Agreed, Greg, The acronym has a lot of history. It's not good to stray too far from a recognized brand.
Radiant Reburn Mass Heater - RRMH
"Radiant" is a soft, friendly, descriptive word. It's tactile, feminine.
"Reburn" suggests advanced engineering and efficiency. It's technical, masculine.
[Gad, marketing is such bullshit. Except it's not.]