Ambient heat only is the best

[DennisM]

Keep in mind: What works in one house may not work out the same in another.
I wouldn't recommend any major changes like this with less than 30 days trial. J/S

I don’t see this as being any different than setting up a new cage or rack using heat tape, uth etc. The setup should be closely monitored at first in either scenario.

Something to consider in the ambient arrangement using an oil filled heater is that your heat source is putting out a lot more heat than an individual uth or strip of heat tape, mine is 900 watts. This can result in wide variances in even a small room. I use a ceiling fan to keep things balanced. It’s important that the heater not be too close to any given enclosure. I give mine 18-24 inch leeway.

While ambient heating of an entire room may not be the most common method of keeping reptiles, Josh is by no means breaking new ground here. The method is firmly established as safe and effective.