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Horse power is a unit of power, with one horse power equalling 745.7 watts.
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Grundfos is proud to introduce the next generation of
energy efficient circulators - the Grundfos ALPHA.
By incorporating a permanent magnet motor design,
power consumption is now reduced by 50%. The
Grundfos ALPHA adapts to the variable demands of
the system without sacrificing comfort. Using the
AUTOADAPT feature, the Grundfos ALPHA will analyze
the system and adjust to meet your heating demands.
(based on 14 reviews)
of respondents would recommend this to a friend.
Most Liked Positive Review
Easy to install, easy to operate
I am a super at a luxury coop on the upper east side of manhattan. One apartment on the ph floor was not getting sufficient cooling due to poor chill water circulation through the...Read complete review
I am a super at a luxury coop on the upper east side of manhattan. One apartment on the ph floor was not getting sufficient cooling due to poor chill water circulation through the convector unit in the apartment. I've installed pumps before but they effected the apartments below (no control over pump speed etc.) so they were removed. This pump allows me to dial the circulation in (it has 6 settings) so as not to affect other units in the building. The plumber installed it in a few hours, and it plugs directly into a 110 volt wall outlet.
Most Liked Negative Review
Ehh External control would make better
Simple, quite, and efficient are certainly all positive attributes of this pump. it would be better if it were possible to control speed via a control panel, external input, temperature control, delta-T...Read complete review
Simple, quite, and efficient are certainly all positive attributes of this pump. it would be better if it were possible to control speed via a control panel, external input, temperature control, delta-T control, or anything similar it would be a great pump. The auto mode does indeed work if you have multiple circuits connected to the pump that are opening or closing. however, if the pump is on a fixed circuit i give the auto mode low marks. picking a fixed flow or pressure gives more predictable results.
Reviewed by 14 customers
Displaying reviews 1-10
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from Long Island, NY
Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:
Put it on high to purge the lines after swapping out, then put it on autoadapt. 6watts in idle, 9-14 watts at 1gpm 1 zone. 12-16 watts at 2 gpm 2 zones. Couldnt ask for more
Bottom Line Yes, I would recommend this to a friend
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Alpha Pump for radiant heat
from Bryson City,NC
Had one on a 6 zone radiant floor heating system and found it was operating at the edge of its performance. It runs quietly, has options -3 speeds plus the self regulating feature which was ideal to balance the floor loops and zones. I am putting a pump in parallel to pick up a little flow when all 6 zones are on.
(1 of 1 customers found this review helpful)
Great replacement for Taco 007
By Off grid user
from Upstate New York
Easily replaced 007 circulaters between isolation flanges without having to re-plumb. Much quieter. As I'm "off grid" producing my own electricity with solar and wind, I'm stingy with every watt. The Alphas use less than a third (I measured both)than the 007 with the same GPM (I measured both).Delivery was actually one day sooner than "promised". Great pump - great service - competitive price.
from White Salmon WA
These pumps are great, I use them almost exclusively now. Set it on auto and it will match most any radiant load be it one small bath or the whole house. The GPM reading on the display is also an excelent troubleshooting feature, just one glance and you know there's flow. Oh, yeah they save about 60% on power consumption. The price has been coming down also. What else can I say, they rock!
By Reasonable Person
(1 of 2 customers found this review helpful)
ECM circulators are the way to go
This is a good ECM circulator offering three speed control and three pressure controls as well as their auto control. The average rating is when compared to other ECM pumps, not when compared to average circulators. I would have scored the pump 5 stars if it offered temperature control or an external analog speed control.
(0 of 1 customers found this review helpful)
Neat concept, love the digital display!
from Town of Ottawa, near Waukesha, WI
Hydronic circulator.Digital display, variable speed in auto mode, plus ramps up on demand.
Excellent and Efficient
from Newton, MA
I purchased the Grundfos Alpha to replace three circulator zones on my existing 20 year-old heating system, after living with it for two seasons. Not that our electrical bills are so high. They are, but you try to reduce where you can and the circulators were 20 years old, running a bit rough it seemed. I replaced the circulators with Taco Zone Sentry zone valves connected via a Taco ZVC controller. The Alpha installs like any other circulator except this one has a plug, which is perfect. (I set up my circulators to switched receptacles.)As the zone valves open and close, this remarkable circulator senses the energy consumption coorelated to circulator performance. When valves close, the circulator slows down. As they open, it speeds up. An integral meter tells you power consumption and, not yet tested, GPM.I have not used this under heating conditions, but rather just ran it cold to balance the system to get it ready for the coming heating season.Using a Kill-A-Watt meter, I verified the on-board meter and it checks out. The three circulators I replaced consumed about 65 Watts each while the Alpha draws about 15 Watts when fully ramped up with water at summer temperatures. When fired up, the power consumption should drop even further, slightly, due to lower viscosity of the water.At my electrical rates (about 18 cents per kWH), I expect to save 180 Watts per hour of operation. This may not sound like much, but over 2000 hours of heating use per year, the circulator will pay for itself in about a year and a half over a single, conventional circulator.
I love the readout and flexibility of this pump. Knowing the GPM and the power usage was very useful in setting up my wood boiler and gauging it's performance. I would like more information on the "adapt" setting that adjusts to system needs. What criteria does it use? The "adapt" setting tended to run too slow for my wood boiler. It likes a higher flow to keep the temperature more even in the boiler tank to prevent creasote formation so I'm using the a speed control setting.The first pump they sent was defective but PEX supply was very good at sending a replacement.
installs and works well
from Prior Lake, MN
I have a small house with modest heat loss.4 GPM max with <2' head - so this pump is a bit overkill.I just got the system fully running this weekend. The Alpha runs like magic:I had all 9 actuators closed and then opened one (.3GPM flow) and the pump saw the pressure drop and pumped against it properly.With all actuators operating, it ramped up/down fine.
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