I recently bought a house with a '93 Heatilator wood fireplace (EC36) with optional blower kit. The previous owner, a family member, did the install and never used it.
The fireplace works fine. However, the air flow from the Heatilator seems negligible. Holding a candle by the output vents shows air flow, but that trickle is not strong enought to blow out the candle. Sheets of paper, but not envelopes, can be held in position by the sucking power of the fans on the lower vents. On removal of the fans, they both blow very strongly. Blocking what appear to be side vents (20 circle holes) doesn't seem to change anything.
The chimney sweep who inspected things suggested the Heatilator/Fireplace was enough to over heat the room the fireplace was located in. That is easy to imagine based on the fan displacement once removed, but it just doesn't seem to move air relative to the fan speed and output once re-installed.
This seems to suggest a fundamental installation problem. The fireplace is in a framed-in corner, so my thoughts were 1) blockage or 2) air loss through an open cavity. I don't know how blockage could exist. As for #2, there is no outside air vent installed, but the manual suggests an outside air vent coverplate which, if open, looks like the only potential air pressure breach.
It appears that the faceplate cannot be removed for further inspection without cutting some drywall away.
It just seems that this should be diagnosable from the symptoms. But as my name suggests, I am not in the business and adequately familiar with the workings.
Any thoughts would be appreciated. TYIA.