What Caleosol does

Caleosol is the commercial brand of FreeHeat SAS, a privately held French manufacturer founded in 2010 and headquartered in Villerbon (Loire Valley) with production facilities in Blois and St Denis / Loire. The company designs and produces a complete range of dry, low-profile floor, wall, and ceiling heating and cooling systems built around a proprietary aluminum-diffuser technology claimed to deliver 40x the heat diffusion of steel equivalents, with products as thin as 13mm (Caleosol Classique) up to 120mm (Caleosol Tradi ECO+). Its portfolio covers three dry floor systems (Tradi, Classique, Gypse), complementary dry and liquid screeds (Caleodur 12.5mm, Fermacell 20mm, Thermio+/ThermioMax 25mm liquid), wall and ceiling radiant panels, reversible low-temperature radiators, geothermal heat pumps (inverter R32/R290), solar thermal and hybrid PV-thermal panels (CaleoSoleil, Soleil-ô), and the proprietary glycol-free FreeHeatBox. The company is sold via a hybrid model combining direct-to-consumer e-commerce and phone sales with public per-m² pricing, a network of specialized heating retailers (négoce) and trained installers across France, Belgium, and Switzerland, and bundle partnerships (notably Samsung for heat pumps and Optinid for tiny houses).

Caleosol monetizes primarily through one-time hardware sales priced by the square meter (e.g., Caleodur at €16.20/m², Caleosol Gypse at €81.60/m², Thermio+ liquid screed around €20/m²), with revenue also derived from accessories, installation kits (CaleoPuzzle, Kit de Pose), and complementary solar/geothermal systems. Technical services — including free thermal studies under NF/EN 1264, free Calepinage layout software (Windows/Mac/Unix with .DWG/.JPG output), and free on-call technical assistance — are positioned as conversion drivers rather than standalone revenue. Customer segments span self-builders and individual homeowners, professional installers (Qualisol-certified, 500+ Thermio+ applicators), specialized négoce distributors, and select enterprise projects in hospitality and historic restoration (e.g., Hotel in Amboise at 1,200 m², Château Camus, Donjon Maurepas). The company has produced 300,000 m² of floor heating across 4,000+ projects since 2010, with 90% of systems using natural wood fiber (ECO+) insulation associated with up to 90% lower CO2 emissions versus traditional wet systems. Share capital is €85,000 with no disclosed external funding; the founder and President, Olivier Cazeaux (former McKinsey, Kaizen, Valeo), leads a compact multidisciplinary team covering commercial, geothermal, calepinage, domotics, and logistics functions.

Name

Caleosol

Legal name

FreeHeat SAS

Website

https://plancher-chauffant-caleosol.fr

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

11–50 employees

Short description

Caleosol (FreeHeat SAS) is a French manufacturer of dry, low-profile floor, wall, and ceiling heating and cooling systems, selling to self-builders, professional installers, and négoce retailers across France, Belgium, and Switzerland via direct e-commerce and channel partners.

Ownership category

akta.pro rank

Headquarters

HQ city

Villerbon

HQ country

France

HQ region

Europe

Offices3 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Floor/Wall/Ceiling Heating Systems: Direct sales of proprietary dry heating floor systems including Caleosol Tradi (ECO+, XPS, TMS variants), Caleosol Classique, Caleosol Gypse, and related components (tubes, collectors, mixing stations). Sold directly to end consumers via e-commerce and phone, and through professional installer networks.
2. Dry Screed and Finishing Products: Caleodur (12.5mm dry screed), Fermacell 20mm panels, Thermio+ liquid screed, and related installation kits sold per square meter.
3. Geothermal and Solar Solutions: Heat pump systems (inverter R32 R290), geothermal walls, FreeHeatBox systems, and CaleoSoleil solar thermal panels for comprehensive heating and hot water solutions.
4. Technical Services: Free technical studies and quotes (90% completed within 1 hour after phone contact). Thermal studies using NF/EN 1264 standard tables. Technical training and assistance for installers.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels7 records

Core offering

Caleosol designs, manufactures, and sells dry (no concrete drying time) radiant floor, wall, and ceiling heating and cooling systems for residential and light-commercial buildings. Core offerings include the Caleosol Tradi, Classique, and Gypse low-profile dry heating panels with aluminum-diffuser technology and ECO+ natural wood fiber or EPS/XPS/TMS insulation, complemented by Caleodur dry screed, Fermacell and Thermio+ finishing screeds, reversible low-temperature radiators, CaleoSoleil/Soleil-ô solar thermal panels, and hybrid photovoltaic-thermal solar modules. Products are sold per square meter via direct e-commerce and phone sales to self-builders and homeowners and through trained installer and retailer networks in France, Belgium, and Switzerland.

