Hotta

What Hotta does

Hotta, legally Therminer S.L., is a Spanish climate-tech company founded in 2022 in Soria and rebranded in 2024, that delivers heating and domestic hot water as a service by recovering waste heat from computing servers integrated inside its proprietary Smart Heater boilers. The system uses heat exchangers that the company reports achieve 92% thermal efficiency, converting computational energy into thermal energy for central heating, DHW, and pool heating, with modular POD-TM units extending the approach to industrial and commercial applications. A smart thermostat enables continuous consumption monitoring and remote control.

The company operates a heating-as-a-service business model: Hotta finances, installs, monitors, and maintains all equipment at zero upfront cost to the customer, who pays only for actual thermal energy consumed on a monthly basis. Target segments include hotels and residences, residential communities (comunidades de vecinos), heated pools at wellness and sports facilities, industrial and commercial sites, and individual households. Distribution combines direct enterprise sales with a partner program targeting installers, property managers, engineering firms, and energy managers across Spain.

Hotta is backed by strategic partners Domusa Teknik, Mondragon, and Fluidra, venture capital from Faraday Venture Partners, and non-dilutive funding from CDTI NEOTEC, ENISA, and EOI. It has converted an industrial warehouse in Soria into a production, R&D, and operations center, and is a member of NVIDIA Inception and Microsoft for Startups. The company reports 30+ installations across Spain, with claimed outcomes of 95% average heating-cost savings and over 20,000 kg CO2 avoided annually per installation.

Name

Hotta

Legal name

Therminer S.L

Website

https://hotta.es

Company type

Private

Founded year

2022

Operating status

Operating

Headcount range

11–50 employees

Short description

Hotta is a Spanish climate-tech company that delivers heating and domestic hot water as a service by recovering waste heat from computing servers inside its proprietary Smart Heater boilers, financed at zero upfront cost and billed monthly by consumption to hotels, residential communities, pools, and industrial sites.

Ownership category

akta.pro rank

Product category

Smart Heating Services

NAICS

Power Boiler and Heat Exchanger Manufacturing (33241), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414)

SIC

Heating Equipment, Except Electric & Warm Air Furnaces (3433)

akta.pro primary industry

Heat Exchangers & Thermal Transfer Equipment (IMAHAKAC)

akta.pro secondary industries

District Heating & Cooling Thermal Storage (Network-Integrated TES) (EUAFANAH), Industrial Process Heat TES (Steam, Kilns, Furnaces, Waste-Heat Coupling) (EUAFANAI)

Keywords

• Waste heat recovery
• Smart heating service
• Heating-as-a-service
• Server heat reuse
• Thermal energy recovery

Headquarters

HQ city

Soria

HQ country

Spain

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Operations, Supply Chain, Technology or R&D, Personnel, Marketing or Sales, Infrastructure

Revenue model

1. Usage-based Heating Service: Hotta finances, installs, and maintains the Smart Heater system. Customers pay only for their actual energy consumption on a monthly basis, with no initial investment required. This creates a recurring revenue stream based on thermal energy consumption.
2. Energy Efficiency Services: Additional services including energy audits, installation, and ongoing maintenance bundled with the hardware service model.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

Hotta finances, installs, and maintains proprietary Smart Heater systems that recover waste heat from computing servers at 92% thermal efficiency and convert it into central heating and domestic hot water for residential communities, hotels, heated pools, and industrial facilities. Customers pay zero initial investment and are billed monthly based only on actual thermal energy consumption, with all installation, 24/7 monitoring, and maintenance included.

Product overview

Hotta offers a unified Smart Heating solution combining the Smart Heater (a boiler containing servers that recover residual heat with 92% efficiency) with an-as-a-service business model. The portfolio includes modular POD-TM systems for heat recovery, professional services for residential communities, hotels and residences, heated pools, and industrial applications. Customers pay zero initial investment and only for actual consumption. The offering integrates design, financing, installation, monitoring, and maintenance. A partner program extends reach through installers, property managers, and engineering firms.

Differentiator

Problem solved

Functional benefit

Brands

• Smart Heater: A smart heating system that contains servers and recovers residual heat for heating and hot water applications.

