exhaust adapter

[Pennkne]

I have a monitor 441 installed in my home that I am replacing with a monitor 422( loaned from a relative) until my 441 is running again. The exhaust height on the rear of the heaters are different by about 3 inches with the 422 needing to be adapted for my use and I can not drill another exhaust opening for temporary use. Is there a part that would lower the exhaust on the 422 so that I am able to safely use it in my current flue opening? I have been reading the forum and checking online and cant seem to find the answer to my dilemma.
I have the exhaust flue for each heater, both have the "curvy" exhaust pipe, not the shorter straight pipe if that helps.
Thank you for any advice

[machinist]

Hi Pennkne! Welcome to the forum.

It sounds like you're doing a great job figuring out how to adapt the Monitor 422 to your setup temporarily. Since the exhaust height difference is about 3 inches, you might need a custom exhaust pipe adapter or an adjustable elbow to make it align with your current flue opening without drilling another hole. These kinds of adapters aren’t always easy to find, but you might have luck at a local HVAC supply store or by contacting a Monitor heater service technician. It’s great that you’ve got the "curvy" exhaust pipes, as they can sometimes give a bit more flexibility.

That said, I’d recommend holding off until hawkins111 comes online. He’s super knowledgeable and might know of a specific part or workaround that’s perfect for your situation.

[Pennkne]

Thank you and Thank you for your response as well. I will wait as you suggested.

[hawkins111]

Pennkne,

You can get parts for your Monitor from Hickory Home and Gardens off Ebay. They have more parts than anyone else. There are several exhaust parts to give you more length on the exhaust. It could be as simple as drilling a new hole for the fuel line and using the exsisting flue pipe.

Tom

[hawkins111]

https://www.ebay.com/itm/223173702223?_skw=Monitor+heater+parts%2C+exhaust&epid=22018504462&itmmeta=01JFFYC6JJW0FYW5D7PABGRVGP&hash=item33f630724f:g:3z4AAOSwdVFaxVg~&itmprp=enc%3AAQAJAAAA4HoV3kP08IDx%2BKZ9MfhVJKkVIVbdFYXBaOdhKRreJ%2FA4tWPiTEZZXbduX%2B5EO6qmLV99yUpdoVvKN0tJXjCgPy88zdUPy2bgHDgqs8feieCqMX4Z8I7AoYkWLNZOlEc0TzgjIhW2IwajOEejGd0zsnlICc1%2F55RkwHAjnql8Mgm%2FpuWW5sy1hx8bwTGn0Kka6U1pMGWwS3c%2FePK7pT2K8nMyfgO1ynrxNDVjwhxVjXAgHs%2B3t2iSoJtyMN6k6pS3B0fq9WST%2B3ZZcedKBXmck%2BgtJELfT5NjCjiHVOHIvvuN%7Ctkp%3ABk9SR7TpsP77ZA

[Pennkne]

Thank you for answering my question and please forgive my ignorance, but do I need only the elbow from this kit and can you tell me please how to make the turn from the elbow into the flue?

[hawkins111]

Pennkne,

https://www.ebay.com/itm/316018183988?_skw=Monitor+heater+parts%2C+exhaust&itmmeta=01JFKGT4W860RBDFPGPCQ2APFD&hash=item499426cf34:g:b7cAAOSwJG5nTP-d&itmprp=enc%3AAQAJAAAA4HoV3kP08IDx%2BKZ9MfhVJKlwkCMGCdYH1rbZzhbWsJgbHh1i9%2BvH%2BV9qb8CoPsY%2FCfsS%2BCQAnjyZm0aqxkc59v%2BN5JgaxGhz2AzriZn8gK%2FPqM1r%2BuDbuFc0LZYzLI%2BO9W9Pg928mpSLtDW4729ZXNoClHchce9ggPi2UYNR5pwVzljwNR2TfJzyXe6febi8dzmbDzQnTnIgm6wadB1UVcf%2B0HfS3kUXqLD%2Bd4fS2cvnuA0jms4j1bfS%2B3OchSIoE9YIx35ugGq7gxjl6CqIZvAQwBpbo79slQG5SQlz6MGu%7Ctkp%3ABk9SR6DO6PD8ZA

This part is the only extension for the flue that Monitor made. It is about 8 1/2 inches off set. It does appear that it is the bent pipe included with the short extension kit. Monitor never made very many different exhaust pieces to help make this transition.

It has been a long time since I did any exhaust flue work a Monitor. I do remember it was a bear to change from a M441 to a M422, particularly if you were trying to use the existing fuel line. In most cases the fuel line had to be changed. In some cases two bent pipes had to be used to make it line up. One 90 coming out of the stove and one more to hook up to the center of the flue pipe, not the 90 degree port. In those days (1998) there were no flexible fuel lines available, so you had to work with copper tube.

I have been running a M441 since I was a dealer in 1996. Same heater, that I have overhauled 5 or 6 times. Some years back I fitted a Toyo exhaust to it, because the Monitor flue pipe air inlet is too small for our extreme cold temperatures. The inlet would get frost build up and shut down the heater due to no air. The Toyo air opening is much bigger. You will not like the price of this retrofit!

Back to your problem! The M441 exhaust duct center is 12 inches from the left side and 8 up. The 422 is 9 inches from the left and 11 inches up. Both have different locations for the fuel line. It's easy enough to make the flue line up by moving the stove left or right enough to make the transition. The stove may have to be put on a stand to make up the height difference. The flue pipe may have to be loosened up to make it turn. This solves the flue, but now you have the fuel line to worry about. I don't like flexible fuel lines, but temporarily they may have to do. Do not use teflon tape on the fitting. If you use anything, use a gasket maker glue that is fuel compatible. Remember, the seal is made by compression, not the threads.

I hope this helps you out? May I ask, what is the hold up on overhauling the M441? A good shop should be able to do it in a day or so.

Tom

[Pennkne]

Thank You for sharing this information. I appreciate it. I hope to get the 441 running again eventually. The outside filter has been changed, the fuel is good, it is coming in to the rear of the heater and into the fuel sump. I have checked the fuel strainer/ filter inside the heater, kept the fuel that drained out in a glass jar with a lid to check for water or contaminates, there doesn't seem to be anything there other than kerosene. When I attempt to start the heater, the "combustion fan"? starts, the ignitor cap gets warm to the touch not super hot but warm, there is a little bit of warmth at the bottom of the heat exchanger, it doesnt get hot enough for the circulation fan to start, then the burner status lights all flash, eventually the combustion fan stops.