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Joined on December 29, 2008

Last Post on August 23, 2014

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Thanks Dan

@ December 23, 2009 1:35 PM in Still hate a lot about this new wall


I for one appreciate your willing to listening and implementing our suggestions. Happy holidays to you and your family.

Glad to Be of Help

@ December 23, 2009 10:27 AM in Design a simple system

Make sure you do that heat loss and make sure you use the manfactures correction factors when sizing. Some only give you the 160 degree water rating.


@ December 23, 2009 6:29 AM in Munchkin Contender Heat Exchanger

If this is normal and the gaps are gone between each coil in the exchanger where does the condensate go?


@ December 23, 2009 6:09 AM in Design a simple system

Just designed a job this way. Used a mon-con. We used a Wirsbo True Flow 7 Loop radiant manifold supply 7 integral panel rads. No thermostat! There's a nice diagram in the attached on page 19. Take a read.

Radiant Heat Loss and Design

@ December 22, 2009 6:39 PM in radiant heat (temp reduction)

All the anwsers to your questions are found in your radiant heat loss and design. If you don't have one I would suggest you get one. The type of radiant application also applies. Is this a slab on grade? Is this joist heating with plates? Joist heating without plates? What is the R-value of the carpet pad? What is the R-value of the carpet? If you would like a professional anwser then you must be able to anwser these questions. Yes, you must use some type of mixing valve or injection pump and the answe to your " am I worried to much?" Yes if you don't have a loss or design.

Is that relay a Zone Valve Relay

@ December 22, 2009 6:29 PM in radiant help

If your using a zone valve relay the circulator needs to be wired as a system pump. The end switch from the control is wired to TT at the boiler. I believe on an Argo Zone relay there are 2 sets of ends switchs.  You should be able to use end switch 2 to power a pump. End switch 1 goes to TT on the boiler.  Go to Argo Industries web site. I'm sure there is a manual there.

Knowledge is Power

@ December 22, 2009 6:14 PM in When is Delta T for heating not a true Delta T??

Mark I  enjot reading your posts. What makes this site great to me is the education you find in each post. I have been in the industry since 1989. So of consider this back in the day. Back then most supply houses were owned by mon and pop. There was always something educational going on. With corporations buying up these type of supply houses the of education you can get just from reading the posts here is priceless. Keep up the great work.

This was brought In

@ December 22, 2009 4:00 PM in Munchkin Contender Heat Exchanger

An thrown on my counter this morning by a contractor. Looks like it was dry fired a few times by the twisting. I'm thinking that the condensate had no where to run. It leaked onto the control and fried that also. Sending it back to Munchkin..I'll let you know what they think.

Munchkin Contender Heat Exchanger

@ December 22, 2009 7:29 AM in Munchkin Contender Heat Exchanger

The attached pics are from a MC-80 installed 2 yrs ago. That heat exchager took a beating. Took the pics this morning.

Keep Up The Great Work Mark

@ December 22, 2009 6:09 AM in When is Delta T for heating not a true Delta T??

I enjoy your posts. Keeps the mind fresh. I was stumped on this one. Keep up the great work.

You Need

@ December 21, 2009 9:53 AM in New room radiant heat

a  system pump after the mixing vlave for the radiant. What size. Generally a Taco 007 or Grundfos 15-58 but pump sizing is dependent on heat loss, flow rates and head of the system. Without knowing these parameters, your rolling the dice.

I''ll have to think

@ December 21, 2009 7:46 AM in When is Delta T for heating not a true Delta T??

this out throughout the day. I'll get you an anwser tonight. Buys day today..Alot of no heats.

I'll Give It a try

@ December 20, 2009 7:59 PM in When is Delta T for heating not a true Delta T??

I have a questions first. What time value are you stamping on that room side temp?
Ti-To divided by R-Value = Heat Loss of an outside panel
Ti = Temp Indoor
T0= Temp Outdoor
I would have to have a R-value that exceeds Ti in order to have no loss at all. But I'll bite and say. For under 15 minutes a 2.77 for 3 minutes a .55

Hail Mary

@ December 20, 2009 7:36 PM in snow melt

I would take Mark up  on his willing to help you out of a big jam. Your sitting on the 50 with 1 second left. If I'm thinking correctly Mark is going to tell you how to stretch that delta-t to get some btu's out of that melt.

What Does High Efficiency Hydronics Mean?

@ December 20, 2009 6:42 PM in What Does High Efficiency Hydronics Mean?

I came across this nice article Hot Rod published back in 08
Was curious to hear what the regular posters thoughts are? Hot Road makes some great points in the article.

My thoughts.

High efficiency hydronics starts with a heat loss, piping, control and design strategy that in the case of replacement system lowers fuel consumption by 20 percent or more. In the case of new construction the heating equipment if oil must be a minimum of 87% AFUE and gas 90%. My feeling is that no piece of heating equipment that is any less is not even in the equation.

One of the Rules

@ December 20, 2009 5:49 PM in Misguided person

Is not to discuss politics. I respect those rules so I have to forgive my  full rebuttal. I will say, what happend on 9/11 was a tragedy for American but across the world was no different then the bombing of embassys or the bombing of market places in other parts of the world. What Madoff did had an impact on individuals, charity's, businesses and governments across the world.

Was 9/11 News

@ December 20, 2009 4:22 PM in Misguided person

To me that wasn't news. We all lived every second of it. It was a historic time in our lives. An event that will never be forgotten. To me  news is something that we all are not aware of. The biggest news of the decade to me was Madoff. The impact of what he did had an impact on more lives ten fold. It had such an impact on our economy that it's effect is still being felt today. Yes, the 9/11 victims families will never forget and neither will I but my vote goes to the Madoff scam.

Terry, KBH

@ December 20, 2009 3:21 PM in Taco VDT Pump

Try this to get a hold of John [email protected] I recevied an e-mail from his this morning concerning this issue. They are aware of a problem and believe they have it fixed. I'm sure he would like to know the application and would want the pump back

Welcome to the Site

@ December 20, 2009 3:13 PM in New to boilers - what do I do?

Normal operation would not have the water set to 140 degrees. This would mean that you return water temp would be 120 degrees which is not good for a cast iron boiler. Minimum return temp should be 140 not the supply temp. As far as your feed goes. We do not have to feed hot water boilers any longer. The feed valves today make sure that the system maintains the 12PSI it is suppose to be operating at automatically. Check the brand and model number of that feed valve and make sure it is a Watts S1156 or B&G FB38. These are the most common.


@ December 20, 2009 1:46 PM in Taco VDT Pump

Did you send the pump back. I recevied an e-mail from John Barba and I'm sure he would like to hear the application. You should give him a call at Taco or send him an e-mail via Taco's site. He is interested in what the problem is.

Here's Taco Wiring Guide

@ December 20, 2009 11:12 AM in Modine and Taco

The attached wiring guide has what you are looking for.

Noticed a Note on that schematic

@ December 20, 2009 10:47 AM in Control ZV - What Tells the Boiler to Come On

States that you must maintain 100 gallons per hr flow rate? Equates to minimum flow rate of 1.7 GPM. If any of those zones are less than 17,000 btus (based on a a 20 degree delta-t) I would make sure I use a low loss header/hydro seperator. I'm not a fan of primary/secondary with a mod con.