A vacuum insulating glazing unit extending along a plane, P, defined by a longitudinal axis, X, and a vertical axis, Z; having a width, W, measured along the longitudinal axis, X, and a length, L, measured along the vertical axis, Z, and comprising: a. a first glass pane having a thickness Z1, and a second glass pane having a thickness, Z2, wherein the thicknesses are measured in the direction normal to the pane, P, wherein Z1 is greater than Z2 (Z1>Z2), wherein the first glass pane and the second glass pane are float annealed glass panes; and wherein the first glass pane has a coefficient of thermal expansion, CTE1, and the second glass pane has a coefficient of thermal expansion, CTE2, and wherein the absolute difference between CTE1 and CTE2 is at most 0.40 10 -6 /°C (|CTE1-CTE2 | ≤0.40 10 -6 /°C); b. a set of discrete spacers positioned between the first and second glass panes, maintaining a distance between the first and the second glass panes and forming an array having a pitch, λ; c. a hermetically bonding seal sealing the distance between the first and second glass panes over a perimeter thereof; d. an internal volume, V, defined by the first and second glass panes and the set of discrete spacers and closed by the hermetically bonding seal and wherein there is a vacuum of absolute pressure of less than 0.1 mbar, characterized in that the length of the vacuum insulating glazing unit, L, is equal to or greater than 300 mm, (L ≥ 300 mm); in that, the thickness of the second glass pane, Z2, is equal to or greater than 3 mm, (Z2 ≥ 3 mm); in that, a thickness ratio, Z1/Z2, of the thickness of the first glass pane, Z1, to the thickness of the second glass pane, Z2, is equal to or greater than 1.30 (Z1 / Z2 ≥ 1.30), and greater than Z1 / (Z1- 2.10) (Z1/Z2 > Z1 / (Z1- 2.10)), and in that the pitch, λ, is comprised between 10 mm and 26 mm (10 mm ≤ λ ≤ 26 mm). a. a first glass pane having a thickness Z1, and a second glass pane having a thickness, Z2, wherein the thicknesses are measured in the direction normal to the pane, P, wherein Z1 is greater than Z2 (Z1>Z2), wherein the first glass pane and the second glass pane are float annealed glass panes; and wherein the first glass pane has a coefficient of thermal expansion, CTE1, and the second glass pane has a coefficient of thermal expansion, CTE2, and wherein the absolute difference between CTE1 and CTE2 is at most 0.40 10 -6 /°C (|CTE1-CTE2 | ≤0.40 10 -6 /°C); b. a set of discrete spacers positioned between the first and second glass panes, maintaining a distance between the first and the second glass panes and forming an array having a pitch, λ; c. a hermetically bonding seal sealing the distance between the first and second glass panes over a perimeter thereof; d. an internal volume, V, defined by the first and second glass panes and the set of discrete spacers and closed by the hermetically bonding seal and wherein there is a vacuum of absolute pressure of less than 0.1 mbar, characterized in that the length of the vacuum insulating glazing unit, L, is equal to or greater than 300 mm, (L ≥ 300 mm); in that, the thickness of the second glass pane, Z2, is equal to or greater than 3 mm, (Z2 ≥ 3 mm); in that, a thickness ratio, Z1/Z2, of the thickness of the first glass pane, Z1, to the thickness of the second glass pane, Z2, is equal to or greater than 1.30 (Z1 / Z2 ≥ 1.30), and greater than Z1 / (Z1- 2.10) (Z1/Z2 > Z1 / (Z1- 2.10)), and in that the pitch, λ, is comprised between 10 mm and 26 mm (10 mm ≤ λ ≤ 26 mm).