Most heaters in the industry are wall mounted. This method, in addition to being noncompliant with the ASSE standard, is simply unable to deliver the same amount of freeze protection as is provided by a floor heater. Because of the door configuration, wall heaters must be mounted to one side. And because they do not meet the wet/damp requirement, they must be mounted at a minimum of 12” off the slab. Remember that heated air always dissipates straight up, so these heaters’ warmth channels straight out of the top of the enclosure long before uniform warmth is achieved. Click here to get all the answers to your enclosure heaters questions.
On the other hand, a slab mounted heater provides heat to both the internal equipment as well as the up to 16 inches down into the riser pipes beneath the slab. These heaters will maintain an interior temperature of 40° with an outside temperature of as low as –30° as is needed to meet ASSE 1060 requirements. Safe-T-Cover’s patented slab mounted heaters are certified for wet/damp conditions. This is obviously necessary for waterworks equipment and really any enclosure that is not water tight. This unduplicated, rugged design has proven reliable for backflow preventer protection in severe environments for years.