Product overview

Caleosol is a French manufacturer of dry floor, wall, and ceiling heating/cooling systems operated by FreeHeat SAS. The product portfolio centers on three main floor heating systems: Caleosol Tradi (premium with multiple insulation options including natural wood fiber ECO+), Caleosol Classique (ultra-thin renovation-focused at 13-50mm), and Caleosol Gypse (gypsum-based 18mm system). These core systems are complemented by complementary finishing products including Caleodur dry screed, Fermacell screed, and ThermioMax liquid screed. The broader ecosystem includes solar thermal products (CaleoSoleil, Soleil-ô, hybrid solar panels), the proprietary FreeHeatBox technology, reversible radiators, geothermal heat pumps, and supporting tools like TAG wireless sensors and layout software. The company emphasizes low-carbon, rapid-installation solutions made in France with natural materials.

Differentiator

Problem solved

Functional benefit

Brands

• CaleoMur: Wall heating products
• CaleoPlafond
• CaleoSoleil
• Jupiter
• Soleil-ô
• Le chaudron Polaire
• FreeHeatBox
• Caleodur
• CaleoPuzzle

Products and services

• Caleosol Tradi Dry thin floor heating system with aluminum diffusers and high-performance PERT tubing, available in three insulator types (ECO+ natural wood fiber, XPS extruded polystyrene, TMS polyurethane) with thicknesses from 20mm to 110mm; functions as heating and reversible cooling with immediate use after installation.
• Caleosol Classique Ultra-thin dry floor heating panel ideal for renovation projects, available in thicknesses from 13mm to 50mm, with EPS insulation and a factory-thermocontacted aluminum emitter covering the entire surface, supporting direct tile or parquet finishing.
• Caleosol ECO+ Natural wood fiber version of Caleosol Tradi made in France with 200kg/m³ density, providing 19dB sound insulation improvement and 20mm to 120mm thicknesses for RT2020-compliant natural insulation.
• Caleosol Gypse (Sur-plancher) Pure reinforced gypsum heated floor, ceiling, and wall panel of 18mm thickness, with 600x1200mm plates and 12cm pipe spacing delivering 100W/m² at 37°C water temperature, suitable for tile bonding and parquet finishes.
• Mur Chauffant Gypse Gypsum heated wall system with 18mm thick plates (600x1200mm straight plaques and 600x600mm return plaques), 12cm pipe spacing for higher heating power than floor systems, available for timber frame, metal frame, and mass wall installations.
• Plafond Chauffant Rafraîchissant Heating and cooling ceiling system with three types of radiant ceiling panels providing efficient thermal comfort through ceiling surface radiation, integrating with Caleosol's low-temperature reversible solutions.
• Radiateurs Réversibles Reversible hot/cold radiators, cassettes, and channels designed for very low temperature operation, completing Caleosol's portfolio of reversible heating and cooling solutions that can run alongside floor, wall, and ceiling systems.
• FreeHeatBox Proprietary glycol-free, self-draining, pressure-less technology enabling solar water heater conversion, multi-energy connection, and high-performance solar heating; available in FreeHeatBox 50, 70, and 1000L+ models.
• CaleoSoleil Solar thermal panels in tile and slate formats with CSTBat approval; described as the only French-designed tube panel with this certification, for solar space and water heating applications.
• Soleil-ô Tubular solar panel for direct connection to pool filtration systems (Classic version) and a 4-season model for floor heating and domestic hot water, with CSTBat approval.
• Panneau Solaire Hybride Hybrid solar panel producing both electricity and hot water with ~70% overall efficiency (vs ~18% for PV alone), preventing overheating with a maximum temperature under 100°C, weighing ~35kg and offering a 20-year lifespan.
• Jupiter Registered brand of FreeHeat SAS for dry floor heating systems, positioned as the premium offering in the Caleosol product range.
• Caleodur 12.5mm dry gypsum-cellulose screed panel for floor heating, weighing 15kg/m² and fire-rated 19 minutes, suitable for parquet, floating floors, and flexible finishes; priced at 16.20€/m² delivered in France/Belgium.
• ThermioMax (Thermio+) 25mm liquid screed finish for Caleosol Tradi systems weighing only 51kg/m² (versus 73kg/m² for competitor systems), drying in 7 days, achieving 100W/m² with tile finish, and requiring no expansion joints up to 300m²; applied by 500+ certified applicators across France.
• Fermacell Screed (20mm) 20mm dry screed made of gypsum fiberboard for floor heating, highly sound-insulating, compatible with all floor finishes including tile, weighing under 24kg/m²; combined with Caleosol Tradi to form the system's most insonorizing variant.
• TAG (Sonde Point de Rosée) Wireless temperature sensor with 0.1°C accuracy, dew point measurement, audible alerts, and IFTTT connectivity for smart-home integration and precise temporal variation control of Caleosol reversible heating and cooling systems.

