Ardor

Articles

Analysis, guides, and background on EnEfG compliance, waste heat utilisation, and the future of European data centres.

Regulatory
18 April 2026

The EnEfG Reporting Obligation 2027: What Operators Need to Know Now

The next BAFA waste heat reporting deadline falls on 31 March 2027. An overview of the obligations under §§ 13 and 17 EnEfG, threshold values, and what happens if you take no action.

8 min
Methodology
15 April 2026

Calculating Waste Heat: A Guide for Energy Managers

IT load, PUE, cooling type, recovery efficiency. The four input values from which a data centre's annual waste heat can be derived, and why the conservative approach is the better one.

12 min
Analysis
10 April 2026

District Heating and Data Centres: The 30-Billion-Euro Opportunity

European municipal utilities pay €35–55 per MWh for gas-based district heating. Data centres release 180 TWh of waste heat annually into the atmosphere at no cost. Why this equation is generating a market that is only now taking shape.

10 min
Technology
5 April 2026

PUE 1.3 by 2030: The Path to the EnEfG Final Target

Existing data centres must achieve a PUE of ≤ 1.3 by 2030. The technical measures that make this possible, from hot-aisle containment to liquid cooling.

14 min
Funding
1 April 2026

BAFA Module 3: Funding for Waste Heat Recovery

Up to 45% funding for SMEs and 35% for mid-sized companies. Which projects are eligible, how the application process works, and which documents need to be prepared.

9 min
Economics
25 March 2026

What Does Connecting to a District Heating Network Actually Cost?

Three concrete case studies from Frankfurt, Munich, and Hamburg: pipe route costs, heat pump investments, payback periods. What is often missing from reports and quotes.

11 min

Newsletter

Regulatory updates, deadlines, and technical articles once a month. For energy managers at European data centres.