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  • Users: cosmology
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  1. cosmology

    RPN Calculator? RIP HP 35s

    Was going to bop over to amzn and buy another HP 35s after I lost one recently. Turns out they are several hundred dollars now. The other HP model doesn't appear to do RPN. Has this gone the way of the Dodo? Are there any calculators out there that do RPN? Thanks
  2. cosmology

    Maybe easy HVAC question: net air loss from space

    Hey all. HVAC is not my area. I'm trying to find a way to air condition a shop space. I bought a portable A/C unit. I need something bigger, but that's not the point. With the portable, the thing exhausts a ton of air. It has a hose and you send the hot exhaust outside. So, my issue is...

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