I purchased a used regency i2400, manufactured in 2010. I installed it with 23 ft of ss liner in a chimney and insulated with vermiculite. It did not come with the blower or the surround and I have been using it that way. Its been putting out great heat but I found it burns too quickly even with the air regulator at the minimum setting. Using an ir thermometer, the stove top gets to the mid 400s or more. I'd say the burn does not last more than 4 hours. Would using a blower cool the stove somewhat and help give a longer burn? Am I wasting fuel/heat by not using the blower? I suspect not having a stove surround in place helps the hot air to circulate out of the hearth. I am satisfied with the heat output for my 1500 sq ft house, but if it would increase the efficiency a lot, I might spring for the blower unit. Any insight would be appreciated. Thanks!