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hansetherm

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Hamburg heat-pump specialist offering planning, install and service nationwide

Hamburg, GermanyFounded 2023Energy

Valuation $50–100M Last recorded · 2026

Headcount <100 Current team size

Total funding $10–50M Disclosed equity funding

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About hansetherm

hansetherm is a Hamburg-based heat-pump company that sells, installs and services residential air-to-water heat pumps as a climate-friendly heating package. Founded in 2023 by Leon Thomsen and Konstantin Lennertz (GmbH registered earlier in 2022), it offers digital planning, subsidy support, installation across Germany and ongoing maintenance under a fixed-price model, including its R290 Green units and Vaillant aroTHERM plus systems, with an app for energy management. hansetherm GmbH is registered in Hamburg (HRB 174065) at Fuhlentwiete 10.

heat pumps, residential heating, climate tech, Hamburg, energy efficiency, Vaillant

MoreLess Source: Dealroom company data

At a glance

Status: Operational
Founded: 2023
Headquarters: Hamburg, Germany
Employees: 36
Open positions: 7
Dealroom signal: 81.4/100
Industry: Energy
Sub-industry: Energy Efficiency
Sector: Energy, Sustainable Development Goals, Heat Pump, Climate Tech, Building Energy Efficiency, Efficient Air Cooling and Heating
Business model: Marketplace & ecommerce
Client focus: B2C
Links: Website LinkedIn

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Founder mafias, market maps, lists and research connected to this company by Dealroom

Market maps in Energy

Market map Energy trading startups

Market map Long duration energy storage startups

Market map Novel energy startups decarbonizing Europe

Open roles

19 open roles

Praktikant Marketing & Social MediaMarketing · Hamburg · 2w ago Technischer Planer PhotovoltaikHamburg · 3w ago DisponentHamburg · 1mo ago SHK Qualitätsmanager WärmepumpenOperations · Hamburg · 1mo ago Praktikant Einkauf & AbwicklungHamburg · 2mo ago Praktikant Founders AssociateSales · Hamburg · 2mo ago Praktikant PartnermanagementHamburg · 2mo ago Applied AI & AutomationsSales · Hamburg · 9mo ago Customer Success ManagerCustomer · Hamburg · 11mo ago InitiativbewerbungHamburg · 15mo ago B2B Partner Manager - InstallationspartnerHamburg · 21mo ago Founders AssociateSales · Hamburg · 21mo ago

From the company's careers page. The newest 12 of 19. Careers page ↗More startups hiring →

Growth signals

hansetherm website traffic

Latest recorded traffic for hansetherm is 21K monthly website visits, up 50% over the last three months. hansetherm's team grew 63.6% over the past year.

Latest monthly visits21K 3-month web change+50% 1-year team growth+63.6%

Monthly website visitsDec 2023–Jul 2026

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Open positions

Openings linked to this company in Dealroom

SHK-Meister / Geselle für Materialdisposition und Einkauf (m/w/d)Hamburg, Hamburg, Germany · Other · Sep 7, 2026 Anlagenmechaniker SHK (m/w/d)Kassel, Hesse, Germany · Other · Sep 6, 2026 Elektriker (m/w/d)Kassel, Hesse, Germany · Other · Sep 2, 2026 B2B Partnership Manager (m/w/d)Hamburg, Hamburg, Germany · Business Development · Sep 2, 2026 Chief of Staff (m/w/d)Hamburg, Germany · Human Resources · Jan 22, 2026 Founders Associate (m/w/d)Hamburg, Germany · Other · Jan 22, 2026 HR Generalist Recruiting (m/w/d)Hamburg, Germany · Human Resources · Jan 22, 2026

7 distinct openings shownExplore hiring signals →

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