STRAIGHT ANSWERS
Frequently asked questions
Everything you need to know about learning practical air-filter skills with Directlio GreenAir.
Who are these courses for?
Designed for homeowners, caregivers, learners, and small-workplace coordinators who want actionable, routine knowledge for maintaining healthy indoor air.
Do the courses replace a technician?
No. All material covers routine education only and clearly identifies moments when you should follow manufacturer instructions or consult qualified professionals.
How do I know which filter size to buy?
Our selection courses teach you to read equipment manuals, record nominal dimensions, and double-check against the actual housing space before purchasing.
What does MERV mean?
MERV is a recognized rating system that describes particle-filtration performance under standardized test conditions. Lessons explain why context on each label remains essential.
Can I save courses?
Yes. Use the favorite control on any Catalog card. Saved course IDs persist in your browser and are available anytime on the Fallows page.
How does the cart work?
The cart stores course IDs and chosen quantities locally in your browser for this interactive demonstration and does not process payments.
Are there images in the lessons?
The site follows a photo-free organic system. Course cards communicate clearly through typography, color hierarchy, and structured details only.
Can workplaces use the material?
Small-workplace and property-care courses support team documentation and daily communication while leaving all site-specific decisions with responsible facility staff.
How can I ask about accessibility?
Use the contact form and describe the format or reading support required. The team responds promptly with appropriate guidance.