Bad Furnace! Exhaust Flue Draft Pressure Testing 

A fly and a flea in a flue. The fly said let’s flee the flea said let’s fly, so they flew through a flaw in the flue. Thanks for the video.

Great demo, Corbett! Excellent presentation. Thanks!

You said it man. What's interesting is not how unique this is, but how often we see dangerous installations like this.

I have the same one you show in this video with the spillage coming out right where you had you're hand.. What can I buy to fix this..I have no choke off point mine is the same going out the chimney?

Thanks so much for your answer. If the BPI expert determines that is a boiler malfunction or a malfunction installation.. Does his report will be enough to get the boiler replaced? Weill Macklein asked me for a plumber report.

This is some crazy hacked-up bullshizzle!

Hey, Dig the videos, Very helpful. Say im exhausting 800cfm inline fan going from a fume hood to outside, and this is all being done right next to the water heater/furnace in a laundry room and been kind of getting a numbness in the nose n ear with a bit of confusion. is there a good chance its coming from the furnace/water heater even without the furnace running? Im almost possitive the hood im using meets the fume hood requirments of removing 2000-3000fpm at hood face thru a 6inch duct to 8inch at fan.

man i like your vest you got some fancy badges on there . I wish i had the time and money to pay all those outside agencies off to get my badges im to busy installing oversized equipment to take a week off and get my badges .

Where did this test come from? Wouldn’t the pressure switch prove the efficiency of the flue pipe pressure? The holes drilled in the flue pipe will no release exhaust gas into the structure. I have never heard of this test.

great video man, i have a question, can i use my uei em201b manometer to do the flue vent draft pressure test like u did? 😀thanks

I'm having a problem with our oil furnace in the basement. When it runs we are smelling an exhaust odor on the first floor right above where the furnace it, it's a strong smell of a car exhaust-like odor concentrated in one corner of the room, the smell takes about 15 min to dissipate after the furnace shuts off. This started about 3 days ago. I don't have the money for a repairman & I'm concerned about CO2 in the house, we have the windows open & the place is ventilated but is there any way to know what can cause this & is it an easy fix? Also when the furnace turns on there is a thump that we hear in the basement, I sometimes hear this thump while the furnace is running at times it happens twice while it runs, the thump has been going on for a while but I'm wondering if it's related to this new odor problem.

You say that you can feel the combustion gasses coming out of the pipe, but that's extremely unlikely. You'll feel heat, but that doesn't mean that the gasses are leaking. The fact that you have a good flow in the small part of the pipe proves that it's venting strongly and that opening may not be a problem at all. You would need to use something that can show air flow near the opening to know if it's sucking in or blowing out. A match can easily show the air flow direction.

I have a problem where my furnace will turn on and blow warm air for a minute or two, then blow cold for the rest of the cycle and it will do this about four or five times before turning off and not turn back on. It only turns back on when i turn the thermostat off and then back on, , could this be from that pipe being clogged?

Mr. sheldon cooper is became a furnace contractor.

What pressure would you want to see on a 2” flue vent to outside from a 3 burner 60,000btu furnace? I have some flame rollout and doesn’t look like an HE crack. Wondering if the inducer fan is under performing or if flue vent is clogged.

Wait, so no explanation on what the actual 'fix' is for this particular setup?

Does that exhaust ever get clogged?

What is exactly do you do Are you a building analyst? Which bpi do you think i should complete? Plz help

i don't understand this: you pierced holes in the chimney to insert the probes?

Looks like your gonna make some money on that call, is that just an 80%er should sell a 90% and run that PVC flu and is that into a fire place ?

This is exactly how the force draft is set up on my furnace. "Atmospheric draft". The guy who installed it claimed that no fumes would escape. Can you suggest where I might get the proper enclosure. The unit is a trane xr80. Thanks for posting this video.

Small plumbing company installed in my house a brand new Weil Mcklein Boiler 6 months ago. Flu Pipe Test is positive to CO2 8 times out 10 that is tested. Installers don't want to take any responsibility because they claim that it could be the water heater or the chimney. I never had this problem with the old boiler and it was the same chimney and same water heater. Other Plumbers agreed to come, check and give me a report but they would shut off my services if the test is positive and I know it will. Those who did tests before don't want to me reports. In 5 more months my guarantee with boiler distributors and with bad installers will be expired. Please help me out. I am woman alone with a house to take care and I am devastated with this situation.

Something weird here! The flue pipe leaves the appliance in 4" increases to 6" and then reduces to 4" before entering the masonry chimney? Comments please, Home Performance?

My point is that its obviously useless doing any testing with such venting in situ. You never mentioned the non code venting in your vid? Neither did you mention the lack of vent pipe supporting straps? You dont know where what "idea came from"?

Shut that system down, its illegally installed. A giant liability to every technician who touches it. GIANT LIABILITY! A DEATH TRAP with CO spilling into the basement,, The system was never inspected. The state of Mass. has the toughest codes ever for good reasons, these kinds of installs. Dangerous is an understatement. Deadly Install. in mass. we have to notify home owner. call gas inspector, they will Lawfully go after the installer, The gas company if natural gas, needs to lock out the gas meter till fixed.. This repairman, the minute he seen this install as it is, should have the home owner in this video explaining why its being shut down, to other installers, take a hammer drill, drill a circle of holes, enlarge the chimney opening, duct properly, insert clay thimble, round if possible, size accordingly, always bigger, never restrict flue gasses, use Portland cement at clay brick chimney, stucco around repairs, use up left over cement., learn to be better installers, your career is over when you kill someone from CO poisoning, good luck Warren

What a foolish reply: you dont seem to realise that that vent cannot give any kind of useful reading - so much for your reference to science. I understand perfectly well how gas installations work.. That vent is creating a dangerous condition esp. as it goes into the masonry chimney which, by the way, is also a non-code entry into the chimney! Your reply is essentially an attempt to cover up your ignorance and lack of practical experience. Try telling an on-site Plumbing Inspector about your theories?