@Jesslyn Dalton You’re Welcome. Happy Camping

Your probably referring to the optional fan for the sleeping area. I Turned mine on in Arizona desert camping long enough to get the air flowing and then turned it off. I am happy to have it.

No when we are talking about the hatch being open refers to cooling. In winter just crack a side door window

Most tear drop trailers have a power fan mounted in a 1ft square hole in the ceiling. Steve eliminated that from his trailer because they tend to leak as the trailer ages. After owning mine for a year I agree with that decision based on the fact that the room with a view window is very large and provides reasonable cooling with the side door window. Also in brown bear country it is usually cool enough that you do not have to have the kitchen door open.

The real genius of Steve and Mandys Tear drop is the Elimination of the fantastic fan. With the (room with a view window)and the two side door windows I was kept reasonably comfortable wintering last year in Florida, Texas, Arizona, and Nevada.

Every thing I have looked at is always too large or takes too much room. with the 12 volt throw blanket and some nice wool on top I am toasty. Check out UTube site Playing with sticks. An Alaska Couple with kids that explore every aspect of Tear drop camping. Happy Camping Glenn

yes about 1inch works fine for me. It gets a little stuffy if you don’t.

I was surprised that even though the side walls are not insulated, due to the undercarriage insulation and the roof insulation it remains warmer in Alaska and cooler in Arizona than sleeping in the van with no insulation.

You will have to use the inverter or a portable power station to power the heater and thermostat.

go to Amazon. Buy a good quality 12volt electric blanket. (about $28.00)At Amazon again purchase the Honeywell small 300 watt heater with tip over protection. (About $30.00)The last purchase is a digital reptile terrarium thermostat about ($20.00) I hung my Thermostat on the wall just below the slide out shelf, plugged my little heater into the thermostat, plugged tha thermostat into the power strip provided by Steve. Now you are heating your core with the electric blanket and heating the teardrop with the little heater all for about $78.00. Good luck Glenn from Alaska