such as a "fish house" or "a tent in the middle of nowhere." Kvalseth also believed that the warning was "misleading" because it juxtaposed the caution against using the heater in "unventilated areas" to the caution relating to the risk of fire; according to Kvalseth, that juxtaposition might cause persons to think that the caution relating to ventilation related only to a risk of fire rather than to other risks such as asphyxiation.
Finally, Kvalseth opined that the warning label's lettering was too small; that the label's coloring was inadequate because it was *266 black and white rather than a warning color such as orange; and that it was not located where it was easily visible.
The foregoing testimony constitutes ample evidence from which the jury could have found thatwhether the Focus 15 met consumer expectations.
We agree with plaintiff. At trial, she offered the testimony of Robert Engberg, a mechanical engineer with experience in designing gas systems and in investigating accidents involving liquefied petroleum gases, including propane. Engberg testified in part regarding oxygen depletion sensors; he testified that they consist of a "pilot light and thermocouple assembly," described their operation, testified that they "are very widely used in Europe and are becoming common and more used in the United States," and testified that they have been commercially available since at least 1982. He also testified that he believed that it was feasible to have incorporated an ODS on a Coleman Focus 15 heater and that, when he modified a Focus 15 heater by incorporating an ODS, the