The agency's first task will be to develop a direct mail recruitment campaign based on the Asthma UK strap-line, 'Control over asthma today, freedom from asthma tomorrow'.
Claydon Heeley was handed the account following a competitive pitch handled by the AAR. Agencies with tobacco clients were not invited to take part.
Asthma UK wants to raise awareness of its role as an expert on the condition and challenge the common perception that it is solely a campaigning organisation.
The charity's account was previously managed by Whitewater.