there was lava inside of it.
I was recently abducted by aliens in the middle of the evening. I was sleeping soundly and I could not hear the UFO floating outside our window because I had our window air conditioner running on high. But, when I woke up, I was in a cool pale room with little alien creatures surrounding me. I sat up and took notice! The aliens were certainly friendly to me plus they gave me a tour of the ship. I, being an HVAC professional, wanted to see how their heating and cooling systems worked in the UFO. The aliens took me to a massive, glowing cooling system. They let me take a look inside and I was amazed plus a little confused on how the unit worked. The air conditioner had some odd orange glowing liquid that they used to cool the air. The actual air ducts were clear tubes that were installed on the outside of the ceilings of the UFO. The odd orange liquid was still visible in the air as it was blown by the air conditioner into the air ducts and then out the vents. It was incredible to see! Then I took a look at the furnace system for the ship. The unit was made out of stainless steel plus inside, instead of using fire to heat the air. there was lava inside of it. The air would be pushed through the chamber with the lava in it, and then blown into the air ducts and then out the vents. It was entirely a simple yet incredible way to make a furnace. Once I returned home, I began inventing my own heating and air conditioning system similar to the alien’s system.