Calentix Energy
A permanent baseload heat source, with zero capital risk
For district heating operators

A permanent baseload heat source, with zero capital risk

Data centres run 24/7. Their waste heat is one of the most reliable, lowest-carbon heat sources available at scale. We deliver it under a long-term Heat Purchase Agreement, you carry no investment risk.

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What you get

The IHP proposition for district heating operators

At least 10% lower heat production costs

Data centre waste heat at COP 3.5–6 consistently undercuts biomass, gas and conventional heat pump alternatives on levelised cost. The electricity cost per MWh is one quarter to one third of the electricity price, the primary driver of the economics.

Zero capital investment from you

The project company owns the entire heat recovery asset: heat exchangers, heat pumps, pipework and monitoring infrastructure. You sign an HPA and receive heat. The investment risk sits with the project, not with you.

One third of the carbon footprint vs. gas

Data centre waste heat carries minimal additional carbon, directly supporting your decarbonisation targets. Verified carbon accounting is provided for your reporting obligations.

Long-term price stability

HPA pricing is indexed to an agreed formula, insulating your network from gas and biomass price volatility. A predictable cost structure for long-term planning.

Exceptional supply stability

Data centres operate at consistent loads year-round. Unlike industrial waste heat, servers don't take holidays or seasonal shutdowns. Contracts specify a heat delivery band with guaranteed minimum volumes and uptime obligations backed by buffer storage.

Technical detail

Temperatures, volumes and network integration

01

Delivery temperatures

Modern industrial heat pumps in data centre applications reliably deliver 70–90°C. Fourth generation district heating networks (4GDH) at 55–70°C supply are particularly well suited and allow a higher COP. Higher temperature requirements are achievable but affect efficiency.

02

Heat volumes & stability

A data centre with 10 MW IT load can supply 5–8 MWth. Data centres operate at consistent loads year-round, and buffer storage provides reserves during planned maintenance windows.

03

COP & economics

COP of 3.5–6 depending on season and network return temperature. At COP 5, the electricity cost per MWh of heat is one fifth of the electricity price, significantly cheaper than gas or biomass alternatives on a levelised basis.

Rows of stainless-steel heat distribution pipes in a district heating plant
Partnership terms
15+ years
HPA contract term, bankable and lender-accepted
1–20 MWth
Typical project heat capacity
70–90°C
Heat pump delivery temperature (network dependent)
€0
Capital required from the DH operator
Common questions

What district heating operators ask us

Four key criteria: a data centre with liquid cooling and IT load above 2–5 MW; a project within 1–2 km of your network connection point; a network return temperature below ~55°C in summer (higher return temperatures are harder for the heat pump); and a supply temperature we can match. The feasibility study establishes all of this precisely.

Our agreement with the data centre includes provisions for load variability, and the HPA with you specifies a delivery band rather than a fixed volume. We monitor IT load trends and design for expansion scenarios, the typical trajectory for European data centres in the AI era. We carry the risk of the data centre relationship, not you.

At a COP of 4, one MWh of heat requires approximately 2.5 kWh of electricity input per 10 kWh of heat, versus ~11 kWh of gas at 90%+ thermal efficiency. At current electricity-to-gas price ratios across our markets, data centre waste heat is consistently cheaper on a levelised basis than gas, biomass, or heat pumps drawing from ambient sources.

Only a metered connection point at the agreed delivery temperature. Everything upstream, the data centre relationship, the heat pump system, construction, monitoring, regulatory reporting, is Calentix's responsibility. A buffer storage tank at the heat pump station provides thermal reserve, giving you time to bring alternative sources online if needed.

Is there a data centre near your network?

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