# Warmwasserrechner

> Kostenrechner für Verbraucher - Cost calculators for comparing household heating systems

## About

This site provides interactive cost calculators to help consumers make informed decisions about household investments. Currently focused on hot water heating system comparisons for single-family homes in Germany, Austria, and Switzerland.

**Author:** Katja Süss
**Languages:** German (de-DE, de-AT, de-CH)
**Website:** https://rohberg.ch

## Main Pages

- [Home](https://vergleichen-berechnen.de/)
  Overview of available calculators
  
- [Warmwasser Calculator](https://vergleichen-berechnen.de/warmwasser)
  Interactive cost comparison for hot water heating systems (HTML for browsers, Markdown for AI agents)
  Compares: Heat pump water heaters, Electric boilers, Gas boilers, Electric instantaneous heaters
  Calculates: Total Cost of Ownership (TCO) including acquisition and lifetime energy costs
  Content negotiation: Request with 'Accept: text/markdown' header to get detailed markdown documentation

## Discovery

- [https://vergleichen-berechnen.de/robots.txt](https://vergleichen-berechnen.de/robots.txt)
  Standard robots.txt with crawling rules
  
- [https://vergleichen-berechnen.de/sitemap.xml](https://vergleichen-berechnen.de/sitemap.xml)
  XML sitemap of all public pages
  
- [https://vergleichen-berechnen.de/llms.txt](https://vergleichen-berechnen.de/llms.txt)
  This file - structured information for LLMs and AI agents

## Features

### Warmwasser Calculator

Compares four hot water heating systems:

1. **Warmwasser-Wärmepumpe (Heat Pump Water Heater)**
   - Modern, energy-efficient technology
   - Lowest operating costs
   - Uses electricity + ambient heat

2. **Elektro-Boiler (Electric Boiler)**
   - Proven technology
   - Moderate acquisition costs
   - Uses electricity

3. **Gas-Boiler (Gas Boiler)**
   - Traditional solution
   - Requires gas connection
   - Uses natural gas

4. **Elektrischer Durchlauferhitzer (Electric Instantaneous Heater)**
   - Decentralized hot water on demand
   - No storage needed
   - Uses electricity

### Calculation Method

- Acquisition costs (device + installation)
- Annual energy costs based on usage patterns
- Lifetime operating costs
- Total Cost of Ownership (TCO) for realistic comparison

### Language Support

Fully localized for three German variants with country-specific:
- Currency formatting
- Energy cost defaults
- Terminology

### Additional Features

- Export functionality for calculations
- Dark mode support
- GDPR-compliant cookie consent
- Responsive design for mobile and desktop


## Contact

For questions or feedback, please contact through https://rohberg.ch.