Duo-Thermo, Lda

What Duo-Thermo, Lda does

Duo-Thermo, Lda is a privately held Portuguese company specializing in premium infrared radiation heating solutions for residential and commercial properties. Founded in 1997 in Boliqueime by Ma. Lourdes Baltes and Paul Baltes, the company has operated for approximately 28 years and is currently led by Florian Baltes as CEO, with both founders remaining active in customer support and technical advisory roles. The company maintains a lean team of six employees and operates from its headquarters on the EN 125 road in Boliqueime.

Its product portfolio centers on six core offerings built around infrared radiation technology: the DELUXE natural stone wall-mounted radiator, an in-wall radiant heating block for invisible wall heating, outdoor infrared radiators for terraces and large surfaces, the LAVA wall and ceiling radiator, electric underfloor heating systems (distributed under partnership with Austrian manufacturer Etherma), and supporting accessories such as towel warmers. The company positions these as premium, aesthetically differentiated alternatives to conventional heating, emphasizing energy efficiency, homogeneous temperature distribution, ecological benefits, and health advantages of radiant heat, supported by a 10-year product warranty.

Duo-Thermo monetizes primarily through one-time hardware sales plus bundled professional installation performed by its own production and installation team. Pricing is quote-based and not publicly disclosed, with each project accompanied by a personalized heating study. Go-to-market combines direct field sales via regional commercial managers (covering Centro-Sul Portugal and Alentejo), a domestic e-commerce storefront at store.duo-thermo.com, and a reseller network across Portugal. Over 60% of new customers originate from referrals, and the company supplements sales with content marketing via its blog, social media presence on Facebook and Instagram, and participation in Portuguese trade events such as BLiP Expo.

Name

Duo-Thermo, Lda

Legal name

Duo-Thermo

Website

https://duo-thermo.pt

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

1–10 employees

Short description

Duo-Thermo is a privately held Portuguese company that designs, distributes, and installs premium infrared heating solutions — including natural stone radiators, in-wall radiant blocks, outdoor radiators, and electric underfloor heating — for residential, commercial, and luxury real estate clients across Portugal.

Ownership category

akta.pro rank

Product category

Infrared Heating Solutions

NAICS

Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341)

SIC

Electric Housewares & Fans (3634)

akta.pro primary industry

Residential HVAC System Installation (Furnace/AC/Heat Pump) (HSAOAGAA)

akta.pro secondary industry

Radiant Floor Heating Installation (Underfloor Systems) (HSAPAGAJ)

Keywords

• Infrared heating solutions
• Natural stone radiators
• Electric underfloor heating
• Radiant wall heating
• Outdoor infrared radiators

Headquarters

HQ city

Boliqueime

HQ country

Portugal

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Infrastructure

Revenue model

1. Heating Equipment Sales: Sale of premium infrared heating products including natural stone radiators, in-wall radiant blocks, outdoor radiators, and electric underfloor heating systems. One-time purchase model with 10-year warranty.
2. Installation Services: Professional installation services provided by the company's own production and installation team, including technical support and after-sales service.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Duo-Thermo, Lda designs, sells, and installs premium infrared radiant heating solutions for residential, commercial, and luxury properties in Portugal. Its core product range includes natural stone wall radiators (DELUXE®), concealed in-wall radiant blocks, electric underfloor heating (Etherma), outdoor infrared radiators, and wall/ceiling LAVA radiators, complemented by accessories and a professional in-house installation service backed by a 10-year warranty.

Product overview

Duo-Thermo offers a portfolio of premium infrared radiant heating solutions. The product range centers on six main offerings: DELUXE® Natural Stone Radiators (design-focused wall-mounted panels), Electric Underfloor Heating systems (for new builds, renovations, and floating floors), In-Wall Radiant Heating Blocks (concealed wall heating), Outdoor Infrared Radiators (for outdoor areas), LAVA Wall and Ceiling Radiators (for challenging heating applications), and Accessories including towel warmers. All solutions share the common characteristic of infrared radiation heating technology, providing aesthetic design, energy efficiency, thermal comfort, ecological efficiency, and health benefits.

Differentiator

Problem solved

Functional benefit

Brands

• DELUXE®: Natural stone radiator with innovative technical features and premium design aesthetic
• Duo-Therm®
• LAVA

Products and services

• DELUXE® - Natural Stone Radiator (Radiador em Pedra Natural) Wall-mounted natural stone radiator panel offering premium personalized thermal comfort, design aesthetics, and infrared radiation heating for residential and commercial interiors.
• Electric Underfloor Heating (Piso Radiante Elétrico - Etherma) Austrian premium-quality electric underfloor heating system available in three configurations: new construction installations, renovation installations without removing existing flooring, and solutions for floating floors.
• In-Wall Radiant Block (Bloco Radiante In-Wall) Concealed radiant heating block installed within wall structures, providing invisible wall heating with maximum energy efficiency through infrared radiation.
• Outdoor Infrared Radiators (Radiadores Infravermelhos de Exterior) Outdoor infrared radiant heaters providing heating for outdoor areas and large surfaces that are difficult to heat with conventional systems.
• LAVA - Wall and Ceiling Radiator (LAVA - Radiador de Parede e Teto) Wall and ceiling radiant heater offering multiple infrared heating solutions for difficult-to-heat applications.
• Accessories (Acessórios) Heating accessories including towel warmers and complementary components for residential heating installations.
• Professional Installation Service In-house professional installation, technical support, and after-sales service for Duo-Thermo heating products, delivered by the company's own production and installation team.

Quantifiable outcome

• 60%+ of customers come through referrals
• +1 more outcomes

Named customers12 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Herschel Infrared: UK-based specialist in infrared heating panels and radiant solutions for residential and commercial spaces. Closely comparable product portfolio and go-to-market approach to Duo-Thermo's premium infrared heating line.
• Etherma: Austrian manufacturer of premium electric heating including underfloor, radiators, and infrared panels. Directly comparable product portfolio; also an existing technology partner of Duo-Thermo for underfloor heating distribution.
• Vasner: German infrared heating specialist offering indoor and outdoor infrared panels and radiant heaters. Comparable product mix across residential, commercial, and outdoor infrared applications.
• Tansun: UK-based manufacturer specializing in outdoor infrared heating solutions for commercial and residential terraces. Directly comparable to Duo-Thermo's outdoor infrared radiator line.
• Redwell: Austrian manufacturer of premium infrared heating panels with a focus on design-led, natural-surface products. Directly comparable to Duo-Thermo's DELUXE natural stone radiator in product positioning and premium aesthetic.
• SolAire: UK-based infrared heating panel manufacturer serving residential and commercial customers with design-focused products. Comparable niche premium positioning and product range.

Broad incumbents

• Vaillant: Major European heating manufacturer offering a broad portfolio including heat pumps, boilers, and HVAC systems. Competes with Duo-Thermo in residential heating but as part of a much wider product range.
• Viessmann: European heating technology manufacturer offering boilers, heat pumps, and climate solutions. Comparable target market in residential heating but with vastly larger scale and product breadth.
• Bosch Thermotechnology: Global heating, cooling, and hot water solutions provider under the Bosch brand. Competes in residential heating with significantly broader scale and product breadth than Duo-Thermo.

Emerging players

• Könighaus: German infrared heating panel manufacturer with a focus on premium design products. Comparable premium infrared heating offering but with a smaller market footprint than Duo-Thermo.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/duothermo
• Instagraminstagram.com/duo_thermo
• LinkedInlinkedin.com/company/duo-thermo-lda

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 Duo-Thermo, Lda