Glad you mentioned 400ppm, fun fact gas stoves are allowed to produce up to 250ppm. During days of heavy baking like holidays with the house all closed up or worse when people use ovens to heat this is how they get sick or die.
167 ppm air free. Checked everything from gas pressure to venting unable to lower under 100 ppm. Furnace 10 years old slightly oversized. Do you condemn the furnace??
Fieldpiece recently upgraded their analyzer. I took a class at Johnstone supply. The CAT85K2 is very nice. We’re getting a few before the next heating season.
The ANSI number of 400ppm limit is in air free readings. Not in as read samples of exhausted gases. Very important to differentiate. Our company follows the NCI rules. Over 100 as read is a repair or red tag scenario
Thanks for the helpful video. If there is no hole in the PVC pipe to do the testing and you mentioned you don’t drill one, how do you do the testing then?
I agree. Great video. I might ask, what about carbon monoxide testing inside the livable space of the residence? I , at one residence, read 110 ppm carbon monoxide built up within areas of the residence. The only item in that vicinity was the gas furnace. The problem was afforded solutions, needless to say, a check of the livable space may be of value
Reuben, Do you ever test for CO at the heat register? All the HVAC folks in this area (Oregon) set a CO tester at the heat register after letting the furnace warm up for 15-20 minutes, then let the tester remain there for 15-20 minutes. This is how I've been taught and how I've tested for furnace CO for the past 7 years. Any reason not to do it this way? Thanks for your videos!
Thanks for your quick reply! The reason I've been told they test this way (and why I also test this way) is to catch any CO entering the house through the air ducts, which pretty much indicates a crack in the heat exchanger. Like I say, I've tested this way for 7+ years and when the readings are over 12 PPM, It's almost always a cracked heat exchanger. I'm always looking for a reason to recommend a full servicing on the furnace, so any level over 5, I will recommend the furnace be serviced. Thanks for what you do for the home inspection profession, there is always more to learn! @@StructureTech1
Helpful video for sure. Thx! Did want to add testimony that an HVAC company that I hired to check a heat exchanger in Kansas also used the method that Bruce described. They checked CO readings at nearly every vent register in the home! Context: the traditional, older style of gas furnace -- the first of the three types you handily go over in the video.
In MI That’s the same way I’ve been taught and have been testing for years for simple certs for the city. Required by some for rentals or sales. only to test the integrity of the heat exchanger. Closest vent or drill a small hole in supply duct. Use the combustion analyzer in the exhaust to “tune up” or verify its running to manufacture spec efficiency.
Well someone shut down my furnace for 8ppm CO2..ITS WINTER🙄 I Didnt hear you say nothing at that level. They want me to replace the whole furnace I just got this one in 2012🙄 what do I do???
@@greazedlightninggarage6768 the system can have damages at the heat exchanger and per gas association if there is an breach at the exchanger the systems exchanger should be replaced or the furnace should. Sorry for the run on sentence it hurt my yes when I read it lol
@user-sz5tv4fv8n you know I'm with DTE appliances program and I ask for a 2nd opinion they told me we don't give 2nd opinions get you a new furnace lady😳🫨😬🤔 this was almost a year ago. Still no help yet. I got put on a program that's supposed to come and check my furnace and if it is a C02 problem I'll get a new Central heat and air unit.....that was told to me a few months ago...nothing yet and it's 14° out today 🥶🥶🥶🥶🥶🥶🥶🥶🥶
@@MsQsince2 what did you do? My company works the Detroit area. We could definitely give you a second opinion. And and an estimate for repair or replacement. I wouldn’t have shut you down for 8ppm in this weather. That’s more dangerous.
Maybe not for inspectors, HVAC tech yes. You can use a step bit to make a larger hole in the outer, smaller in the inner. When finished you can seal the inner pipe up with red high temp silicone and the outer with approved foil tape. Sometimes there’s a small collar before the b vent starts. If available I test there.
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Glad you mentioned 400ppm, fun fact gas stoves are allowed to produce up to 250ppm. During days of heavy baking like holidays with the house all closed up or worse when people use ovens to heat this is how they get sick or die.
167 ppm air free. Checked everything from gas pressure to venting unable to lower under 100 ppm.
Furnace 10 years old slightly oversized.
Do you condemn the furnace??
The scripture behind you is the best part of the video. Keep up the good work, sharing the good news of Jesus Christ with the world.
