Are formaldehyde-free deodorizers as effective in heat?

Formaldehyde-free deodorizers can be less effective than the old formaldehyde-based ones in extreme heat. The biocide in formaldehyde-free formulas breaks down organic waste more slowly and may not suppress odor-causing bacteria as long when temperatures are consistently above 90 degrees. On a 200-person construction site with eight standard units and one ADA-compliant unit, your weekly service is adequate for cooler months, but high heat accelerates waste decomposition and odor. You are already meeting OSHA 1926.51 for construction sites, which requires one toilet seat and one urinal per 50 workers for 200 or more employees.

Upgrading to deluxe units with flushing bowls and sinks helps with odor in heat because the flushing action reduces splash and the enclosed bowl with a trap seal minimizes fumes from the holding tank. The ventilation is also better. However, the deodorizer in the holding tank still does the main work. For a summer in Dallas, you might ask your rental company to increase the service frequency to twice weekly during the hottest months. That extra pumping and recharge of the formaldehyde-free deodorizer will control the sour smell better than any unit upgrade alone. A restroom trailer would offer similar flushing benefits but requires power and level ground.