Suggestions for on damand water heater for IBA

[Scrub Free]

Just curious if anyone has recently installed a on demand water heater for their IBA. Looking for suggestions on products
Thanks

 

[APW]

I just fired this one up yesterday on my new wash. I installed it right next to the pump stand.
AO Smith ATI-310

 

[lighthousecarwash]

Installed 4 naviens last winter. They have been great.