We've Developed the Next Generation
                Sweet Smelling Toilet™

Most Vault Restrooms are Designed Using Outdated Technology
Developed by the US Forest Research Center, the “Sweet Smelling Toilet” concept, was a significant advance in the attempt to develop waterless toilets that did not smell. Now, over 10 years later, it is a seriously outdated concept, yet one that most restroom manufacturers still use.

The Original “Sweet Smelling Toilet” Principle
The “Sweet Smelling Toilet” system principally relies on solar gain to warm the air within a 12” black vault flue pipe, creating positive air pressure in the pipe, and thus a draft is pulled from the negative air pressure within the vault (tank). The goal is to cause the air in the restroom to go down the riser (toilet), through the vault, and exit up the flue pipe, keeping odor out of the restroom. However, fresh air is allowed to enter the vault only through a small 12” x 14” wall vent. Upper gable vents are closed off because the research stated that if the gables were left open, odors from the tanks would come up the riser and bring foul air from the vault, into the restroom. The problem with this design is that it doesn’t allow enough fresh air into the building to make the system work. Often the restroom heats up to the point where it is unbearable to use, and worse, the heat effects the air flow system so that when the door is opened, the rush of air causes foul air in the tank to come up through the riser, counteracting the draft created by the flue pipes, and filling the restroom with odor from the vault.

Improved Airflow Dynamics Leave the Original System Behind
Restroom Facilities Limited believed we could do better, and we did. After extensive research, our designers re-engineered the air flow mechanics of our buildings. We opened up the gable vents, using stainless steel wire mesh, and made other structural changes that countered, what the “Sweet Smelling Toilet” research stated was the problem with open gables. We also understand the importance of positioning these gable vents so that they work with prevailing winds for maximum ventilation and heat dispersion. The result is the “Next Generation” vault toilet design. With our proprietary air flow design, there is never a build up of heat, or positive air pressure, in the restroom. Therefore, the draft created by the flue pipes which draws the odor from the tanks to the outside is never compromised as it often is with the original “Sweet Smelling Toilet System” system.