tankless Water Heater Upgrade Help

[Ekbrass]

Hi there!

I’m new here and did a quick search on this topic but didn’t quite find my answer. Was hoping someone here has also upgraded their Montana to a tankless water heater system and what type of unit you got. We have a 3711FL and just bought the Fogatti tankless water heater, but failed to realized how much smaller the unit is compared to our 12-gal tank space.

My husband wants to return this and find a different unit that fits directly to our current spec, but from the research I’ve done, that doesn’t exist so people just retrofit the standard size tankless systems to their rig. I’m of the (probably egotistical) belief that we are perfectly capable of retrofitting the tankless unit and then just slappin’ the original door right back on so it doesn’t look like anything was done at all… but he thinks I’m delusional haha

So I guess what I’m asking is if someone can confirm that we should NOT return the unit, and that we CAN retrofit the unit, and ultimately will HAVE to retro for any unit we get because they all will be significantly smaller than the space regardless…

I appreciate any and all input in advance!