4 ms·> focus on making a heat pump that’ll last forever Nothing last forever.by alacombe 6y ago> focus on making a heat pump that’ll last forever Nothing last forever.hedora 6y agoIt just needs to last longer than me. Bonus points if the kids don’t need to touch it.alacombe 6y agoYou really don't seem to know how the physical world works. And your "military grade" requirement is utter horseshit, as things break all the time in the military...