Posted 2021-March-10, 20:04
This depends on your partnership agreements/tendencies.
The 12-14 1N opening system I play is Kaplan-Sheinwold-derived, not Acol, and the tendency in K-S is for pass to include 15-16 balanced, which suggests bidding 3H with this hand, though with such a good defensive hand, pass could work.
OTOH, it seems to me from this forum that the tendency in Acol is for double to include 15-16 balanced, which suggests you pass with this hand. Note that, if double includes 15+ balanced, then pass implies an unbalanced hand and therefore at least a 5th heart.
In this auction, where responder has already shown some values, it really doesn't matter much which way you play, but there is consistency with the rest of the system to consider. (And, as for which way is better for the rest of the system, each has its pluses and minuses; if there's a difference it's that one way is better on 3% of boards and the other is better on 2.5%, so you should just play the way that's more intuitive for your partnership.)