Which tester do you use? I've been looking to upgrade. Would like CO and natural gas all in one if possible
Have you found anything yet?
Fieldpiece recently upgraded their analyzer. I took a class at Johnstone supply. The CAT85K2 is very nice. We’re getting a few before the next heating season.
The ANSI number of 400ppm limit is in air free readings. Not in as read samples of exhausted gases. Very important to differentiate.
Our company follows the NCI rules. Over 100 as read is a repair or red tag scenario
Thanks for the helpful video. If there is no hole in the PVC pipe to do the testing and you mentioned you don’t drill one, how do you do the testing then?
I agree. Great video.
I might ask, what about carbon monoxide testing inside the livable space of the residence?
I , at one residence, read 110 ppm carbon monoxide built up within areas of the residence.
The only item in that vicinity was the gas furnace.
The problem was afforded solutions, needless to say, a check of the livable space may be of value
Reuben, Do you ever test for CO at the heat register? All the HVAC folks in this area (Oregon) set a CO tester at the heat register after letting the furnace warm up for 15-20 minutes, then let the tester remain there for 15-20 minutes. This is how I've been taught and how I've tested for furnace CO for the past 7 years. Any reason not to do it this way? Thanks for your videos!
Hi Bruce, no, we don't test for CO that way. I'm not aware of any HVAC contractor who does it that way in my area. When in Rome...
Thanks for your quick reply! The reason I've been told they test this way (and why I also test this way) is to catch any CO entering the house through the air ducts, which pretty much indicates a crack in the heat exchanger. Like I say, I've tested this way for 7+ years and when the readings are over 12 PPM, It's almost always a cracked heat exchanger. I'm always looking for a reason to recommend a full servicing on the furnace, so any level over 5, I will recommend the furnace be serviced. Thanks for what you do for the home inspection profession, there is always more to learn! @@StructureTech1
Helpful video for sure. Thx! Did want to add testimony that an HVAC company that I hired to check a heat exchanger in Kansas also used the method that Bruce described. They checked CO readings at nearly every vent register in the home! Context: the traditional, older style of gas furnace -- the first of the three types you handily go over in the video.
@@rickscovel9062 why not just test for CO at the supply trunk? Going to every register is ridiculous hope you didn’t get charged for wasted time
In MI That’s the same way I’ve been taught and have been testing for years for simple certs for the city. Required by some for rentals or sales. only to test the integrity of the heat exchanger. Closest vent or drill a small hole in supply duct.
Use the combustion analyzer in the exhaust to “tune up” or verify its running to manufacture spec efficiency.
In California we have a threshold at 225 ppm to be red tag and made safe.
good stuff; thank you.
Well someone shut down my furnace for 8ppm CO2..ITS WINTER🙄 I Didnt hear you say nothing at that level. They want me to replace the whole furnace I just got this one in 2012🙄 what do I do???
Facing something similar myself. Seems suspiciously scammy to me after watching this.
@@greazedlightninggarage6768 the system can have damages at the heat exchanger and per gas association if there is an breach at the exchanger the systems exchanger should be replaced or the furnace should. Sorry for the run on sentence it hurt my yes when I read it lol
Always get a second opinion unfortunately very common nowadays.
@user-sz5tv4fv8n you know I'm with DTE appliances program and I ask for a 2nd opinion they told me we don't give 2nd opinions get you a new furnace lady😳🫨😬🤔 this was almost a year ago. Still no help yet. I got put on a program that's supposed to come and check my furnace and if it is a C02 problem I'll get a new Central heat and air unit.....that was told to me a few months ago...nothing yet and it's 14° out today
🥶🥶🥶🥶🥶🥶🥶🥶🥶
@@MsQsince2 what did you do? My company works the Detroit area. We could definitely give you a second opinion. And and an estimate for repair or replacement. I wouldn’t have shut you down for 8ppm in this weather. That’s more dangerous.
So no testing on B vent ?
Maybe not for inspectors, HVAC tech yes. You can use a step bit to make a larger hole in the outer, smaller in the inner. When finished you can seal the inner pipe up with red high temp silicone and the outer with approved foil tape. Sometimes there’s a small collar before the b vent starts. If available I test there.
👍
Carbon. Then monoxide. You keep mispronouncing the molecule. Great vid.
is it ok to put a carbon monoxide sensor in furnace room? I've read so many conflicted takes on that