Quantifiable outcome

• Up to 90% less CO2 emissions compared to traditional floor heating systems (with ECO+ natural wood fiber insulation)
• +5 more outcomes

Named customers6 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature8 records

Partnerships

Four partnerships are on record, tiered core and minor.

• SamsungcoreChannel Partner/ Reseller/ Distributor · 1 January 2010Samsung serves as a distributor for FreeHeat/Caleosol, providing heat pump solutions (PAC) as part of complete heating systems. The partnership enables bundled offerings combining Samsung heat pumps with Caleosol floor heating products.
• AFPAminorImplementation/ SI/ Consulting PartnerAFPA (Agence nationale pour la Formation Professionnelle des Adultes) provides vocational training for installers, with Caleosol products featured in their training programs for floor heating installation.
• JLL FormationminorImplementation/ SI/ Consulting PartnerJLL Formation is a professional training organization that includes Caleosol products in their curriculum for heating system installers.
• OptinidcoreStrategic or Co-development PartnerOptinid, a Tiny and Small House manufacturer, integrates Caleosol Classique 17mm floor heating systems in their prefabricated homes. Collaboration enables lightweight, low-profile heating solutions for mobile homes meeting architectural requirements.

Scale indicators10 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Rehau Group: German-based polymer and building solutions company with a major underfloor and surface heating/cooling division (Rehau Rautherm). Directly comparable to Caleosol: same hydronic radiant heating category, similar European installer-distribution model, much broader geographic and product footprint.
• Uponor Corporation: Finnish-listed global leader in radiant underfloor heating and plumbing systems (Uponor Climate Comfort). Directly comparable to Caleosol: same hydronic panel-and-tube floor/wall/ceiling products, multi-country distributor-led model, comparable European renovation positioning.
• Groupe Atlantic: Major French heating, hot water, and HVAC solutions group (Atlantic, Thermor, Sauter brands) with broad residential and commercial footprint in France. Direct French-market comparable to Caleosol on heating distribution, négocié relationships, and French regulatory alignment (RT2020).
• Roth Werke GmbH: German family-owned manufacturer of climate systems including Roth ClimaComfort radiant floor/wall heating and Roth heat pumps. Direct comparable to Caleosol for hydronic surfaces + heat-pump + solar bundle offering in European mid-market.
• Warmup plc: UK-headquartered specialist in electric and hydronic underfloor heating with strong direct-to-consumer and trade-channel brand. Comparable to Caleosol on underfloor product, online/D2C emphasis, and renovation-focused positioning.
• Variotherm GmbH: Austrian manufacturer specializing in dry wall and floor heating/cooling systems with low build-up heights. Closest conceptual peer to Caleosol: thin dry-system positioning, hybrid heating/cooling capability, similar niche-mid-market European footprint, D-A-CH heritage.

Broad incumbents

• Danfoss A/S: Danish incumbent in heating controls, hydronic balancing, and underfloor components (Icon series). Broad incumbent to Caleosol — overlaps in the radiant controls and hydronic distribution layer rather than the dry-panel product itself.
• Saint-Gobain Distribution Bâtiment: French building-materials distribution and solutions group including Point.P and SFIC rénégoces that stock dry heating and insulation products. Broad incumbent to Caleosol — competes via distribution-scale and complementary product lines (Fermacell partnership is even used by Caleosol itself).
• Viessmann Climate Solutions: German heating-systems incumbent covering heat pumps, boilers, solar thermal, and integrated climate solutions. Broader incumbent to Caleosol in adjacent categories (heat pumps, geothermal, solar thermal) — overlapping technology stack and European distribution but at substantially larger scale.
• Bosch Thermotechnology: Bosch division selling heat pumps, boilers, and residential climate systems across Europe. Broad incumbent to Caleosol in heat pumps and integrated low-carbon heating; competes for installer mindshare rather than direct underfloor SKU.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/caleosol1
• LinkedInlinkedin.com/company/freeheat-caleosol
• Xx.com/caleosol

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 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 Caleosol