UTH's used on the side?

They can be side mounted but are very inefficient. Most of your heating dollars go up with little to no benefit. It works it just takes more power to get the same temps.

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Originally Posted by Annarose15

Ridiculous that they make you dig that deep for a fire hazard warning, but I'm guessing you're referring to this line: "Always use the enclosed rubber feet to elevate your terrarium thus allowing the heat to escape. If unsure of bottom mounting, the side mounting of the ReptiTherm® Heater is the preferred application." To me, they're basically covering their butts if you're too lazy to use the spacers that are provided with the UTH, and too cheap to use a thermostat to regulate the heat output.

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I use the rubber feet (bumpers which are used to reduce impact on cabinets and drawers are fine). Then I mount the heat tape on a piece of old ceramic tile. That makes all safe as long as you use Tstat.