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[RSI]

Is 6gpm the most it will do on fixed speed high? That would mean it is 12' of head pressure. The 009 will only do about 7.5 gpm at 12' of head but you will probably only get about 7gpm because the head pressure will increase with more flow.

[Ridgekid]

Marty.  45 watts is max.  So I basically was running it all out. 

[Scott7m]

If you want a better pump look at the bell and gosset pumps ridge kid, there not water lubricated and from what I can gather there top notch.  I seen some today in an hospital and that's usually a sign there a great pump.  Rsi uses one of these models

[RSI]

Yeah, I use the PL36 model. It is a lot bigger pump than the 009 though. It will flow about 3 times as much water and probably use about 160 watts on your setup.

They make a PL30 but I can't get them for a decent price. It would flow probably over 1-1/2 times as much as the 009 and use around 100 watts I am guessing. (never used one so don't have actual watts numbers for it)

[Scott7m]

I'm definitely seeing where that design has it's advantages!  They are much more efficient and don't have to worry about your water being a lubricant

[newmanab]

Sorry to hijack thread but i have a question along the same lines.

Getting ready to hookup radiant floor pole barn in the next month,   My run is 15 feet from owb and 3 runs of 300 feet pex 1/2" tubbing. Looking @ the drawing on cb's website they use (2) taco 007 pumps(1 on the owb and 1 on the water to water heat exchanger thermostatically controlled).  However i really like the thought of energy savings of the grundfos.

  Any thoughts or comments would be greatly appreciated!

Thanks newmanab

[willieG]

your loop of 300 feet of 1/2 pex will give you around 10 feet of head  i am only guessing that you will need 3 to 5 gpm perhaps others hear can tell you how fast you need to deliver your water to the floor i have been told you should move the water fast wnough to keep your in and out temps of the floor loops to about 10 or 12 degrees max i have one loop in my small basement of about 250 feet and have a three speed grundfos on it and run it in low speed to maintain a ten degree drop

[MTJAG]

I run four of the Grundfos Alphas (three in my house radiant plumbing and one at my OWB).  The ones in the house are all set to AutoAdapt and run at various speeds, from 2gpm to 7gpm.  I have eight runs of 1/2" pex in the floor on the first floor and eight runs in the second floor with each run being 128' each. I replaced the original Taco pumps because they were using too much electricity, since I am off grid solar.  The Grundfos pumps use less than 1/3 of the of the original Taco pumps combined.

I have set the pump on the OWB at the highest constant pressure and it runs at 38-40 watts and 4-5gpm.  My OWB pumps runs year round, and during the summer when my boiler is shut down, I turn it to AutoAdapt and just let it run.

I hope that helps some.  For me, being off grid solar, it's the only way to go.

[newmanab]

Mtjag and Willieg thanks for the great info. I believe thats the route i'm Going to go i'm trying to lower my energy usage.  I'm still not sure how you guys are using areound 1000kwH .  The last month for me was 1600khw, But that sure beats when i was heating with electric.  Average with taxes $.096/kwh

[willieG]

my home is power hog too..i use about the same as you monthly

[Scott7m]

My home is 2300 sq ft, 4 ppl in the home and I use around 750khw in the winter months...   Our rate is 13.2 cents/kwh

[willieG]

electricity is teh only "service " i have..no gas no propane or anything also my in gorund water stove (that i use the blower from to heat my home) is a one horse motor not some puny 1/2 horse (wish it was) i am also on well water so i have to pay to run the pump for that. we tend to leave lights on when we shouldn't too..we are trying to be better conservers but we are not very good at it yet

[MattyNH]

 Just got my electric bill the other day..used 575 KWH .1800 sq ft house.. Bill $105.26

[newmanab]

Just got my electric bill the other day..used 575 KWH .1800 sq ft house.. Bill $105.26

That is impressive.....