ThermoSphere
ThermoSphere is a UK-based, privately held British manufacturer of electric underfloor heating systems, thermostats, electric boilers, radiators, and bathroom heating products, selling exclusively through approved UK stockists and resellers to professional installers rather than direct to end users.
- Company typePrivate
- Founded1999
- HeadquartersTonbridge, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What ThermoSphere does
ThermoSphere, trading as Thermogroup Ltd, is a privately held British manufacturer of electric heating products, headquartered in Marden, Kent. The company has operated continuously for over 25 years and builds a portfolio centred on electric underfloor heating systems (Mesh for tile/stone, Membrane for tile/stone, Foil for wood/carpet/vinyl), smart and programmable thermostats (T-MO, Dual Control, BT21), electric combi and flow boilers, electric radiators and panel heaters, electric towel bars and rails, mirror demisters, and accessories such as insulation boards. Technology differentiation is concentrated in installer-friendly design features, including accessible cable loops and continuous earth braid on the Foil system, a 7m cold tail configuration for pod-manufacturer integration, and dual-control thermostats that manage multiple bathroom heating appliances from a single unit.
The business model is exclusively B2B and channel-driven: ThermoSphere does not sell direct to end users, instead distributing exclusively through a UK network of approved stockists and resellers, with the 'Join The Circle' loyalty programme and free monthly installer training at Kent HQ serving as the primary customer-engagement flywheel. Pricing is unit-based and varies by product (for example, T-MO from £99 ex VAT, mirror demisters from ~£46 ex VAT, Foil kits from £90), with project-level volume pricing handled by stockists. The company's stated primary customer segment is professional installers (electricians, plumbers, tilers, heating professionals), with homeowners and resellers/stockists as secondary segments. Notable specification wins include the One Nine Elms - City Towers 58-storey residential project, where ThermoSphere products were specified across 667 bathrooms via bathroom pod manufacturer StoneBathwear and contracts firm CP Hart Contracts, with a stated project value of approximately £212,000.
The company shows no disclosed external investment, no subsidiaries, and no M&A activity, operating as a bootstrapped founder-owned entity with a 11-50 employee headcount and a domestic (England) operating geography. Digital presence spans LinkedIn, Instagram, Facebook, YouTube, and TikTok, and the company is actively engaged at trade events such as InstallerSHOW 2025. Revenue is not publicly disclosed and there is no mobile app, public API, or AI/ML capability referenced in the available data.
ThermoSphere firmographics
Firmographics- Name
- ThermoSphere
- Legal name
- Thermogroup Ltd
- Website
- https://thermosphere.com
- Company type
- Private
- Founded year
- 1999
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- ThermoSphere is a UK-based, privately held British manufacturer of electric underfloor heating systems, thermostats, electric boilers, radiators, and bathroom heating products, selling exclusively through approved UK stockists and resellers to professional installers rather than direct to end users.
- Ownership category
- akta.pro rank
ThermoSphere industry classification
Industry- Product category
- Electric Heating Equipment
- NAICS
- Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341)
- SIC
- Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)
- akta.pro primary industry
- Heat Exchangers & Thermal Transfer Equipment (IMAHAKAC)
Keywords
Where ThermoSphere is headquartered
LocationHeadquarters
- HQ city
- Tonbridge
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
ThermoSphere business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D
Revenue model
- Electric Heating Products: ThermoSphere generates revenue through the sale of electric heating products including underfloor heating systems (Mesh, Membrane, Foil), thermostats, radiators, boilers, towel bars, and accessories. Products are sold exclusively through approved stockists and resellers, not direct to consumers.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | T-MO Smart Thermostat |
| Unit Pricing | Pay-as-you-go | Mirror Demisters |
| Unit Pricing | Pay-as-you-go | Foil Underfloor Heating System |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels9 records
ThermoSphere product offering
Product offeringCore offering
ThermoSphere (trading as Thermogroup Ltd) is a UK-based British manufacturer of electric heating products, including electric underfloor heating systems (mesh, membrane, and foil), smart and programmable thermostats, electric boilers, electric radiators, towel warmers/bars, and mirror demisters. The company sells exclusively through approved stockists and resellers and does not sell direct to end consumers, providing UK-based technical support to professional installers.
Product overview
ThermoSphere is a UK-based manufacturer of electric heating products trading as a brand of Thermogroup Ltd. Its product portfolio centres on electric heating systems for residential and commercial applications, comprising three underfloor heating systems (Mesh for tile/stone, Membrane for tile/stone, and Foil for wood/carpet/vinyl), a complementary range of heating controls (T-MO thermostat, Dual Control thermostat, BT21 thermostat), electric boilers (Combi Boiler, Flow Boiler) for water and space heating, electric radiators and heaters (Oil Filled Radiators, Glass Panel Heaters, Convector Panel Heaters), bathroom products (Electric Towel Bars & Rails, Mirror Demisters), and accessories (insulation boards, underlay, overlay). Products are sold exclusively through approved stockists and installers, with no direct sales to end users.
