Here's mine, it's a '76 Fisher Stove that was modified my step-dad to have a hot air blower, it simply traps heated air in a channel behind the stove then has cool air blown from a fan underneath up through a zig-zag path and out the top..

I barely ever kick the blower on but once I do, the temperature in the living room starts to rise awful quickly.. he welded that on one day when he had the Stove out at his place when we were doing some repairs in that room, (without telling me that he was gonna do it I might add)
It's hard for me to say wether it helps or not, yeah once it's turned on the temps definitely go up, the problem is that the stone behind it now doesn't get the same kinda heat It used to radiated on it so the stone doesn't get as hot..

So there is a loss in order to have a gain if that makes any sense.. it's not like that Warner W-130-B where it has a blower that takes its heated air from inside the firebox itself.
My step-dad designed his own outdoor boilers, and are a pressurized closed loop system that way outlast and outperform the like Woodmasters or Heatmasters or similar products, I give him all the big knots or ugly pieces I don't burn as well as the species that aren't as good as the Oaks or Locusts or Fruitwoods I like to burn..
