Ltpgtthe new xpelair premier range with ultradc technology are made to be safe energy efficient and long lasting the premier is designed with installer selectable settings for continuous ventilation in bathrooms and sanitary accommodations the ultradc offers upto 80 reduction in energy use and has a choice of installed performancesltpgt ltpgtthe premier ultra dc3 has been specially designed for through the wall and ducted applications it is also suitable for internal bathrooms