Need advice on venting a dryer
Need some advice on venting my electric dryer to the outside of the house.
Currently it vents into the crawl space through a hole in the floor. The hole is right over the sill plate. That area is blocked from access to the crawlspace proper by a floor joist. I don't want to cut a hole in the floor joist, and weaken the floor support, as that part of the laundry room floor takes quite a beating from the washer.
It seems like the choices are to:
1. Go out the wall behind the dryer (onto the front porch).This would be the easiest and is my preference. It will be a little unsightly, but we can live with that. If I can place the hole directly behind the dryer's vent, this could be a 'straight' shot. The dryer might have to be placed on a short stand to line things up.
2. Go up into the attic and down through a new soffit vent. This looks iffy because of a tight space where the wall meets the roof rafters. Plus, I don't like the idea of going upwards a 'long' distance with the dryer exhaust.
3. Go through the roof. I don't like putting an extra hole in the roof, so this option is not desirable either. Plus, it involves going upwards a 'long' distance with the dryer exhaust.
We live in northern Alabama, so we get heat, humidity, bugs and cold.
Please take a look at the pictures and tell me what you think I should do - including any details on routing the vent, locating the hole(s), how to cut and seal the holes, whether I need to use a double walled vent pipe (where it goes through the hole(s)), etc.
Thanks for your help.