This year, it is doubling its efforts in a bid to raise money for itself as well.
Conductor Eleanor Moyle said it was the choir's 75th anniversary this year, and as part of its celebrations, it would give a special performance at the Red Cross annual meeting in Wellington on October 28.
The choir's 30 members continue to sing at rest-homes around the city, volunteer on Red Cross days, and help at the blood bank.
But in recent months, it has ramped up its own fundraising with bring-and-buy sales, cake sales, and pie and savoury sales to pay for flights to Wellington and accommodation there.
Mrs Moyle said the choir's Glenroy Auditorium anniversary concert on October 14 would raise money for the trip too.
The only other two Red Cross choirs in the world are in Botswana and Canada.
''We're not sure of the exact date the choir was formed,'' Mrs Moyle said, but it was sometime in 1941, during World War 2. It gave its first concert in 1942 at the then Concert Chamber (now the Glenroy Auditorium), ''and that's why we are going to be having our 75th anniversary concert there.''
''It was called the Voluntary Aid Detachment Choir and the ladies would go around and sing at Montecillo and places like that, to the soldiers who had come back after being wounded.''
It would be an important milestone for the choir because its members were aged 24 to 80, and many would not be around to celebrate its centenary.