Differentiator
Problem solved
Functional benefit
Products and services
- Electric Underfloor Heating Systems
Quantifiable outcome
- Up to 50% improved efficiency with insulation boards
- +2 more outcomes
Companies that use ThermoSphere
Customer profileNamed customers3 records
Segments3 records
Ideal customer profiles2 records
ThermoSphere technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
ThermoSphere partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core and minor.
- StoneBathwearcoreStoneBathwear is a bathroom pod manufacturer that worked with ThermoSphere on the One Nine Elms - City Towers project in London. They manufactured bathroom pods in Italy and specified ThermoSphere Mesh underfloor heating and towel warming products for all 667 bathrooms. The partnership involved close collaboration on product specifications including 7lm cold tails for easy thermostat connection.
- CP Hart ContractscoreCP Hart Contracts supplied the bathroom package for the One Nine Elms project and provided polished stainless steel towel bars from ThermoSphere as part of the installation. They represent a key channel partner distributing ThermoSphere bathroom products to major construction projects.
- R & F PropertiesminorClient for the One Nine Elms - City Towers development project. R & F Properties commissioned ThermoSphere products through the specification process involving architects and consultants for this 58-storey residential tower.
Scale indicators2 records
Recent moves6 records
Expansion highlights5 records
ThermoSphere competitors and assessment
Company assessmentDirect peers
- Heatmat: UK manufacturer of electric underfloor heating systems sold through trade channels. Direct competitor in the same electric UFH category and comparable installer-focused go-to-market.
- Warmup: UK-based manufacturer of electric and hydronic underfloor heating systems with a comparable installer-focused distribution model. Closest direct competitor to ThermoSphere in the British electric UFH market.
- Schlüter-Systems: Manufacturer of membrane underfloor heating systems (DITRA-HEAT) widely specified by tile installers in the UK. Competes with ThermoSphere Membrane in the tiled-floor UFH category.
- Polypipe Underfloor Heating: UK manufacturer of underfloor heating systems (hydronic and electric) sold through merchant and installer channels. Competes with ThermoSphere in UFH specification.
- JG Underfloor Heating (RWC): UK-based underfloor heating brand by Reliance Worldwide, offering both electric and water systems via trade distribution. Comparable electric UFH portfolio and installer channel.
- Flexel International: UK manufacturer of electric underfloor heating mats and foils with a parallel product architecture to ThermoSphere Mesh, Membrane, and Foil. Competes directly on the same installer specification.
Broad incumbents
- Danfoss (DEVI): Global heating division with the DEVI electric underfloor heating brand. Larger incumbent competing broadly across electric heating including UFH, with greater capital and geographic reach than ThermoSphere.
- NuHeat (Danfoss): North American electric underfloor heating brand owned by Danfoss. Comparable electric UFH product but broader incumbent with greater scale and access to capital.
- Grant UK: Established UK boiler manufacturer that has launched electric and hybrid heating products. Overlaps with ThermoSphere's electric combi and flow boiler positioning within a broader heating portfolio.
Emerging players
- Rointe: UK-present electric radiator and heating brand with Wi-Fi-connected products. Overlaps with ThermoSphere's panel heater and smart thermostat portfolio from a more consumer-direct positioning.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks6 records
Key highlights6 records
Customer concentration
ThermoSphere social profiles
Digital presenceThermoSphere financial estimates
Financial estimateRevenue estimate
Valuation estimate
ThermoSphere leadership team
Management profileNumber of profiles
ThermoSphere funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
ThermoSphere M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about ThermoSphere
What does ThermoSphere do?
ThermoSphere (trading as Thermogroup Ltd) is a UK-based British manufacturer of electric heating products, including electric underfloor heating systems (mesh, membrane, and foil), smart and programmable thermostats, electric boilers, electric radiators, towel warmers/bars, and mirror demisters. The company sells exclusively through approved stockists and resellers and does not sell direct to end consumers, providing UK-based technical support to professional installers.
Is ThermoSphere a public or private company?
ThermoSphere is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was ThermoSphere founded?
ThermoSphere was founded in 1999. It employs 11 to 50 people.
Where is ThermoSphere based?
ThermoSphere is headquartered in Tonbridge, United Kingdom, in the Europe region.
How does ThermoSphere make money?
One revenue line is on record: electric Heating Products.
Who are ThermoSphere's main competitors?
Direct peers on record are Heatmat, Warmup, Schlüter-Systems, Polypipe Underfloor Heating, JG Underfloor Heating (RWC) and Flexel International. Broad incumbents are Danfoss (DEVI), NuHeat (Danfoss) and Grant UK. Rointe is listed as an emerging player.
Does ThermoSphere have an API?
No public API is recorded for ThermoSphere.
What industry is ThermoSphere in?
ThermoSphere's product category is Electric Heating Equipment. Its primary akta.pro industry code is IMAHAKAC, Heat Exchangers & Thermal Transfer Equipment. Its NAICS code is 333414 and its SIC code is 3585.