He married Mary Jane Tandy (c. 1863 – 6 January 1919) on 25 December 1883 at the North Harborne Parish Church in England.
[1][2] The Duffells arrived in Western Australia in 1905, where he founded a firm of cork importers and vinegar manufacturers.
[1] In November 1906, Duffell was elected to the Subiaco Municipal Council.
At the 1926 Western Australian Legislative Council election, Duffell was voted out.
[1][2] Duffell died on 28 February 1936 at St John of God Subiaco Hospital.