Thinking about putting a vent-free 10k BTU LNG heater in my 3rd floor bedroom. Right now it's a guest bedroom. It doesn't get that cold up there, and I wouldn't run the heater for more than a few hours a day to take the chill out before bed. Yeah, I'd rather vent. But drilling through 100 year old 12" thick brick doesn't seem worth it to me. I have baseboard heaters up there now which work fine but are phenomenally expensive. I've read the hype on both sides. Here's my thing: I've never had a house with a vented gas cook stove. They can put out more than 40k BTUs easy, and I've never had a problem with odor, moisture, nothing--and they weren't designed specifically for a vent free application. I don't like the idea of running it when people are sleeping, but I also don't like running the baseboard heat during sleep. So anyone have any positive experiences with these things?