Sales of air conditioning units are set to rise by between 10 and 15 percent this year, Tomas Garrido, the President of the Majorcan Household Goods Retailers' Association claimed yesterday. Customers are expected to opt for medium to high quality products which function noiselessly. Garrido said that by way of contrast, few people have taken up an offer of a 80 to 100 euro discount on the cost of air conditioning unit renovation because of the excessive paperwork.