I have had a few electric dryers that were fine, I'm trying to remember if I had a gas dryer in an apartment ever, but I'm not sure. Anyway, you still have the issue of venting the hot air out through the wall or ceiling.

Get a condensing dryer, or a heat exchange dryer. Then you don't have to worry about venting. This is the wave of the future for dryers. Europe only uses this type of dryer, and some in the US are going this way, I believe.

Heat pump dryer. Not condenser! Miele is introducing a less expensive model in the US next month. Regardless, not running a gas line and/or not installing a vent through 18” stone walls sounds like a savings to me. I just put in the W1/T1 and don’t miss my gas dryer at all. In fact, it’s still in the basement, along with my water hog top loader! Laundry upstairs is a great idea.

Good luck.

I will tell you a ventless dyer is horrible I have udes them in a few places in Europe and they take forever to dry and all the stuff is wrinkled beyond beleif when it finally dries. I never like gas dryers they discolor clothes over time. I assume you are not in the US since your are converting a much sought after bedroom to a laundry. room

A heat pump dryer (like the one mentioned above,) is completely different from what most people think of as "ventless."

That’s the miele combo that is somewhat new to the American market. There’s a long and detailed thread about it in the Laundry forum.

The W1/T1 refers to expensive Miele compact washers and dryers. Given that you are converting an entire bedroom to your laundry room, the purchase of compact appliances would probably make little sense.

Whirlpool makes two (and aparently the only) full-size ventless dryers, models WED7990FW and WED9290FC.. TheLG WM3500CW is a Consumer Reports "Best Buy" full-size washer.

Maybe the OP can decide what size machines suit his/ her laundry room ;-)

One of those Whirlpool machines costs more than the Miele, and both cost more than the Miele which comes to the market next month. I’m not advocating any particular brand, but the other significant advantage for the Miele in an older house is that it does not require a 220v receptacle, which every other electric dryer will. That’s another savings. An old house with stone walls and a slate roof is not without its challenges when it comes to adding amenities. That’s where I do think this particular appliance could make a lot of sense for you. Good luck!

The requester would need to install hot and cold water pipes and valves, a drain pipe, and dedicated electrical circuits for the washer and dryer. She should install a 220 volt circuit for a dryer as she would be otherwise limited to uncommon 120 volt electric dryers.