Having read about Powdery Mildew 'til my eyes bled I've come up with what I hope will be a sound, economical solution to the problem. As all roads seem to point to Sulphur Evaporators as the end-all fix for PM I eagerly looked into acquiring one. After a pretty short look I learned that these things are very simple and VERY expensive for what you get. Basically, the evaporating units are little more than a small quantity of sheet metal formed to a tube with a heat source that will allow the sulphur to vaporize and release it's hell-like goodness. The prices I ran into were staggering I thought. From $140.00 online to $200.00 local. Time to DIY for sure.
Here then is my approach to releasing the caustic fumes of perdition. I'll call it the Green Dragon. Credit for the green bulb is not mine as I copied that idea from a DIY'er that cleverly used coffee cans to make his unit.
Parts breakdown:
1- 6" recessed lighting can. $6.97
1- 6" duct end-cap $3.88
1- 100watt Green Outdoor Flood Light $5.97
1- 6' 3-conductor grounded power cord $3.99
1- Soup can .59
1- Quart container sulphur chips $15.00
Total= $36.40
I had everything at home except the end cap and sulphur so I basically scrounged the house for anything I could MacGyver with. I'd think that anyone with an ounce or two ingenuity could come up with better. It's that simple of a device. Just do it safely.
Here's the light can and 6" end cap (the duct coupling is not part of the assembly, it was only used to secure the cap for cutting later).
I removed the joist mounting brackets and internal components to allow for drilling.
I drilled out the existing power line hole to accomodate a romex strain relief clamp.
Soup can which will house the sulphur just above the hot bulb.
Wired the socket assembly back in. Don't fail to connect the ground!
Stuff everything back in with careful attention paid to where the wiring seats. Be careful not to pinch or chafe the wires.
Everything back in including 100w bulb.
The duct end cap in place for fitting and measurement. I then used the 6" coupling from the first picture to hold the cap stable for cutting with a jigsaw. The hole is cut intentionally larger than the soup can to allow for excess heat to escape. It will also use that rising heat to convectively disperse the sulphur vapor.
I am uncertain as to the appropriate distance for the can to be raised from the bulb for proper temperature (will determine that shortly), so I used a section of the joist hanging sliding mounts that were removed earlier. This will allow me to raise and lower the can conveniently so I can dial right in on the correct distance/temp.
This shows the necessary clearance all around the melting pot (soup can).
Here it fired up for the first time.
Hanging safely with chains.
I intend to to put this to use tonight for about an hour and a half once the lights are out. Evaporators should ONLY be used during dark periods. My regimen will be approx 1.5 - 2 hours every other night for a week, then once weekly or every other week for maintenance.
May a swift and merciless death befall my evil spores.
I'll update with progress as it comes.