A 5-month-old infant presents to a rural emergency department in northern Canada with 3 days of cough, rhinorrhoea and increasing work of breathing. Examination reveals tachypnoea, subcostal indrawing and diffuse crackles and wheeze. Oxygen saturation is 92% on room air and he is feeding adequately. According to Canadian Paediatric Society bronchiolitis recommendations, what is the most appropriate management?