Keep it out of the crawl if you can. I can promise any future service needed will be less than 100% given by the tech since most crawls are not an easy place to service/repair.
We charge a few more $$ on repairs if in attic or crawl do to time to get ladder out or extrat time to crawl the space etc...
Depending on geographic region, humidity may be an issue.
if this is a new house, why not put in a boiler system? they can hang on the wall in a closet so they don't take much room and if it's installed right you won't even know it's working. i personaly like hydronic heat better than forced air mainly because of that reason, and i find it more comfortable. just a thought.
Originally Posted by Bigdog8
have the builder build an extra closet (inside the house) for the airhandler
it does not use up that much space
if i ever build another house, thats what i would do