Welcome to the forum. Your first picture should be your water heater. The second picture with the grate is your furnace. It's going to be difficult to enjoy your TT w/o these.
2004 F150 SuperCrew Lariat, 5.4L, Max Towing, CIPA Towing Mirrows, Timbren
2006 Jay Flight, 31 BHDS
Reese Strait-Line Dual Cam