Grundfos Replacement UPS3 V Alpha 1

[JS1]

I had a new boiler, cylinder and UPS3 15 50/65 pump fitted last year.

The plumbers left the pump on constant curve III, which according to the pump curves takes up to 60W. I changed to constant curve I which according to the pump curves takes up to 28W, saving about 32 W. I do not know how many hours my pump runs but assuming 3,000 hours/year, with electricity at 37.653 p/kWh from April, the saving could be about £36 per year or potentially £360 if the pump lasts 10 years.

The electricity consumed by the pump isn’t entirely wasted because it will contribute to heating although the price of electricity is about 5 times that of gas.

I have no idea what pump setting you would need. My boiler is 15 kW and needs only about 655 l/h for a 20 K ΔT. If you need a higher setting the savings will be less, if any, with the UPS3 15 50/65.

The Screwfix prices are £119.98 for the UPS3 15-50/65 and £131.49 for the ALPHA 1 15-50/60. According to the pump curves the ALPHA1 15-50/60 130 takes a maximum of 34 W compared to a maximum of 60 W for the UPS3. After 1,200 running hours the ALPHA1 could have saved the price difference of £11.51.

I doubt that the DHW cylinder pump running hours are sufficient to make upgrade worthwhile.

This is just my opinion.

Thanks for taking the time to respond. The info is all useful in developing a better understanding about how energy is consumed.

 

[JS1]

Are all your lights energy saving / led js1 ?

Thanks and yes; I switched virtually all the old halogen out last year.

 

[ShaunCorbs]

Can you improve your insulation?

 

[JS1]

Can you improve your insulation?

Thanks. Its a SIPS panel house with a SIPS roof so already very well insulated. We also have a MHRVS but I'm uncertain of the benefits that brings from an energy efficiency point of view.

I need to do a bit more head-scratching on the heating system as I'm still puzzled as to how it can routinely consumer circa 2.5-3.5Kwh per day (Nov - Feb).

 

[Jojomacjo]

If you're looking for savings I'd recommend dab pumps I have moved away from Grundfoss myself they are no what they once were details are below , other savings can be made from adding more controls insulating your property replacing light bulbs for LEDs. Kop

Hmm DAB is a Grundfos company......