I'm not sure what you can do less then installing an expensive air scrubber unit. I do not think you can completely eliminate the odor any other way without the extreme measures you wisely eliminated. O3 is dangerous. I think a unit could be created somewhat cheaply, but I have never designed one. Seen many however, basically carbon ventilation filters with treated water (water-bleach) running over them while the foul air is passed through 1-3 filters. Following the passage of air through the wet filter, a demister is sometimes is installed to lower the suspended water concentration but not always. Basically a reservoir and pump that mists the vertical filers in a sealed enclosure where foul air must pass through the filter. Water drains back to res.
It works great where I have seen the technology used. For example, at a wastewater treatment facility influent structure, the air is very foul (very) and is treated and expelled with almost no odor. For this to work this well, a homemade one should handle the plant odor as well as cool the air expelled from the room.
I would really try and find a way to vent to atmosphere. I use two fans in series on the same line to overcome the CFM/distance issue. One fan is off when dark to maintain a constant negative pressure in the room.
Also, unless you are at the north pool, the excess heat must require your AC to crank. |