Products and services

• Smart Heater A smart heating boiler containing integrated computing servers whose heat is recovered and used to produce hot water for central heating and domestic hot water (DHW), featuring 92% thermal efficiency, plug & play installation, and zero initial investment. Designed for hotels, residential communities, heated pools, industrial facilities, and individual households.
• Smart Heating (heating-as-a-service) A managed heating service in which Hotta designs, finances, installs, monitors, and maintains the heating system for the customer. Customers pay only for actual consumption on a monthly basis, with no upfront cost and all installation, renovation, and maintenance included.
• POD-TM Modular Heat Recovery System Modular systems that convert residual heat from servers into reusable thermal energy for industrial, commercial, and residential applications. Developed as part of CDTI NEOTEC funded R&D for decentralizing data center heat reuse.
• Energy Study (Estudio Energético) Free personalized energy assessment performed by specialized technicians. Analyzes installation viability, evaluates Smart Heating potential, and provides savings estimation, emissions reduction, and an implementation plan.
• Residential Communities Service (Comunidades de Vecinos) Smart heating solution tailored for residential communities with central heating systems. Replaces traditional gas systems and eliminates the need for derramas (special assessments) from neighbors.
• Hotels and Residences Service Smart heating service for hotels, residences, resort complexes, and tourist houses targeting ACS and climate control, where HVAC can represent up to 30% of total operating costs. Aims to control spending and reduce carbon footprint.
• Heated Pools Service (Piscinas Climatizadas) Smart heating service for wellness facilities, spas, swimming pools, and sports centers needing to maintain water temperature between 25 and 30°C. Optimizes monthly costs with no initial investment.
• Industrial and Business Service (Empresas)

Quantifiable outcome

• 95% average savings on heating costs compared to traditional gas systems
• +4 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Seven partnerships are on record, tiered core and supporting.

• Domusa TeknikcoreStrategic or Co-development PartnerIndustrial heating equipment manufacturer providing strategic backing. Domusa Teknik's expertise in heating systems complements Hotta's waste heat recovery technology, enabling joint development of integrated heating solutions.
• MondragoncoreStrategic or Co-development PartnerMajor Basque industrial and cooperative group providing strategic backing. As one of Spain's largest industrial groups with expertise in energy and manufacturing, Mondragon supports Hotta's growth and market expansion.
• FluidracoreStrategic or Co-development PartnerGlobal pool and wellness equipment manufacturer providing strategic backing. Fluidra's presence in pools and wellness facilities supports Hotta's expansion in the heated pool segment.
• NVIDIAsupportingTechnology or IntegrationHotta is a member of the NVIDIA Inception program, gaining access to GPU technology, technical resources, and startup ecosystem support for AI and computing applications.
• MicrosoftsupportingTechnology or IntegrationMember of Microsoft for Startups program providing cloud computing resources, development tools, and market access support.
• Soria EmprendesupportingStrategic or Co-development PartnerLocal startup support organization in Soria providing backing for the company's regional operations.
• AeversupportingStrategic or Co-development PartnerStartup ecosystem supporter providing strategic backing for company growth.

Scale indicators11 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Carrier Global: Global HVAC/R incumbent offering chillers, heat pumps, and commercial heating solutions. Overlaps with Hotta in commercial and hotel-climate applications, with broader portfolio and substantially larger resources.
• Daikin: Global HVAC leader with strong heat-pump portfolio for residential, commercial, and pool heating. Competes with Hotta across pool, hotel and residential use cases via a deeply established distribution and service infrastructure.
• NIBE Energy Systems: Swedish market leader in heat pumps and residential heat-recovery solutions. A much larger, established player in the same European space, with overlapping decarbonization-of-heating value proposition that competes for the same gas-replacement budget.
• Bosch Thermotechnology: Global OEM of boilers, heat pumps, and hybrid heating systems for residential and commercial buildings. Competes for the same heating-modernization budgets, backed by a far larger service and installer network.

Direct peers

• Nerdalize: Netherlands-based startup that housed cloud servers in residential radiators so the heat could warm homes. Closely overlapping business model and European residential-heating positioning to Hotta.
• Qarnot Computing: French company pioneering the same "compute-as-heating" concept: integrating servers into radiators/boilers to deliver free heating to buildings while providing distributed cloud compute. Closest functional analogue to Hotta's Smart Heater and POD-TM platform.
• Deep Green: UK startup that places small data centers inside swimming pools, schools and community buildings to provide free heat, with zero upfront cost to the host. Directly comparable to Hotta on business model and target segments (pools, communities).
• Heata: UK startup distributing small compute clusters to homes for hot-water heating. Operates a comparable distributed, server-derived heating-as-a-service model similar to Hotta's residential proposition.

Emerging players

• Antora Energy: US startup producing industrial heat and electricity from intermittent renewables using thermal storage. Comparable emerging industrial-heat decarbonization positioning to Hotta's industrial/POD-TM ambitions.
• Rondo Energy: US industrial-heat decarbonization company delivering industrial heat from renewable electricity via thermal storage. Targets industrial process heat with a different technology stack but in the same decarbonization-of-heat wedge Hotta serves with its POD-TM industrial offering.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/hottaspain
• YouTubeyoutube.com/channel/UC0B4J7bKEazygzrWd_S6lfA
• LinkedInes.linkedin.com/company/therminer
• Instagraminstagram.com/hottaspain

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Hotta