Official Documentation & Downloads

1. Technical System DescriptionSí-Climate – Functionality and System Architecture

The technical system description outlines the fundamental architecture of the Sí-Climate System and its three core components: SíAir, SíWater and SíSand.

It explains the operating principles of pressureless heat storage, passive air distribution, on-demand domestic hot water preparation, and the key energetic parameters of the overall system.

This document provides planners, architects and energy consultants with an introduction to the physical principles and basic structural concept of the system — without disclosing internal design details.

Download:

– Heating System Description according to GEG § 60 ff. (PDF)

2. Comparative Studies

Sí-Climate in Technical and Economic Comparison to Conventional Heating Systems

These studies position the Sí-Climate System in comparison with today’s common heating and cooling technologies such as heat pumps, gas condensing boilers, biomass systems and electric direct heating.

Assessed criteria include:

energy efficiency, operating costs, service life, maintenance effort, degree of autonomy, ecological factors and investment security.

The documents demonstrate why Sí-Climate forms a category of its own — and what specific advantages it offers users and investors.

Downloads:

– Systematic Comparison: Sí-Climate vs. Conventional Heating Technologies (PDF)

– Investor Product Comparison (PDF)

3. GEG Compliance & Energy Certificates

Guideline for GEG-Compliant Integration of the Sí-Climate System

These documents explain how the Sí-Climate System is classified as a heating and domestic hot water system according to the German Building Energy Act (GEG), and how it is entered correctly in the major software tools (EVEBI, Hottgenroth, ZUB Helena, PHPP).

Contents covered:

Entry models for heat generation, domestic hot water and air distributionDetermination of the renewable energy share (typically 85–98 %)Balancing of seasonal heat storageSample templates for energy performance certificates

These documents provide energy consultants, authorities and planners with a complete technical basis for regulatory documentation.

Downloads:

– Classification of the Sí-Climate System as a Heating System under the GEG (PDF)

– Model System for Energy Consultants – Balancing Basis (PDF)

– Template for the Energy Performance Certificate (PDF)

4. Official Expert Report (GEG)

Expert Assessment in Accordance with the German Building Energy Act

The expert report contains the technical and legal assessment of the Sí-Climate System within the framework of the current Building Energy Act (GEG).

It demonstrates that the system fulfils the requirements for space heating, domestic hot water production and renewable energy usage, thereby being recognised as a fully valid heating system under GEG.

This document provides authorities, planners and institutions with a reliable basis for approvals and regulatory evaluations.

Download:

– Official Expert Report for Building Authorities / Planning Offices (PDF)

– Technical-Legal Argumentation: Classification of the Sí-Climate System under the GEG (PDF)