Table 1.

Dwelling archetype descriptions and permeability estimated from the EHS and SAP

Archetype code	Dwelling archetype	Age bracket	Frequency in stock, %	Estimated permeability (m3/h/m2 at 50 Pa)
H01	Late Victorian/Edwardian Terrace (Large T)	1902–1913	15.4	17.2
H02	WW1 & WW2 Simple Terrace	1914–1945	14.5	14.9
H03	WW1 & WW2 Large Semidetached	1914–1945	8.8	16.1
H04	‘60s & ‘70s Tall Purpose-built Flats	1960–1979	5.7	16.2
H05	Late Victorian/Edwardian Simple Terrace	1902–1913	5.5	17.2
H06	Post-War Tall Purpose-built Flats	1946–1959	4.7	13.2
H07	Recent Tall Purpose-built Flats	1980–2008	3.6	9.2
H08	Late Victorian/Edwardian Simple Terrace (attic)	1902–1913	2.9	17.2
H09	WW1 & WW2 Bungalow	1914–1945	2.4	17.9
H10	‘60s & ‘70s Simple Terrace	1960–1979	2.4	12.3
H11	‘60s & ‘70s Line-built Walk-up Flats	1960–1979	2.3	9.8
H12	WW1 & WW2 Line-built Walk-up Flats	1914–1945	2.1	10.1
H13	Recent Terrace with Shop Below	1980–2008	2.1	12.2
H14	Post-War Step-Linked Terrace	1946–1959	1.9	13.4
H15	Post-War Line-built Walk-up Flats	1946–1959	1.8	11.6