Create Your Own 4-Unit Bundle Build your own clean-air package and enjoy savings when you bundle. With the 4-Unit Bundle, you can mix and match Austin Air purifiers to create the setup that fits your home or workplace. How it works Select the Bedroom Machine in your preferred color. Add 3 more Austin Air units of your choice. Your discount is applied automatically at checkout. Bundle savings Build a bundle and enjoy cost savings. The more you add, the more you save! This bundle is ideal for covering multiple rooms or providing complete protection in larger spaces. Not sure which units to choose? You can also explore our pre-selected bundles for expert-curated combinations that fit common needs.