms) thicker than the dielectric layer comprising zirconium silicon oxynitride . a dielectric layer comprising zirconium silicon oxynitride ; a first layer comprising zinc stannate ; a first layer comprising zinc oxide located over and directly contacting the layer comprising zinc stannate ; a first infrared (IR) reflecting layer comprising silver located on the substrate over and directly contacting the first layer comprising zinc oxide ; and a contact layer comprising metal oxide located over and directly contacting the first IR reflecting layer comprising silver ; a second layer comprising zinc stannate on the glass substrate over at least the first IR reflecting layer and the contact layer ; a second layer comprising zinc oxide located over at least the second layer comprising zinc stannate ; a second IR reflecting layer comprising silver located over at least the first IR reflecting layer , the first and second layers comprising zinc stannate , and the first and second layers comprising zinc oxide ; another dielectric layer over at least the second IR reflecting layer comprising silver ; wherein the coating contains two silver based IR reflecting layers ; wherein the second IR reflecting layer comprising silver is at least 1,0 nm (10 angstroms) thicker than the first IR reflecting layer comprising silver ; wherein the dielectric layer comprising zirconium silicon oxynitride is at least 1,0 nm (10 angstroms) thicker than the first layer comprising zinc stannate ; and wherein the second layer comprising zinc stannate is at least 2,0 nm (20 angstroms) thicker than the dielectric layer comprising zirconium silicon oxynitride . <EOS>