ᐅ Replacement of Heating Pump / High-Efficiency Pump for Gas Heating System

Hello everyone, I am currently renovating our house. At the moment, I am wondering what should be updated or renewed for better energy efficiency.

We have a gas condensing boiler about 10 years old, underfloor heating in the basement, and radiators upstairs. There are 4 heating pumps from Wilo installed, plus one pump for solar thermal.

The pumps are functional, but according to the plumber, they are no longer up to date. He recommends the Evosta 3 pumps.

Is it worth investing in this? Is the replacement costly, and which pumps would you recommend?

These are currently installed:


Thanks and best regards

I'm just giving it another try... 🙂
I appreciate any help.

How much does the renovation cost?
How much electricity does it save?

RotorMotor schrieb:

What does the conversion cost?
How much electricity does it save?

There are two options:
I buy the pumps myself for about 100 euros and have them installed (MyHammer or a friend)
Or
The plumbing company installs them for about 300 euros per pump, but this cost may be eligible for funding.

According to my research, old pumps consume about 50 watts, new ones about 15 watts.

Then roughly calculate it. Saving 35W per pump over about 150 heating days a year results in 126 kWh annually. At 30 cents per kWh, that saves 38€ per year. After 5 years, you almost recoup the 200€ investment.

RotorMotor schrieb:

Then roughly calculate it. 35W saved per pump over about 150 heating days per year → 126kWh per year. At 30 cents per kWh, that’s €38 saved annually.
After 5 years, you almost recoup the €200 investment.

Can you tell me which new pumps I need to buy to replace my old ones?
Basically, what should I look for, model designation?
Thanks 🙂