My Breckwell P4000 Classic Cast is vented straight through the wall. About 2.5 feet of 3" with a 45 down angle at the end. Is it possible for temperatures under a certain amount to influence how the stove functions? When is was below 20 the other day we had all kinds of issues with the stove not running properly. Its above 20 now and everything seems fine. The stove has run well for over a day... Would it be a good idea to run some vertical pipe?