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Joined on February 27, 2010

Last Post on September 1, 2014

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@ April 13, 2010 6:35 PM in Ideas for a Frozen hot water loop

How much of the 45 feet of baseboard is actual element, with fins on it? He put a spirovent on the loop piping? What temperature did you run the loop at last winter to keep it from freezing?

Does it make more sense...

@ April 9, 2010 10:19 PM in expansion tanks size by water volume and not btuh rating. I mean...water is going to be hot when it's hot. The tank shouldn't care how fast it gets hot.

Here a some helpful links.

Maybe we'll eventually get a good formula to work with. 


@ April 3, 2010 10:56 AM in Uh oh......

Grab a check. Pay to the order of Africa, Europe and Middle East!


@ April 3, 2010 8:00 AM in Is EDR everything?

You're right about not just needing to heat up the radiators. You also need to heat the pipes in the system feeding the radiators. You can go by a rule of thumb by adding 33% to your total EDR (for residential systems), or you can probably find the BTUH output of the pipe and add that all up, though that seems very tedious.

You figured the boiler to need 1.5 hours to heat up all the system piping? How did you come up with that? In a typical residential home, with properly sized and working vents, you should feel the piping and radiators getting hot within minutes.


@ April 2, 2010 7:08 AM in The End of the Season Blues



@ April 1, 2010 8:27 PM in Now I'm really worried!

The author of that article forgot to mention that you need to test the water at 180 degrees to get true readings.


@ March 31, 2010 8:08 PM in zone valves

1 1/4 is good for 14 gpm, which is about 140,000 BTUH.

The CV rating is how many gpm you need to pass through a fitting to cause a 1 psi pressure drop.

Steam Humidifiers.

@ March 31, 2010 5:59 AM in Hot Forced Air - stale air / dry mouth

I've had really bad experiences with the Honeywell TruSteam. They need to be cleaned almost every week. And they require a dedicated 15-20 amp circuit.

You should be able to make your system work. It just needs to be installed correctly.


@ March 30, 2010 9:50 PM in Triple acting relay

Blue wire removed as shown with red box in picture.

Follow the wires now and you'll see that everything works the way it should in a high limit aquastat.


@ March 30, 2010 9:39 PM in Amp draw

Should work the same way.


@ March 30, 2010 9:33 PM in 2 over-sized boiler questions

...if you're just going to replace the boiler for better resale, I wouldn't go crazy with a high efficiency boiler.

1 Therm = 100,000 BTU

Maybe you can use that to figure how much you would be saving.

No question.

@ March 30, 2010 8:48 PM in 2 over-sized boiler questions

You would be saving with a new boiler. How much? Who knows? But you would be cutting down on your gas usage. Have you had a combustion test to check efficiency?

To top it all off.

@ March 30, 2010 7:40 PM in Water feed location.

I had to go back to this job today because I left the Taco zone valves in the manual On position when I was purging. I can try as hard as you want to be a good student of heating, and all it takes is one little lever to knock you right back down a notch.

I have the same Aquastat.

@ March 30, 2010 7:32 PM in Triple acting relay

Disconnect the blue wire going to terminal B right next to the Differential dial. It's just a stake-on connector that you can pull off. Don't cut any wires.

Forgot to ask.

@ March 30, 2010 7:17 PM in 2 over-sized boiler questions

Did you add a pick-up factor to the total radiation load? Usually add 33%. Some guys add as much as 50% if you have a lot of piping in the system, especially uninsulated. If your main concern is efficiency, you can install a boiler with less input BTUH, that runs at a higher efficiency.

Are you having any problems with the system? Are you just figuring out if anything could be done to be more efficient?

Just whistle.

@ March 30, 2010 6:23 AM in Leak Detection

Pump down the system, if you can, and leak test with nitrogen. About 400 psi will make the leaks start hissing. If you still don't hear anything, the leak might be in the condenser or from the schrader valves if you have 'em, which you can check by disconnecting your hoses.


@ March 30, 2010 6:18 AM in Mills 350 Steam Boiler

Depends what make...

@ March 30, 2010 5:59 AM in Triple acting relay

 I have a Honeywell Triple Acting Relay. I found the lead wire for the low limit setting and disconnected it (simple spade connector). If you find the wiring schematics, you can find the right wire, or post a model number for the relay and we'll find something.


@ March 30, 2010 5:56 AM in 2 over-sized boiler questions

Your boiler rating of 168K is for input or output BTUH? You need a boiler whose output rating matches your connected load. So maybe you're not 50% oversized...maybe you're only 50% efficient.

Wrong Location.

@ March 30, 2010 5:51 AM in Hot Forced Air - stale air / dry mouth

First floor humidistat is in the wrong location. Right now it is downstream of the humidifier. That means it will satisfy as soon as the furnace blower comes on. You need to have it moved to the return. Personally, I always put the humidifier on the return, and the humidistat as far upstream on the return as possible, while still sensing every return in the house. Usually, that means, the humidifier is about chest high, and the humidistat is a good foot higher.

Second floor humidifier is in a closet? And the duct run for it goes to the return ceiling box? That seems kind of sketchy. But the installers also didn't make a return plenum on the furnace so it would be hard to run that supply duct to there.

When you look at your system, try to think about where the humidity wants to go, and where the humidistat is sensing the air.

How was the boiler sized?

@ March 29, 2010 7:53 PM in 2 over-sized boiler questions

Did you measure all of your radiators? How did you come to the conclusion that your boiler is oversized?

I would personally keep steam temperatures constant throughout the day. I like to keep all of those pipes and radiators from getting too cold when the boiler first cycles on.

Boiler specs.

@ March 29, 2010 7:50 PM in my radiators sound like the wind!

How many BTUH output is the boiler? Do you have pictures of the near boiler piping? Can you get pictures of the problem radiators, count the columns and take measurements of width, height, and depth? Can you also see where the troubled radiator supply pipes take off of the steam main? Do they stay the same size the whole way, or are the radiator valves a smaller size than the pipe closest to the main?
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