Table of contents:

Exchange of old circulation pumps
Exchange of old circulation pumps

Video: Exchange of old circulation pumps

Отличия серверных жестких дисков от десктопных
Video: Circulating Pump Basics - How a pump works HVAC heating pump working principle 2023, January
Anonim

The circulation pump is hidden as a small component in the heating system and is often overlooked when modernizing - it is the heart of the heating system and causes unnecessarily high electricity consumption in your household. An exchange of the power guzzler is therefore advisable.

Table of contents Table of contents Circulation pump: the heart of the heating system and secret power guzzler

  • What is a circulation pump?
  • Saving electricity by replacing a circulation pump
  • Installation and hydraulic balancing
  • Costs and funding for a new circulation pump

Table of contents Table of contents Circulation pump: the heart of the heating system and secret power guzzler

  • What is a circulation pump?
  • Saving electricity by replacing a circulation pump
  • Installation and hydraulic balancing
  • Costs and funding for a new circulation pump

What is a circulation pump?

A circulation pump or heating pump is a small component in the heating system with a great effect: it transports the heating water from the heat generator to the radiators and leads the cooled water back to the boiler. Older circulation pumps are often oversized and also send the same amount of water through the pipes when a thermostatic valve slows down the flow on the radiator. They work constantly - often even at full speed - and no longer adapt to the changing heat requirements of a house. Some older models offer manual adjustment options, but only a so-called regulated circulation pump adapts its performance to actual needs.

Saving electricity by replacing a circulation pump

When you hear the keyword saving electricity, you think of energy-saving lamps or the refrigerator with an A + certificate. But besides the electric cooker, the unregulated circulation pump turns out to be one of the biggest power guzzlers in the house. You only switch on a stove when you need it - the circulation pump in the boiler room rarely has a break in winter. In total, it has about 7, 000 operating hours - per heating period. And consumes an average of 500 to 600 kilowatt hours (kWh) per year.

In contrast, a high-efficiency pump adapts to the pressure conditions in the heating system and reduces its output when required. This also significantly reduces electricity consumption: high-efficiency pumps use 90 percent less electricity, which saves around 100 to 200 euros in electricity costs per year in a family home.

Good to know: Since modern heating pumps do not build up unnecessary pressure, flow noises or whistling valves are also a thing of the past after the replacement.

Installation and hydraulic balancing

When purchasing a new circulation pump, you should choose a model that is not labeled with an energy label from A to G, but instead has the ErP ready label. Particularly efficient circulation pumps have an energy efficiency index of less than 0.20.

Before installing a new heating pump, the installer should carry out a hydraulic adjustment of the heating. He often finds that a pump with a lower output is sufficient. The hydraulic balancing ensures that as much water flows through the pipe network as is actually needed, and that all components work in perfect harmony. This saves another 5 to 20 percent of energy.

Good to know: Modern gas heating systems already include the heating pump as part of the boiler. When replacing the heating, make sure that your new boiler contains a corresponding high-efficiency pump.

Costs and funding for a new circulation pump

The electronically controlled high-efficiency pump costs around 300 euros, its installation again around 120 euros. These expenses are amortized after just over four years. Anyone who has a hydraulic balance carried out by a specialist company can take advantage of KfW funding in the form of a grant. In addition, the BAFA subsidizes a pump replacement with 30 percent of the net costs.

Tip: Both the application to the KfW and the registration with the BAFA must be made before you replace the circulation pump - and both require installation by a specialist company. Many federal states and municipalities also reward the heating pump exchange with subsidies - it is worth asking here.

Eva Bolta Redaktion Haus.de

Popular by topic