First of all thank you for inviting me.I have submitted my proposed design for you!
Please take a look and provide some feedback for me to know if I'm on the right track.
Design #6496481

I like where you are going with the "H" in heat. Maybe add another horizontal bar and turn the 3 bars into a color gradient from cold to hot (heat rises...). Not a big fan of the image above

I have submitted another design.Take a look.!