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Author Topic: Help with primitive sterilization box  (Read 257 times)

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Offline Jim gaster

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Help with primitive sterilization box
« on: September 23, 2021, 10:42:47 PM »
I plan on using 500 watt halogen lamps to heat my box. Its insulated to r13. Its 6' w x 14' L x 2' tall. 

Any suggestions on how to cycle the lamps to maintain temperature?

How hot do I need for 8/4 and 10/4 to kill bugs and or set pitch?

Offline Ianab

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Re: Help with primitive sterilization box
« Reply #1 on: September 23, 2021, 11:52:39 PM »
Something like this for temperature control? (Random Amazon search). But it can be set from -40 to 212F, has a fancy display, and can switch up to 15 amps. So it should do the job. 
Amazon.com: Inkbird Temperature and Humidity Controller ITC-608T Pre-Wired Dual Stage Thermostat 120VAC 15A 1800W ETL Listed Mushroom Greenhouse Homebrew : Appliances

Bugs die at about 135F, held for a couple of hours. Thicker wood just means it takes a little longer for the heat to work in to the core. 

Pitch setting varies. If you heat the wood to 140F, that will kill the bugs, and the lighter parts of the pitch should evaporate. The wood shouldn't bleed (much) unless it goes over that temp in the future, then heavier chemicals in the pitch can still start to melt and run. So 150 or 160 might be used, which will of course do a number on any bugs even quicker. 
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Offline caveman

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Re: Help with primitive sterilization box
« Reply #2 on: September 24, 2021, 06:15:21 AM »
Ian, the Ink Bird thermostat controller that you shared the link to may be the cat's meow as far as controlling sterilizing temperatures.  We have to do a little repair to our box - I got it a little too hot on the last load.

If we were to plug our 500 watt lights into the controller, set the desired temperature, will this apparatus just turn power to the lights off and on as needed to keep the temperature at the desired level?  

Thank you for sharing this.
Caveman

Offline doc henderson

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Re: Help with primitive sterilization box
« Reply #3 on: September 24, 2021, 06:27:53 AM »
this is a great idea.  not sure how much you plan to do in each batch, but you will have to allow for some room between the lights and the wood.  and prob. a fan to move the heated air around.  
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Offline samandothers

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Re: Help with primitive sterilization box
« Reply #4 on: September 24, 2021, 10:47:03 AM »
Jim do keep us appraised as you progress.  I have thought about doing one of these too.  I enjoyed caveman's build.  If you don't mind as you go share how you plan to construct the box and type of insulation.  Also what type fan you use.  Inquiring minds you know!
Thanks

Offline KenMac

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Re: Help with primitive sterilization box
« Reply #5 on: September 24, 2021, 04:29:07 PM »
If you need more amperage than the previously mentioned thermostat you can always use the t'stat to control contactors to bring in the heat source. Then your amperage is only limited to the power available. Just use contactors of appropriate rating and coil voltage. Good luck.
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Offline willscot

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Re: Help with primitive sterilization box
« Reply #6 on: September 27, 2021, 10:40:18 PM »
Keep in mind the wattage rating of that controller. 1800 watts will run 3 -500 watt bulbs.
15 amps at 120 volts = 1800 watts, so that particular controller will handle all the power available on a 15 amp circuit. 


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