Scenario A
Replacement of a hot water circulation pump in a multi-family building
Variable je nach GebäudegrößekWh
eligible kWh, accumulated over the measure's lifetime
Inputs: Länge der Zirkulationsleitungen oder Energiebezugsfläche
SFOE standard catalogue · Heating Technology · Version 2.0
Replacement of Hot Water Circulation Pumps in Buildings
The goal is to estimate the electricity savings triggered by replacing hot water circulation pumps in buildings with more efficient and smaller models.
Examples and Scenarios
What the measure delivers
5.0 Rp./kWh
Requirements
Only measures that meet the requirements of the Energy Ordinance (SR 730.01; EnV) can be credited. The additional requirements for the technical characteristics and for the implementation of the measure are set out in Table 1.
| Old system | New system | |
|---|---|---|
| Energy efficiency (according to EnEV) | - | Wet-rotor circulation pump with Q < 1.8 m³/h: EEI ≤ 18 Wet-rotor circulation pump with Q ≥ 1.8 m³/h: EEI ≤ 17 Water pump with motor: MEI ≥ 0.7 (with IE4 motor) Q = nominal flow rate |
| Sizing | - | The rated electrical power P1 of the new circulation pump must be sized to the standard heating load (and not the installed heat-generator capacity) of the group or building. |
| Thermal insulation | - | The heat-retaining parts must be provided with thermal insulation in accordance with clause 5.3 of SIA 385/1:2020. |
| Implementation | The replacement and commissioning of the new system must be carried out by a qualified specialist or company. | |
| Disposal | The consumption-relevant components of the old devices may not continue to be operated within Switzerland. Proper disposal or export must be demonstrable on request. | |
Proof of compliance
Compliance with the requirements must be demonstrated by the following documents. The documents listed in Table 2 are an integral part of the proof of measure implementation.
- 1.Explanation (PDF format, max. 2 A4 pages) of how it is ensured that the replaced devices were properly disposed of (e.g. by means of declarations, disposal items on contractor invoices, etc.).
- 2.Invoice documents (PDF, PNG or JPEG format)
- 3.Images/photos of the rating plates of the old devices and the new installation (PDF, PNG or JPEG format)
Calculation basics: symbols, units and formulasNot needed for the review, useful for recalculating
Symbols, Terms and Units
| Symbol | Description | Unit |
|---|---|---|
E | annual electricity consumption | kWh/a |
ΔEeco | cumulative electricity savings | kWh |
Ė | electrical power consumption | kW |
Ns | Standard effective duration | a |
ton | annual operating hours | h/a |
Calculation Formulas
Cumulative Electricity Savings
ΔEeco = (Eold - Enew) × feco × Ns
The cumulative electricity savings result from the difference between the electricity consumption of the old and new state, multiplied by the reduction factor and the standard effective duration.
Annual Electricity Consumption
Ex = ton × (ft,100% × Ė_100%,x + ft,75% × Ė_75%,x + ft,50% × Ė_50%,x + ft,25% × Ė_25%,x)
The annual electricity consumption is calculated based on the electrical power consumption at different partial loads and the annual operating hours.
Downloads
Documentation (PDF)Complete technical documentation including calculation basisDownload DOC
Excel Calculator (XLSX)Interactive calculation tool for savingsDownload PRO
Other measures in Heating Technology
HZ-01aReplacement of Electric Water Heaters in BuildingsHZ-02aReplacement of Circulation Pumps for Heating Groups in BuildingsHZ-03aReplacement of Decentralized Electric Heating by Air Conditioning Units in Residential BuildingsHZ-03bRetrofitting of Remote Control for Heating in Second and Holiday Homes
Part of the EFFEL programme
Standardised measures are one of two measure types in the EFFEL programme (efficiency improvements by electricity suppliers, Art. 46b EnG). They follow a predefined SFOE catalogue with fixed savings values.