The standard barometric draft regulator uses the fact that when a gas is heated it is lighter than air and wants to rise.This principal has made it possiable to have some control of the over fire pressure in the firing chamber so necessary in controlling the fuel air ratio.The down side, is it can waste up 20% of the fuel due to the heated air being pulled out of the heated space.There are more losses due to air moving through heat exchanger and up the flue, the exit temperature of the flue gas from the appliance must be higher to compensate for the cooling effect of the room air entering the smoke pipe, the slow response to changing out door conditions which upset the fuel air ratio. There is a new and improved draft regulator based on the same principal as the carbuator. The Canadian patent # is 2459368.

 

Sounds good and I agree but it cannot be used on natural draft gas boilers utilizing draft hoods sold in the USA. The USA code does not allow changing certified venting items which includes the draft hood. The draft hood cannot be altered in any way which includes shortened or extended. The damper must be after the draft hood. The size cannot be changed. Further more any vent termination supplied by the manufacturer cannot be changed or altered.

 

This draft regulator is not being made and therefore is not certified to be used on any appliance.I refered to it as i have made one and it seems to work very well. It delivers approxamitly 50f higher temperature to the base of the flue, the damper door with stands about -.08 flue pressure before regulator door opens when burner is off,therfore less air is exausted from room especially when used with an automatic vent block.The over fire pressure remains at it set pressure when chimmney pressure is high,not so with a standard regulator.

 

So what do you do with the draft hood?

 

My experance is with oil fired units , gas unit would have to be recertified the same as oil to be able to use them which is expensive so i am told.

 

This creates the second downfall. Oil products do not use vent dampers so we pull more air through the boiler as the chimney is warm. Best thing is just use outdoor air for combustion and draft regulator.

 

N.J.Trooper showed on 11-07-11 at 8.31 p.m. with a picture an add on damper for oil or gas . They were built so a certain manufactory could increase the A,F.U.E. of there units so they would qualify for the energy star rating.I have installed there oil fired units with damper.

 

Granted they are available but very few sold. The burners today restrict the airflow through the burners to keep the flow through the boiler to a minimum. I am not agaist your product but I am only trying to bring up the facts.

 

Maybe I'm not the sharpest knife in the drawer, but for the life of me I can't see how that thing can work as claimed.

The 'so-called venturi' appears to be nothing more than a 'hump' of sheet metal OBSTRUCTING the flow of the run on the tee.

In my mind all I see it doing is decreasing the draft in the boiler by obstructing the flow.

You are of course free to believe the Snake Oil Salesman if you wish.

Perhaps there is a reason it is not being made? I mean, just because something has a patent, does NOT mean that it's a good idea, or even practical.

Don't bother trying to explain it to me, you won't change my mind.

 

Thomas Edison and Henry Ford said they met people that had the same attitude when the saw something they could not under stand.

 

Yeah, well good for them... believe me, if it were understandable from the information presented in the patent documents, I would be able to understand it. Please don't insult my intelligence.

As I recall, there have been trillions of light bulbs, phonographs, automobiles produced since the 'naysayers' have had their nay say day.

I don't see any 'humps in the pipe' on the market. When I see trillions of these things produced, I'll eat my hat.

 

Hopefully a "Yankees" hat!!!! Probably overpaid for it anyway.

Mike NJ

 

Ford didn't invent anything that I know of, certainly not the automobile. For every Edison, there are hundreds, probably thousands, of erstwhile inventors with ideas and patents.

 

I don't understand enough about the venturi principal to say one way or the other..

Getting it listed, or even better.. packaged with a boiler would go a long way towards people adopting their use.

Seems the reduced passage way would be offset by increased velocity.. but again I don't claim to understand it.

 

Here is the link to the patent (you need to search around to get all the info): http://brevets-patents.ic.gc.ca/opic...=number_search EDIT: the link doesn't work, but you can Google Canadian Patent Office, and search using the patent number:
2459368

To the extent there is a significant venturi effect across the vertical leg connected to a conventional barometric damper, then Yes, the damper would open more. That would increase injected ambient air flow up the flue while reducing boiler draft. Couldn't the same be accomplished by just adjusting the counterweight on a conventional Field barometric damper?

But back to the venturi effect - normally a venturi has a necked-down throat that produces the suction in the region of increase flow velocity. But, in any case, the venturi suction can be calculated from basic fluid-flow principles (but don't ask me to do it).

Actually, my 60-year-old Field barometric damper is installed off a tee from the main flue ducting - and perhaps most installations are like that (not sure how else they would be installed). It's the same as the idea of this patent.

I notice that this patent is 7 years old.

 

I really did not say this regulator would replace the field control. I only put it out there as there are deficiencies in the standard control and this one uses a completely different science to do the same job and maybe do it better and save oil while doing it.Are we not all looking for way to save fuel? Makes a person think.

 

speaking of regs,few days ago stuck another wt. on mine,now theirs two,cause don't remember seeing it move in awhile.now it opens and closes with my breath.didn't check with my kit nearby either.am i bad?

 

Not using your draft gauge when adjusting the over fire pressure makes you bad tech. Just kidding.

 

For not using the standardized rules of Americanized English, yes, you ARE bad!

 

If anyone wants a better draft regulator i have a better one than this one.

 

If not approved by the manufacturer it cannot be installed.

 

Venturi effect - Wikipedia, the free encyclopedia

The pressure at "1" is higher than at "2", and the fluid speed at "1" is lower than at "2", because the cross-sectional area at "1" is greater than at "2".

 

saves has a point here, how many ideas make it to the patent office?? and if you understand physics, the Venturi effect can be caused by any flow with differential pressures...