I was given a new heater from someone who is deceased. It is a
Timberline NVT-11173R. A local fireplace store told me they believe it
is a non-vent design but I think it must be a vented design because
the instruction plate states "Warning: For installation in a solid
fuel burning fireplace". I have tested it (outdoors) and it works
Timberline is no longer in existence; I think they were bought our by
How can I be sure?
If it is a non-vented design, I think it requires an oxygen depletion
sensor. Is that correct? Is that something that can be added?
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