The way they describe the active chamber management in their blog post is basically to say “the enclosure allows it to reach temps as high as 55C, but you can keep it enclosed and drop the temperature so you can print PLA and PETG”. There might be some insulation perhaps, but getting to 55C is not particularly hard on almost any printer. Uninsulated printers with enclosures that are reasonably tight will hit 55C no problem. Add some insulation and you can hit 70C pretty reasonably all without any chamber heating.
