Tunnel tent ventilation in calm weather (Hilleberg focus)

I have never used a Hilleberg that didn't generate copious amounts of condensation. Having said that, it is a nature of the beast, generally, when winter camping.

Have you considered a large TiPi style shelter with ultralight stove?:

http://store.seekoutside.com/tents/

http://store.seekoutside.com/titanium-wood-stoves/

Considerably more room, excellent poor weather performance, and the heat from the stove will get rid of any condensation via the top vent(s). Plus the combination weighs less than the Keron 3.

Kaitum user for years and hardly ever any issues
with consensation if properly vented.

Six days in a Jannu – that'll make or break a friendship, I imagine :-)

I was out in my Nammatj 2GT on a calm -5F night a few weeks ago. Simply setting up the tent on the deep snow base, my breath was crystalizing on the vestibule ceiling. I kept the vents wide open, and rolled down both inner and outer doors to about 1/4 coverage. I also used the footprint to cover the ground in the vestibule. In the morning I was very pleasantly surprised at how little condensation there was – less than when I first set it up.

From memory, my Kaitum 3 was even better at condensation management, with its dual doors. The slightest breeze would help keep air moving, but even without, it was fine. I didn't miss having a ceiling vent in it. Certainly having a 3P will give you more space for 2, and that'll reduce the chance of condensation build-up.

But if that roof vent is a must-have for you, then why not look at the Tarra? It seems to combine the best of the dome design (static load strength, roof vent) with the best of the tunnel design (interior space, nearly vertical doors on both ends), although the extra pole means it is heavier than the Keron 3.

Thanks for the replies.

Funny one should mention a tipi, as I'd been considering a HMG mid for a while (I know, different things…But similar). The idea of using a stove to drive out moisture is interesting, hadn't given any thought to a wood stove – I'll have a think about that. Chances are I'll stick with liquid hydrocarbons for winrer though, as often alpine landscapes are devoid of notable vegetation.

The Tarra sure looks nice, and has more venting options than a traditional tunnel, but that extra space of a 3 man would be great. If the Tarra wasn't so heavy for internal space I'd more strongly consider it.

There will be the time where for short stays we'll actually have three people inside.

Its sounding like the ventilation of HB tunnels is going to be plenty good enough for me.