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[slimjim]

You are starting to grasp it now!

[RSI]

Something you might want to consider when setting up your system is your electric cost. I have heard that some places in Canada it is really high. If it is where you are, I would use larger piping so you can use ECM pumps.

[mlappin]

Something you might want to consider when setting up your system is your electric cost. I have heard that some places in Canada it is really high. If it is where you are, I would use larger piping so you can use ECM pumps.

 

[schoppy]

That is the way I heat my 50x60x16 shed. Primary loop from the boiler to the shed which has a 40 plate heat exchanger feeding a 10 loop manifold. I switched to a Gundfus Alpha ECM pump and cut my electric usage for that pump by 75% and flow is excellent. I have antifreeze in the in floor system only just in case of problems.

[DaveB]

That is the way I heat my 50x60x16 shed. Primary loop from the boiler to the shed which has a 40 plate heat exchanger feeding a 10 loop manifold. I switched to a Gundfus Alpha ECM pump and cut my electric usage for that pump by 75% and flow is excellent. I have antifreeze in the in floor system only just in case of problems.

Thanks..my garage will only be 30x40x12. So, a 40 plate should do for me as well. Did you use the 1" MPT ? From what I can find a 40 plate is the smallest in the 1".
 What model of Grundfos did you use on the primary and the floor system ?

[DaveB]

Something you might want to consider when setting up your system is your electric cost. I have heard that some places in Canada it is really high. If it is where you are, I would use larger piping so you can use ECM pumps.

I would like to use ECM pumps. How do I determine what size pump I need ?
I know they are by GPM and Head but how do I figure that out ?

[slimjim]

Dave, really look at the plate exchangers, the more plates and larger plates give you more BTUs and require cleaning less often, they are so close in price that it's not worth cutting yourself short.

[mlappin]

Dave, really look at the plate exchangers, the more plates and larger plates give you more BTUs and require cleaning less often, they are so close in price that it's not worth cutting yourself short.

Kinda like building a garage or shop, go to small and you’ll regret it, least with the heat exchanger all you have to do is change it out for a bigger one, clean the too small one up then sell it on Ebay or Craigslist.

[schoppy]

My 40 plate is a 5"x12" with 1 1/4" mpt ports. The specs on it were way over sized for my need but I wanted the least flow restriction and like Slim said the cost isn't that much more for a larger one.

My in floor pump is the Grundfus Alpha ECM which has multiple settings and works just fine for my 10 loop manifold. My pumps on the back of the boiler are Bell and Gossett 3 speed pumps but I can't remember the model right now but are comparable to the 26-99. I am able to run my shed on medium and my house on low to save power and still get adequate gpm for my G200.

[mlappin]

Another way too save a little juice, look into the Delta T pumps from Taco. Uses two sensors, one on the supply and another on the return, then pump speed adjusts to keep the differential wherever you set it. I run one Delta T and one 26-99 on my G200, I’ll have to ask, but now wit the built in circulation pump on the G series two Delta T’s might be able to be used and still have sufficient flow.

[schoppy]

mlappin, do you know what pump they are using on the back of the G200 now and how many GPM it is supposed to be delivering? Do you have a picture of how that setup looks?

[mlappin]

mlappin, do you know what pump they are using on the back of the G200 now and how many GPM it is supposed to be delivering? Do you have a picture of how that setup looks?

Yep, have one hooked up and was running it less than a week ago. I’ll snap a picture tomorrow.

[slimjim]

It's the Grundfoss 15-58

[schoppy]

Thanks Slim, does that pump move enough gpm so just about any gpm in the other circuits will meet the total gpm requirement? I was wondering about shutting down one feed, say my shed and keep the house going in milder weather and still get DHW also.

[slimjim]

Yes, because of its pipe size and short distance it will move enough to keep the water temps balanced.