Laundry forum.

And I'm not familiar with any propane-powered washers.

Does the laundry forum get any visitors anymore?

The question is what application are these for? RV? Off the gird? Do you have electricity? A generator? Would burning propane in the dryer be more or less efficient than using it to run a generator to run the dryer. Intuition says the former, but I don't know how efficient dryers are. I think the issue would be the price and availability of propane vs. electricity.

What about hot water? Will you be using a water heater, or do you need the washer to heat the water?

I know that the same old makers make some of the same old machines: Whirlpool, Amana, Speed Queen. People around here love regular Speed Queens when they're looking for inexpensive, simple and reliable. I don't think any of them heat the water, though. That mostly happens on European machines.

There are some propane appliance specialists on the web. You might start with them to find models, then look up the models on the manufacturers' websites to read the documentation.

Do you really mean propane for the washer?? I have propane for my dryer, but the washer is electric and the dryer motor uses electricity as well. I believe just about any gas dryer can be fitted for LP or LNG.