As long as you have a table top burner that can put up a decent flame it should be fine.
( the innards of the box is just a long coiled tube of copper )
Be aware that the flow rate isn't going to burst the pimples on your back.. it's (OK for camping and good enough to have a shower - and it's hot!
I also bought the shower stand ( metal tubes ) and the shower cubible ( at the time they didn't have the one shown on the website ) - I ended up with more like a Toilet tent.... but - it can be build in about 30 seconds - The tent and frame are sown together and just spring lock.
I'm a happy customer - and the others in my LM group are quite impressed.
If you have any other questons- just holler
Cheers
Gaspode