Is the boiler made of RVS?
No, it's not. The boiler in the Stratus No.2 is made of solid brass. The quality of a brass boiler is much higher than for instance boilers made of aluminum.
Is this product suitable for cotton and linen bed sheets?
It will definitely work, but for steaming home textiles I would recommend a hand steamer. When steaming with a hand steamer, you have much more range, so steaming large pieces of fabric will be easier.
How often do I need to descale a Cumulus No.3 or Stratus No.2? And how do I do?
We recommend that you descale your steamer every 20th refill of the tank. You can either use a universal descaler, we offer this in our webshop, or white, distilled vinegar. It's also great for other appliances like the coffeemaker etc.
See this video for how to descale [39 sek].
Or read this guide:
For white distilled vinegar: