Skorstensbolaget i Stockholm AB

What Skorstensbolaget i Stockholm AB does

Skorstensbolaget i Stockholm AB is a third-generation Swedish family-owned specialty contractor, founded in 1979 and headquartered in Vallentuna in the Stockholm metropolitan area. The company focuses on chimney renovation, ventilation upgrades, and heat-recovery installations in older residential buildings — primarily Swedish housing cooperatives (bostadsrättsföreningar, BRF), of which it has served over 400, alongside government and private property owners and individual villa owners. Landmark references include Kungliga Slottet (Royal Palace of Sweden), Riksbyggen's Project Relur (~500 apartments in Linköping), Brf Trumspelaren (627 apartments in three city blocks), Brf Råsunda Torg (75 tiled-stove channels renovated in 2004), and the Canadian Embassy in Stockholm.

The product platform centres on two proprietary technology families. The SafeSeal line (FTX, FX, SX, RX, TNT) uses patented expanding ceramics inserted from the chimney top without drilling through apartments; the ceramic integrates with the building's structural mass rather than acting as an insulating insert like competing composite or metal pipe systems, and a 25-year warranty is offered on SafeSeal FTX. CleanAir24 FTX is a three-stage heat-recovery ventilation system installed inside existing chimney channels: a primary heat exchanger, a counterflow heat exchanger, and the building's heavy structural mass itself as a thermal storage stage. Independent measurement by Lund University at the Royal Palace recorded 47% heat recovery over two heating seasons; BeBo and the Swedish Energy Agency recorded 30–40% in standard installations. Kök24, a patented kitchen-ventilation conversion, and CleanAir24 FX (radon control) round out the offering, with supporting services for OVK (mandatory ventilation) inspections, radon remediation, tile-stove renovation, roof safety, and fireplace installation.

Revenue is generated primarily through project-based renovation contracts, with pricing determined per quote after a free on-site inspection valued at 7,500 kr, supplemented by recurring OVK inspection and filter-replacement service contracts (multi-year). Headcount is approximately 15 trained technicians, the company has completed more than 4,500 projects in its history with claimed zero complaints, and Byggaranti (Swedish construction warranty) plus the SafeSeal FTX 25-year warranty are standard. Go-to-market is direct enterprise field sales led by the Vinberg family — CEO Carl-Henrik Vinberg and sales/project manager Gabriel Vinberg — with no resellers or channel partners. In 2024 the company joined the Utilitas corporate group, which it cites as the platform for scaling its energy-efficient solutions to housing associations nationally. No external investors, funding rounds, or revenue figures have been disclosed.

Name

Skorstensbolaget i Stockholm AB

Legal name

Skorstensbolaget i Stockholm AB

Website

https://skorstensbolaget.se

Company type

Private

Founded year

1979

Operating status

Operating

Short description

Skorstensbolaget i Stockholm AB is a third-generation Swedish family-owned contractor (founded 1979, ~15 employees) that renovates chimneys and installs proprietary heat-recovery ventilation (SafeSeal, CleanAir24) in older multi-family buildings, serving housing associations, government, and private property owners across Sweden.

Ownership category

akta.pro rank

Product category

Ventilation and Chimney Renovation Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (23822)

akta.pro primary industry

Chimney Masonry Repair (Crown, Tuckpointing, Brick) (HSAGALAK)

akta.pro secondary industries

Roof Ventilation & Attic Venting Upgrades (HSAPAKAI), Chimney Repair & Restoration (Masonry/Crown/Chase) (HSAEANAC), HVAC System Replacement & Change-Outs (HSAOAGAB)

Keywords

• Chimney renovation services
• Ventilation channel relining
• Heat recovery ventilation
• Radon remediation services
• Fireplace installation services

Headquarters

HQ city

Vallentuna

HQ country

Sweden

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Supply Chain

Revenue model

1. Project-based renovation services: One-time project revenue from chimney renovation, channel renovation, fireplace installation, radon remediation, and roof safety services. Pricing is quote-based, determined by property size, project complexity, and chosen method. Projects range from single-day chimney crown repairs to multi-week multi-dwelling renovations.
2. Maintenance and service agreements: Ongoing maintenance and service relationships with housing associations and property owners following completed renovation projects. Recurring service revenue from OVK inspection services and filter replacement for CleanAir24 systems.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Skorstensbolaget i Stockholm AB provides chimney and ventilation channel renovation services for older Swedish buildings using its proprietary SafeSeal expanding ceramics relining method, which integrates directly with the building's structural mass to enable heat recovery. The company installs its CleanAir24 FTX heat recovery ventilation system, conducts OVK obligatory ventilation inspections, performs radon remediation, renovates tiled stoves (kakelugnar), and installs fireplaces and roof safety equipment, primarily for housing associations, property owners, and individual homeowners across Sweden.

Product overview

Skorstensbolaget i Stockholm AB offers a comprehensive suite of ventilation, chimney renovation, and energy recovery products and services for residential and commercial properties. The core product portfolio centers on the SafeSeal channel renovation system (FTX, FX, SX, and RX variants) and CleanAir24 ventilation systems (FTX and FX), which work together to provide heat recovery and improved indoor air quality in buildings with natural draft ventilation. Supporting services include OVK inspections, radon remediation, roof safety, and fireplace/kakelugn renovation. The products are designed as an integrated system where SafeSeal renovation prepares channels for CleanAir24 heat recovery installation, enabling buildings to recover 30-40% of heating costs while meeting modern ventilation standards.

Differentiator

Problem solved

Functional benefit

Brands

• SafeSeal FTX: Channel renovation method for self-draught buildings that also enables 30–40% heat recovery and future CleanAir24 FTX installation.
• SafeSeal FX
• SafeSeal SX
• SafeSeal RX
• SafeSeal TNT
• CleanAir24 FTX
• CleanAir24 FX
• Kök24
• EcoHeat

Products and services

• CleanAir24 FTX Three-stage heat recovery ventilation (FTX) system installed inside existing chimney channels of natural-draft buildings, recovering 30–40% of heating costs while providing filtered, tempered fresh air year-round using the building's thermal mass as an energy reservoir. Targeted at Swedish housing associations, property owners, and homeowners.
• CleanAir24 FX

Quantifiable outcome

• Heat recovery rate: 30–47% of heating costs in self-drag buildings
• +4 more outcomes

Named customers7 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

Feature5 records

Partnerships

One partnership is on record.

• Utilitas GroupcoreOthersSkorstensbolaget recently became part of the Utilitas Group of companies. The company hopes this affiliation will enable housing associations throughout Sweden to gain access to the company's energy-efficient solutions and improved indoor climate through heat recovery. Utilitas is a Swedish group of companies operating in the energy efficiency and building services sector.

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Nibe: Swedish heating solutions group including Nibe Energy Systems (heat pumps) and Nibe Stoves (fireplaces/tile stoves). Comparable to Skorstensbolaget in serving Swedish property owners seeking energy-efficient heating and fireplace/stove upgrades, but competing more on replacement heating systems than on chimney-channel heat recovery.
• Caverion: Nordic-headquartered provider of building solutions across HVAC, ventilation, and energy efficiency retrofits for commercial and residential properties. Comparable in addressing Swedish building-energy and indoor-air-quality demand and serving similar institutional and BRF customers, but at much broader portfolio and geographic scale.
• Assemblin: Large Nordic technical installation contractor serving HVAC, ventilation, electrical and plumbing markets in Sweden and Norway. Comparable as a Swedish HVAC/ventilation installation player addressing the same BRF and property-owner customer base, but operating across the full technical installations spectrum rather than chimney-specific heat recovery.
• Swegon: Swedish ventilation and indoor climate solutions manufacturer focused on energy-efficient air distribution and heat recovery. Comparable as a Swedish energy-efficiency ventilation player addressing overlapping demand drivers (heat recovery, indoor climate), but operating as an equipment OEM rather than a chimney-channel renovation contractor.
• Systemair: Swedish-headquartered manufacturer and supplier of ventilation and indoor climate solutions (fans, air handling units, FTX systems). Comparable as a Swedish ventilation player serving the energy-efficiency retrofit market that drives Skorstensbolaget's demand, but on the equipment manufacturer side rather than installed services.
• Bravida: Leading Nordic multi-technical installation and facility services contractor covering HVAC, ventilation, electrical and plumbing across the Nordics. Comparable to Skorstensbolaget as an installation-focused service provider addressing building ventilation and energy retrofit demand, but operating at vastly larger scale and broader scope without specialization in chimney channel renovation.
• FläktGroup: European indoor air and climate solutions manufacturer offering ventilation, air handling, and heat recovery equipment across commercial and residential segments. Comparable as a European incumbent addressing indoor-air-quality and heat-recovery retrofits in older buildings, but at OEM/portfolio scale rather than focused installed services.
• Lindab: Swedish building products company with a substantial ventilation and indoor climate division producing ductwork, FTX units, and air handling equipment. Comparable as a Swedish incumbent in building ventilation serving the same renovation-driven demand pool, but as a component supplier rather than a renovation/installation specialist.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Skorstensbolaget i Stockholm AB