HEATVENTORS HOENERGIATAROLO KORLATOLT FELELOSSEGU TARSASAG

Their core work

Heatventors is a Hungarian SME whose core business is thermal energy storage — their company name literally means "heat energy storage" in Hungarian. Their proprietary HeatTank technology stores heat to deliver energy-efficient cooling for infrastructure such as telecom data centers, addressing both energy cost reduction and grid flexibility. Beyond their own product, they have participated in large-scale European building renovation programs, contributing pre-assembled solutions and market transformation strategies for deep energy renovation of the existing building stock. Their practical angle — commercializable products rather than lab research — makes them a technology integrator rather than a research institution.

What they specialise in

How they've shifted over time

Both H2020 projects are dated 2019, so there is no long temporal arc to trace. However, the two projects reveal a clear strategic pivot within the same year: HeatTank was a self-funded feasibility study on their own thermal storage product for a niche infrastructure application (telecom cooling), while StepUP placed them inside a broad European Innovation Action targeting deep renovation of the entire building stock. The shift in keywords — from nothing specific in HeatTank to deep renovation, decarbonisation, pre-assembly, and market transformation in StepUP — suggests Heatventors recognized that their heat storage technology could find a much larger market in building renovation, and sought EU collaboration to scale that positioning.

Heatventors appears to be expanding their thermal storage technology from niche infrastructure cooling toward the mass market of European building stock renovation, a sector with strong policy tailwind under the EU Green Deal.

How they like to work

Their coordinator role in HeatTank was a solo SME Instrument Phase 1 grant — essentially a self-directed feasibility study rather than leading a multi-partner consortium. Their participation in StepUP shows they can operate as a specialist technology contributor inside larger Innovation Action consortia. The combination of 15 unique partners across 7 countries from just 2 projects indicates they entered StepUP as part of a broad, diverse European consortium rather than a tight recurring network.

Heatventors has collaborated with 15 unique partners across 7 countries, almost entirely through their participation in StepUP — a large Innovation Action that naturally brings together a wide cross-section of European partners. Their network is broad but young, with no evidence of recurring partnerships yet.

What sets them apart

Heatventors is one of the very few Central and Eastern European SMEs combining proprietary heat storage hardware with active involvement in large EU building renovation programs — a combination that is rare among Hungarian industrial companies. Their technology is product-grade rather than prototype-stage, which makes them a practical partner for Innovation Actions that need real components to demonstrate and deploy. For consortium builders targeting the renovation sector, they bring both a commercializable thermal technology and an Eastern European industrial manufacturing perspective.

Highlights from their portfolio

• StepUP
  A multi-year EU Innovation Action (2019–2024) on deep energy renovation uptake — Heatventors' largest engagement by funding (€162,750) and the project that connected their heat storage technology to the mainstream building decarbonisation agenda.
• HeatTank
  Their own coordinated SME Instrument project validating a thermal storage solution for telecom data center cooling — evidence of an independently developed, market-facing technology product.