And here lies the problem, which is why I recommend at present, no equivalent products Solac: Just try to get a replacement HEPA filter for it ... at least I search in vain for months and have also to a mail request to the company so far received no response.
Conclusion: First, make possible delivery of spare parts and if necessary choose another company that also sells spare parts.
If I still get new information or the replacement filter, do I sign up again ...