CO2 Placement

What type of heat? I'd keep them low on and on the level lower then the combustion heat.

I think the heat will be gas. There are gas lines running through the house leftover from the original construction. There are 8 fireplaces! Will expect some trouble with the smoke detectors as the fireplaces are in all of the bedrooms.

Do you mean "CO", or "CO2". Two completely different gasses with completely different properties so detector placement will be critical.

I think it would be wise to just read the directions and follow the mfg. recommendations for installation of the unit in question. js

The recommended height is 5 feet above the floor ("breathing height," according to one manufacturer). Place a detector outside each bedroom and consider placing one near the furnace if it's gas fired. The same applies to fireplaces and other places where combustion air has the potential to mix with room air.

Some manufacturers recommend against placing CO (not CO2 by the way) detectors inside bedrooms due to problems with aerosol propellant (hairspray, for example).

Well what if there was a massive soda bottle rupture due to global warming, you could suffocate on all the carbon dioxide.

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| | | Do you mean "CO", or "CO2". Two completely different gasses with | completely different properties so detector placement will be critical.

Not if your CO2 detector is located PROPERLY. js

Perhaps so. Absent a spec from UL I just follow the manufacturer's instructions. ISTR Macurco says 5 feet up. YMMV.

Additional comments:

I just noticed a change in Macurco's recommendations. They now suggest bedroom locations as well for their CM-S1 detector. I guess they've licked the problem with aerosol propellants.

FWIW, they're a good brand. If you've not yet settled on one, you may want to consider them.

I trust you,

And that presumably, based upon my near-fatal experience with putting too much dry-ice in a monster fog machine, would be UNDER the sody-pop.

I put in a GE couple of weeks ago and they recommended 5 fff and Up...even on the ceiling, which is where I put it; above the mbr door.

| Bass Home Electronics | 941-925-8650 | 4883 Fallcrest Circle | Sarasota · Florida · 34233 |

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I think if everyone would simply read all of the opinions that have been posted in this sage group in the past, regarding the placement of CO detectors and taking a consensus of all those opinions, it would be quite clear to anyone with any intelligence at all ...... that it was ok to mount a CO detector anywhere. As long as the main panel had and earth ground ..... ummmm .... or didn't.

Please remember to ground your plastic back boxes too.

like in this faq...

The NEC permits use of plastic boxes with non-metallic cable only. The reasoning is simple -- with armoured cable, the box itself provides ground conductor continuity. U.S. plastic boxes don't use metal cable clamps.

The CEC is slightly different. The CEC never permits cable armour as a grounding conductor. However, you must still provide ground continuity for metallic sheath. The CEC also requires grounding of any metal cable clamps on plastic boxes.

The advantage of plastic boxes is comparatively minor even for non-metallic sheathed cable -- you can avoid making one ground connection and they sometimes cost a little less. On the other hand, plastic boxes are more vulnerable to impacts. For exposed or shop wiring, metal boxes are probably better.

Metal receptacle covers must be grounded, even on plastic boxes. This may be achieved by use of a switch with ground connection.

The problem is there isn't a consensus. Different manufacturers specify different locations. I follow Macurco's advice because that's my favorite brand. I understandf their reasoning though, and I agree with them. CO mixes readily with air. Although it is warmer than air when it first emerges from the fire, it quickly mixes, especially if being pushed through a forced air HVAC system.

If I installed one in a furnace room I'd place it at ceiling height. But in or near bedrooms I would go with the 5 foot height. YMMV.

I ground my plastic boxes with fiber optic cable, allows for faster transmutation of electrons.

| | Please remember to ground your plastic back boxes too.

I prefer to use bungee cords. The elasticity helps deal with changing voltages.