We have an Ellington Knightsbridge ceiling fan on our screened porch. It's awesome.

As for decorating, right now I have DH's grandma's iron loveseat, chairs, and tables. There are a couple of hanging baskets with geraniums & trailing petunias, ferns on iron stands, a planter with Gerbera daisies, and an iron rack that holds individually potted herbs for use in the kitchen. There's also a green wicker magazine rack along with a few cutsie knick knacks. It's a jumbled mess. LOL

The screened porch is my project for this week. I need to add a quick coat of paint to all the furniture, paint all of my pots so they're a little more interesting than plain terra cotta, and make the cushions & pillows. DH wants to put a rug out there, but I'd like to paint something fun on the floors. It's still a toss-up.

Our porch/lanai is 62' by 18' so it's a challenge. I have decorated it like there are several rooms-dining room, game room, and living room as you can see below. It's just yard sale and thrift store finds:

I have three Old World hanging light fixtures and then two light sconces flanking the French doors at the far end. One word of warning about the lights you choose: birds love, love, love to build nests and perch on them, so keep that in mind when you choose. I'm in the process of buying new sconces that don't provide perfect nesting spots on top of the uplight portions. Until then, the top bulbs are unscrewed for the everyone's safety.

I have three seating areas, two of which have end tables with sturdy lamps on them for more cozy lighting. One of these seating areas has a porch swing, and we love sitting there at night watching the lights down in the valley below us. Last Summer we bought a new (old) dining room table and chairs. Because our portal is so long, I put the old table and chairs out there so that we can have our weekend breakfasts outside when the weather is warm. It really comes in handy for parties and is a good spot for card games, too . . . on non-windy afternoons, that is ;^P

Here's a couple pics of mine from a few years ago. So, look at these as my Before pics. I'll be posting more whenever I get it all finished.
Lynn

This is the main seating area for our front portal. The porch swing and table area are to the left of our front door. I've made new slipcovers for all the chairs since I took this pic. Fireplace is a wood-burning kiva (beehive) one.

From this angle, you can see the third seating area. It has a built-in adobe banco (bench/sofa) that provides extra seating, gives us a gorgeous view down the valley . . . and keeps visitors from tumbling off the end of the porch and down the hill during parties! I have a rustic coffee table in front of it. Lighting comes from the two wall sconces. I have large throw pillows that I put out there for extra comfort when we entertain.

When my neighbors cut their grass or blow the grass, all the dust from their mowers and their pollen seemed to settle in my porch. I could clean it impeccably and you could see dust flying into it while they were cutting and mowing, even with our ceiling fans, but the problem seemed to be as #3 son explained it, the design of the house, the way our weep holes and attic fans as part of the construction and the design of the porch sort of trapped everything.

It seemed like we had a dust galley with no opening or to a wine cask without an air hole sotaspeak.

We have a lot of pollen around here. Even so, I have a deck and a porch that I will decorate someday in spite of the pollen and my aberrance to cleaning.