Alen 45i is the perfect size for our large bedrooms. We have two 45i air purifiers. They clean the dust and dander from her home. No more asthma symptoms! I love the style, quietness, air quality sensor, color choices, automatic setting, adjustable light on the panel and how well it keeps my bedroom’s air clean. Lifetime warranty and made in the USA. Excellent customer service. Thank you Alen! Highly recommended!