hello,

I am new to the site and wondered if someone could answer my question. I have an old house with hot water heat and radiators. I am remodeling the bathroom and would like to add radiant floor heating. I have the existing flooring removed and the joist space exposed. My existing hot water system is a one zone sytem with a 175000 BTU Well-McLain boiler. There is a temp gauge that is on the side of the boiler and it appears the water temp gets in the neighborhood of 110 deg. I am considering installing the Wirsbo quik trak and was looking for input.

Thanks,
Kris

Does your Weil vent in metal pipe, or PVC? If it vents in metal, and you are only running 110* then it is going to most likely rot itself to death.

In other words, is it standard efficiency or high efficiency?

One zone with a boiler that size?

Sweet lord, that's either one huge zone, one extremely poorly insulated zone, or one heavily oversized boiler.

And Guest's concerns are big as well.

------------------
Northeast Radiant Technology, LLC
-=RFH Design, Supply and Consultation=-
RPA certified Radiant Designer
http://www.NRTradiant.com
rob@NRTradiant.com

It is a masonry chimney from 1933. I am unsure whether it has a liner pipe.

I assume from your responses that I first need to get the water temp issue resolved and then look at how to make the radiant floor work. Is the WIRSBO quik trak a good product. Their website is pretty lean on information

Well it sounds like you have a cast iron boiler. With that said, you need 130*-140* water returning to the boiler to keep the flue gases from condensing. Are you sure you didn't look at the gauge when it was between cycles?

With that said it's an easy fix. Turn up your aquastat. You'll need some sort of mixing (I recommend V.S. injection) to blend down your future infloor zone(s).

Rob's right, you could heat a large home (4,000-5,000 sq ft) with your boiler.

Now to your question, lol. If your talking about the product that Wirsbo buys from Stadler-Viega, yeah it works pretty good. Reading posts on here though I think some people believe there are better products.

More information...
Weil Mclain CG Series 12 High Efficiency Boiler

Does this change anything?

CG is a standard cast iron boiler. 81-83%. Some people actually call anything with a spark ign on it "high efficiency". Your boiler is fine to use for radiant, but you need to protect it by insuring the water temps are coming back at 130-140*. There are several mixing stradegies, and we don't all agree on which is best, but they all work.