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An insulating unitless window sash includes a sash frame made of four linear sash members having their mitered edges joined together. Each of the sash members in cross section includes a peripheral surface, a first and outer side walls and a first groove spaced from a second groove. Each of the groo

An insulating unitless window sash includes a sash frame made of four linear sash members having their mitered edges joined together. Each of the sash members in cross section includes a peripheral surface, a first and outer side walls and a first groove spaced from a second groove. Each of the grooves has a base and spaced walls. The base of the first groove is spaced a greater distance from the peripheral surface than the base of the second groove. Peripheral and marginal edges of a first sheet are in the first groove and peripheral and marginal edges of a second sheet are in the second groove. A shim is mounted on the sash frame adjacent the outer surface of the first sheet to give a balance configuration.

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1. An insulating glazing window sash comprising:a sash frame made of at least two sash sections having their ends in contact with one another, each of the sash sections have a monolithic cross section, the cross section defined by a peripheral surface, opposed outer side surfaces defined as a first

1. An insulating glazing window sash comprising:a sash frame made of at least two sash sections having their ends in contact with one another, each of the sash sections have a monolithic cross section, the cross section defined by a peripheral surface, opposed outer side surfaces defined as a first outer side surface and a second outer side surface and two grooves defined as a first groove and a second groove, the grooves spaced from one another and extending between and along the opposed outer side surfaces, each of the grooves has a base and spaced walls extending from the base in a direction away from the peripheral surface of the sash frame defined as a first direction, the base of the first groove spaced a distance from the peripheral surface different than the base of the second groove and the first groove adjacent and spaced from the first outer side surface and the second groove adjacent and spaced from the second outer side surface wherein the distance between the spaced walls of the first groove decrease as the distance from the base of the first groove in the first direction increases; a first sheet having marginal and peripheral edges in the first groove of the sash sections, and a second sheet having marginal and peripheral edges in the second groove of the sash sections. 2. The window sash of claim 1 wherein the distance between the spaced walls of the second groove decrease as the distance from the base of the second groove in the first direction increases.3. The window of claim 1 wherein the sash frame is made of plastic.4. The window sash of claim 1 further including muntin bars between the first and second sheets.5. The window sash of claim 11 further including a third groove between the first and second grooves, the third groove having a base and walls extending away from the peripheral surface of the sash frame, the base of the third groove spaced from the peripheral surface a distance different than the distance of the first and second grooves from the peripheral surface of the sash frame.6. An insulating glazing window sash comprising:a sash frame made of wood and of at least two sash sections having their ends in contact with one another, each of the sash sections have a monolithic cross section, the cross section defined by a peripheral surface, opposed outer side surfaces defined as a first outer side surface and a second outer side surface and two grooves defined as a first groove and a second groove, the grooves spaced from one another and extending between and along the opposed outer side surfaces, each of the grooves has a base and spaced walls extending from the base in a direction away from the peripheral surface of the sash frame defined as a first direction, the base of the first groove spaced a distance from the peripheral surface different than the base of the second groove and the first groove adjacent and spaced from the first outer side surface and the second groove adjacent and spaced from the second outer side surface; a first sheet having marginal and peripheral edges in the first groove of the sash sections, and a second sheet having marginal and peripheral edges in the second groove of the sash sections. 7. The window sash of claim 6 wherein the sheets are tempered.8. The window sash of claim 6 further including a moisture impervious sealant in each of the grooves.9. The window sash of claim 6 wherein the sash frame has a parallelepiped shape and each of the sash sections have mitered ends and further including means to secure the mitered ends together.10. The window sash of claim 6 wherein the distance between the base of the first groove and the peripheral surface is greater than the distance between the base of the second groove and the peripheral surface and the length of the first outer wall measured from the base in the first direction is greater than the length of the second outer wall as measured from the base in the first direction and further including a shim on each sash section against outer surface of the second sheet in the second groove to balance the configuration of the unit.11. The window sash of claim 10 further including muntin bars between the first and second sheets.12. The window sash of claim 6 wherein at least one outer surface of one of the sheets has a photocatalytic coating.13. The window sash of claim 12 further including a third groove between the first and second grooves, the third groove having a base and walls extending away from the peripheral surface of the sash frame, the base of the third groove spaced from the peripheral surface a distance different than the distance of the first and second grooves from the peripheral surface of the sash frame.14. The window sash of claim 6 wherein a compartment