Are you seeing any discharge or gasping? Is he eating and active otherwise? I'd definitely schedule a vet visit anyway, since he's new, but if you aren't seeing really obvious signs of illness other than some snuffling, make sure he is getting soaked regularly and try increasing the heat a bit.
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Sohni
Northern California
0.1 Baja de L.A. Rosy Boa
0.1 Okeetee Corn Snake
1.1 Rubber Boas
1.0 Leopard Gecko
0.0.2 Hermann's Tortoises
plus my kids' herps:
0.0.1 California King Snake
1.0 Mexican Rosy Boa
0.1 Leopard Gecko