Heatilator not producing much heat

tsandNovember 14, 2007

We have a Heatilator direct vent gas fireplace model NB3630. It was installed 1.5 years ago by the builder of our new home (Lennar).

The fireplace is on an interior wall with a fan, direct vented up to the roof.

Our issue is, even after hours of use per day, the fireplace doesn't seem to produce much heat. Also, the flame is only 3-4 inches, just barely clearing the log set.

We have complained to the builder who had the contractor that installed the fireplace to come out and look at the box, they say all is working as it should.

We have thought about replacing the fireplace with a furnace rating unit, but because of the smaller size of the Heatilator, we can't install a much larger unit without tearing out the wall and mantle to re-frame.

My question is what should we expect for heat on this unit?

How can the heat be measured?

Can we turn up the flame and get some heat?

If this is all the heat we can get, does anyone have suggestions on how to change out the unit with something that will produce some real heat, without re-framing.


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The NB3630 is a B Vent fireplace (not a Direct Vent). B-vent fireplaces are tested and listed as a decorative appliance. Where a direct vent fireplace (ND3630) is tested to a heater rating standard. There's no improving what you have in the NB3630. If you want heat, you'll have to do a complete fireplace and flue change out.

If your builder's contract stated that you were geting the ND3630 direct vent version, then you should have a conversation with them about that.

    Bookmark   November 14, 2007 at 10:17AM
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