Best Of
Re: Setting up the air to fuel ratio High for Low Fire Your thoughts
@Scott Secor at least you got in the kitchen. I had to change in the garage. I can't remember the last time I worked on one or ripped out my last one. They were still running in 1980 but by the 90s I think they were pretty much gone gone, but I wasn't doing much burner work then. When I started in the early 70s everything was mostly #4 oil as far as schools etc. Even small elementary schools were #4 with a 20 gph burner. That gradually changed and the early-mid 80s was just crazy with oil to gas or gas oil conversions.
Re: Identifying Mystery WM Boiler
Before Weil McLain started to archive their discontinued boilers online, (back to the 1960s) there was a series of coal fired boilers that were marketed as oil fired boilers after 1946. You could still purchase the model 57 or 67 boilers as hand fired boilers with the big front doors for the coal shovel to fit into the fire box. But the demand for oil heat was increasing in the late 1940 and through the 1950s. Many manufacturers were not able to retool to make oil fired boilers so they made some modifications so the existing designs were fuel oil compatible. Here is an example of such a boiler with the addition of a vestibule to cover the oil burner and the fire and cleanout doors to give the appearance of a modern 1950’s appliance.
This Weil McLain No.57 boiler was clearly a dry base boiler made to be placed on a base that formed the ash pit for the hand fired models. I would place the manufacturer date between 1940 and 1954. Your barge mounted boiler sections are from the same era and were most likely the next size larger (Perhaps the No. 67)
Re: Makeup water causing boiler failure due to thermal shock
Interesting analogy, have you done any testing ? Maybe she did not do anything too crazy with it.
Re: Heat loss
For existing structure, the quickest and most accurate heat load is from fuel use. Older houses have too many unknows for any Man J type of calculation to be accurate. In case of fuel use about the only error is boiler efficiency, DHW loads and passive solar gains.
The math is pretty straight forward:
https://www.greenbuildingadvisor.com/article/replacing-a-furnace-or-boiler
If you want even quicker, in zone 5,6, winter fuel use in Therms X 42 is about your heat loss. So if you burn 1000Therms of gas, your heat loss is around 42000BTU.
Kaos
Re: What kind of baseboard radiator is this?
This company make that type of heater, along with a few other companies.
Re: What kind of baseboard radiator is this?
I have had decent luck ordering suitable replacement convector guts from mestek/beacon morris, usually not an exact 1:1 but I have had luck getting something in there that fits and is of comparable capacity
Re: Getting rid of the old boiler sections
2400 lbs! We specifically dropped off the boiler by itself. Two trips. The front section was 700 lbs
$168 for all that work😫
GW
Re: Struggling with MHK2 thermostat install on Mitsubishi Minisplits
Thanks guys. I definitely misread some of the compatibility charts and also wrongly trusted AI about how my system operates with the MHK2 and the Kumo wifi adapter (Ive also added the wifi adapters on my systems). It doesn't help that this also came at a time not to long after they rolled out the comfort app, which appears to have less functionality than the old Kumo app (and all guides/resources still reference the Kumo app). The short of it is, I wasted a lot of time hunting around for advanced settings that my system is not meant to display in the comfort app nor on the MHK2 thermostat. ugh!
Shortly after my post, I ended up getting a response to an email I sent Mitsubishi support. They said my unit has a physical jumper, not function codes/advanced settings in the app or on the MHK2 (which is what you both suggested). I then found Application Note 3048 that Kaos linked above, which confirms it — for my unit you have to cut the jumper to stop the fan.
Thanks for the help all.
Re: What To Look For When Replacing a Natural Gas Boiler
I can ask around for contractors in SW Idaho. Our Idaho Caleffi rep is a born and raised Idaho gal located near Idaho Falls.
She was a Ferguson branch manager for years, she will know the players in the area.
I know some of the big hydronic knowledgable shops are opening remote branches around the west. Usually around money, resort towns :)
Let me know or PM me the town you are near.
A small wall hung would clean up that room.
hot_rod
Re: Main air vent location
Yup. That's the longest but there are 3 more that are each just under 200'.





