- CalmZone Technologies Ltd(CZT) is a joint American/New Zealand company from Connecticut USA and Wellington New Zealand. Wellington, New Zealand does not have the same internationally recognised name as Chicago for the 'Windy City' but it certainly is near the top in terms of wind speed, as winds in the region rise to over 200kmh during some winter storms. Where Hurricanes, Cyclones, Tornadoes, ...homepages.paradise.net.nz/~tvr