Pinnacle's current price is -142/+131, meaning the no-vig number is -136.5/+136.5
There is only one book (BetEd) who is handing out anything that would be +EV on Houston. Their price is +140, which after calculating it gives you a 1.89% edge on that price.
Which means you should be betting TO WIN 1.89% of your current bankroll on Houston +1.5 (+140) at BetEd.