I got such a good laugh out of this post I felt the need to share it.

CO2 by breathing

Can you imagine sitting there for an hour exhaling into a garbage bag and hooking it up to your system?!?!

Here is another local invention in our plant group in Phoenix, AZ along those same lines: New DIY co2 unit

All joking aside, using a straw is a good way to do rough testing of CO2 detectors. You put a couple of cups of water in a container, use a piece of airline tubing as a straw and huff and puff thru it to build up CO2 in that water. I was able to get to 10 ppm without major effort. By repeating the huff and puff about every 15 minutes you can keep that level too. But, never do this while standing! Hyperventilating while standing isn't good!

Yes, I recall when Paul suggested that.

Regards,
Tom Barr