4mm Low-E Toughened (TGH) / 6mm Krypton cavity / 4mm Activ Float
Request made-to-measure heritage double glazing combining 4mm Low-E Toughened (TGH) on the inside, a 6mm Krypton gas cavity and 4mm Activ Float as Panel 2. This separate 14mm nominal sealed-unit make-up is available to discuss with a specialist supplier.
Exploded Sealed Unit Architecture
Activ float glass in a heritage sealed unit
This 4mm Activ float second-pane option lets you request an Activ glass make-up alongside an inside Low-E pane for a heritage window project. Ask your supplier to identify the exact Activ product, coating orientation, cleaning guidance and compatibility with the proposed sealed unit.
For this 4mm Activ Float product, the selected 6mm cavity and Krypton gas give an indicative U-value baseline of 1.5 W/m²K. Panel 1 is 4mm Low-E Toughened (TGH); Panel 2 is 4mm Activ Float. The total nominal unit thickness is 14mm. Confirm your rebate depth, sightline, spacer colour and the declared thermal performance with the supplier before ordering.
Choosing 4mm Activ Float for heritage double glazing does not establish planning or conservation permission. Your supplier should confirm the exact product, and any required appearance match or project approval must be checked separately.