is between the sheets and at least one of the surfaces of at least one of the sheets facing the compartment has a water reducing film.15. The window sash of claim 14 further including a third groove between the first and second grooves, the third groove having a base and walls extending away from the peripheral surface of the sash frame, the base of the third groove spaced from the peripheral surface a distance different than the distance of the first and second grooves from the peripheral surface of the sash frame.16. The window sash of claim 6 further including a third groove between the first and second grooves, the third groove having a base and walls extending away from the peripheral surface of the sash frame, the base of the third groove spaced from the peripheral surface a distance different than the distance of the first and second grooves from the peripheral surface of the sash frame.17. An insulating glazing window sash comprising:a sash frame made of at least two sash sections having their ends in contact with one another wherein each end of each sash section is mitered and has a recess, each of the sash sections have a monolithic cross section, the cross section defined by a peripheral surface, opposed outer side surfaces defined as a first outer side surface and a second outer side surface and two grooves defined as a first groove and a second groove, the grooves spaced from one another and extending between and along the opposed outer side surfaces, each of the grooves has a base and spaced walls extending from the base in a direction away from the peripheral surface of the sash frame defined as a first direction, the base of the first groove spaced a distance from the peripheral surface different than the base of the second groove and the first groove adjacent and spaced from the first outer side surface and the second groove adjacent and spaced from the second outer side surface; a moisture impervious sealant in the recess of the sash sections; a first sheet having marginal and peripheral edges in the first groove of the sash sections, and a second sheet having marginal and peripheral edges in the second groove of the sash sections. 18. The window sash of claim 17 further including a third groove between the first and second grooves, the third groove having a base and walls extending away from the peripheral surface of the sash frame, the base of the third groove spaced from the peripheral surface a distance different than the distance of the first and second grooves from the peripheral surface of the sash frame.19. An insulating glazing window sash comprising:a sash frame made of at least two sash sections having their ends in contact with one another, each of the sash sections have a monolithic cross section, the cross section defined by a peripheral surface, opposed outer side surfaces defined as a first outer side surface and a second outer side surface and two grooves defined as a first groove and a second groove, the grooves spaced from one another and extending between and along the opposed outer side surfaces, each of the grooves has a base and spaced walls extending from the base in a direction away from the peripheral surface of the sash frame defined as a first direction, the base of the first groove spaced a distance from the peripheral surface different than the base of the second groove and the first groove adjacent and spaced from the first outer side surface and the second groove adjacent and spaced from the second outer side surface wherein the distance between the base of the first groove and the peripheral surface is greater than the distance between the base of the second groove and the peripheral surface and the length of the first outer wall measured from the base in the first direction is greater than the length of the second outer wall as measured from the base in the first direction; a first sheet having marginal and peripheral edges in the first groove, a second sheet having marginal and peripheral edges in the second groove, and a shim on each of the at least two sash sections adjacent outer surface of the second sheet in the second groove to balance the configuration of the window sash. 20. The window sash of claim 19 further including a third groove between the first and second grooves, the third groove having a base and walls extending away from the peripheral surface of the sash frame, the base of the third groove spaced from the peripheral surface a distance different than the distance of the first and second grooves from the peripheral surface of the sash frame.21. An insulating glazing window sash comprising a sash frame made of at least two sash sections having their ends in contact with one another, each of the sash sections have a monolithic cross section, the cross section defined as a peripheral surface, opposed outer side surfaces defined as a first outer side surface and a second outer side surface and two grooves defined as a first groove and a second groove, the grooves spaced from one another and extending between and along the opposed outer side surfaces, each of the grooves has a base and spaced walls extending from the base in a direction away from the peripheral surface of the sash frame defined as a first direction, the base of the first groove spaced a distance from the peripheral surface different than the base of the second groove and the first groove adjacent and spaced from the first outer side surface and the second groove adjacent and spaced from the second outer side surface;a first glass sheet having marginal and peripheral edges in the first groove of the sash sections, and a second glass sheet having marginal and peripheral edges in the second groove of the sash sections wherein peripheral edges of the sheets are rounded. 22. The window sash of claim 21 further including a third groove between the first and second grooves, the third groove having a base and walls extending away from the peripheral surface of the sash frame, the base of the third groove spaced from the peripheral surface a distance different than the distance of the first and second grooves from the peripheral surface of the sash frame.