My Dear Sir James,

Indeed, the MSR heat exchanger can be utilized as a partial windscreen. It's a great heat exchanger if a bit bulky. But who cares in winter when you've got a pulk? Even the 1/2" deep JB & Primus ETA heat exchangers do add some windscreen capabilities.

For winter snow melting (with a remote fuel source ONLY) I like the efficency of my aluminized fiberglass cloth OutBack Oven.

Eric