Don't want CO though do you? Regards, Jim > -------- Original Message -------- > Subject: Re: [OT] Best garage heating option > From: Sean Breheny > Date: Wed, November 29, 2017 10:33 am > To: "Microcontroller discussion list - Public." >=20 >=20 > CO2 is heavier than air but CO is slightly lighter than air (1.145 g/cm^3 > versus roughly 1.2 g/cm^3) >=20 >=20 > On Tue, Nov 28, 2017 at 10:31 PM, Richard Pope > wrote: >=20 > > Allen, > > Very true. With our tarp setup it was completely open at the botto= m > > to insure that there was plenty of air for the heater and for us. Since > > CO2 and CO are heavier than air they would fall out of the bottom of th= e > > tarps and protect us from being poisoned by them. This is slightly > > different from a closed building where these can build up to toxic > > levels very quickly. > > Thanks, > > rich! > > > > On 11/28/2017 9:16 PM, Allen Mulvey wrote: > > > Much of the need for a "well ventilated area" is not so much > > > for fear of CO but rather a need for fuel. In a well sealed > > > environment you can burn off all your oxygen and asphyxiate > > > yourself. > > > > > > Allen > > > > > > -----Original Message----- > > > From: piclist-bounces@mit.edu > > > [mailto:piclist-bounces@mit.edu] On Behalf Of > > > mail@crcomp.net > > > Sent: Tuesday, November 28, 2017 9:33 PM > > > To: piclist@mit.edu > > > Subject: Re: [OT] Best garage heating option > > > > > > RussellMc wrote: > > >> On 28 November 2017 at 18:49, Gary Crowell > > > > > > > > > --- > > This email has been checked for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > > --=20 > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .