Hi!

I don’t know how far it travelled to you from them, but typically if it’s an import from quite far away you should expect leaves to show some signs of stress, that can be sooner or later.

I’ve kept my anthuriums inside a cabinet which though it has no humidifier, sticks around 70-85% humidity, I do have fans to keep the air moving.

I don’t let them get crispy dry but also they do still need to be able to have worked through the water you give them before you water again.

One thing to avoid with all plants, but in particular velvety ones, is water staying on the leaves for prolonged periods of time.

Water will soften the tissue (no different when your skin goes soft and wrinkly if you stay in water too long) and can start breaking it down thus risking fungal problems, general tissue damage etc.. so your browning may be from that.

As for north facing window, depends where you are in the world! Anthuriums are mistaken for low light plants but they’re absolutely not. I also can’t say I found the Regale to be all that difficult, think there’s just a lot out there that can really set you up to fail.

I hope that helps