Replace grundfos with lowara

[oxgman]

I’ve got an old grundfos 15-60 130 selectric that’s getting replaced as it’s on the fritz.

I have had lowara ecocirc pumps fitted for ufh on all 4 floors and think they are great.

I would like to replace the grundfos with a lowara ecocirc as well.

Would a 25-6 130 work in this case.

thanks in advance!

 

[JS1]

I’ve got an old grundfos 15-60 130 selectric that’s getting replaced as it’s on the fritz.

I have had lowara ecocirc pumps fitted for ufh on all 4 floors and think they are great.

I would like to replace the grundfos with a lowara ecocirc as well.

Would a 25-6 130 work in this case.

thanks in advance!

Did you make the change does the new pump use less energy, are you pleased with it? I have the 3 of same Grundfos pumps and looking for options to reduce the energy consumption of my installation. Tks

 

[John.g]

He should have changed by now.
You should save ~ 40watts (60-20) on each pump, so assume 15 hrs/day for say 8 months/annum is 40*15*8/12*365, say £146/annum maximum. Probably get your money back in 18 months or 2 years but if your old pumps are performing OK then debatable as the new type pumps will not last anyway near the same length of time as the old ones.
Any 25-6-130 pump should be OK.

 

[oxgman]

Did you make the change does the new pump use less energy, are you pleased with it? I have the 3 of same Grundfos pumps and looking for options to reduce the energy consumption of my installation. Tks

I did indeed swap out all my Grundfos for the ecocirc premium which are running anywhere from 7w to 20w which is a significant drop from the 60w originals.
I managed to find a few on Ebay that were unused for around £50 each so saved quite a bit.
I really can't say how much of a savings overall as we made quite a few other changes in the house moving from halogen to LED along with a few other changes but I am pretty happy.

 

[Deleted member 123817]

He should have changed by now.
You should save ~ 40watts (60-20) on each pump, so assume 15 hrs/day for say 8 months/annum is 40*15*8/12*365, say £146/annum maximum. Probably get your money back in 18 months or 2 years but if your old pumps are performing OK then debatable as the new type pumps will not last anyway near the same length of time as the old ones.
Any 25-6-130 pump should be OK.

Calls a bit out there, Savings - 146kwh around €30/annum.

 

[JS1]

Calls a bit out there, Savings - 146kwh around €30/annum.

Thanks all for the info and responses. I have a gas fuelled heating system which comprises UFH groundfloor, radiator 1st floor and gas/solar DHW. The boiler is a Vaillant ecoTec plus 637 with Vaillant cylinder and solar panels. The system has three Grundfos UPS 15-60 130 circulation pumps and a Grundfos bronze DHW circulation pump, the installation is 11 years old, the property is circa 4,500 sq feet. I've recently installed an Emporia electricity consumption monitoring system - How the Gen 2 Vue Energy Monitor Works - https://www.emporiaenergy.com/how-the-vue-energy-monitor-works. After several days of monitoring the heating/DHW system is consuming circa. 2Kwh per day and is the second/third highest ranked item on the monitoring list which has surprised me, although I have no knowledge of what the consumption should be this appears to be a huge amount of electricity to run the control system and circulation pumps. I’ve just powered the DHW and Rad pumps via a pair of Maxcio Power Meters which indicate that they run at 50W, I shall repeat the exercise on the UFH pump and the bronze pump with a view to doing some calculations on running costs and the break even point for any replacement pumps. The info is provided in case its useful to anyone, is anyone able to offer advice/real life experience of running the new generation energy saving pumps? Positive/genative experiences welcome with info on specific brands/models.

Thanks

 

[John.g]

Are the three (CH) circulating pumps just fixed (3) speed pumps and can you see what setting/speed each one is set to.

 

[JS1]

Are the three (CH) circulating pumps just fixed (3) speed pumps and can you see what setting/speed each one is set to.

Hi yes and yes. The DHW bronze pump is already set to 1. Thanks for the interest.

 

[John.g]

If the CH pumps are also set to 1 then ~ 25 watts saving in c/o to A rated ones, a long payback except present ones are really ancient.
I installed a A rated pump 3 years ago (out of interest mainly) and to obtain the greatest possible savings I bought one, (a 6M Wilo Yonos Pico) where you can incrementally change the CP (constant pressure) and the PP (proportional pressure) setting in 0.1M steps between 0.5M and 5.5M. Most other pumps give a choice of 2 or 3 CP & PP settings. most are quite adequate but the Grundfos PP settings are generally too low IMO. Also, most, but not all of these pumps display the power output and some like the DAB Evosta 3 display both the power output and the flow rate, I think some of the more expensive Grundfos do like wise.

My ancient Salmson consumed 45W and the Wilo between 22W and 14W depending on the TRVs positions, I have it set in PP mode at 4.4M.