Heating & heat distribution
Consider boilers, heat pumps, radiators or underfloor heating together with hot water and controls.
TK SHK · BERLIN & BRANDENBURG
Heating, plumbing and air conditioning for single-family and multi-family homes in Berlin and Brandenburg. For private clients, developers, architects and general contractors.

BUILDING SERVICES AS ONE COORDINATED PROJECT
A spacious house, practice fit-out or several units: include your planned installations together in your enquiry. This helps coordinate pipe routes, connections and the order of work from the outset.
Consider boilers, heat pumps, radiators or underfloor heating together with hot water and controls.
Include bathrooms, toilets, staff facilities, drinking-water pipes, instantaneous water heaters and required gas connections in the agreed scope.
Plan air conditioning for new or remodelled rooms early: coordinate equipment positions, pipe routes, condensate drainage and electrical interfaces.
We coordinate interfaces with architecture, electrical and fit-out trades. The building-services scope, work stages and dates we undertake are set out in the project-specific offer.
INSPIRATION FOR YOUR PROJECT
AI-generated example images illustrate possible room and building settings typical of Berlin and Brandenburg. We plan the actual installation around your property.
We carry out the agreed building services installations: gas and water pipes, drainage, heat generation, hot water and heat distribution. Air conditioning is included as required.
We coordinate floor plans, plant areas and pipe routes with specialist designers and other trades. Electrical, building and finishing work are separately defined.
Gas pipework and water installations form part of the planning for new builds and major renovations. We clarify connections, routing and interfaces before installation.
We modernise central heating plants, central hot water systems and circulation in apartment buildings. Heat pumps and cascades are coordinated with heat demand, controls and hydraulic integration; radiators and underfloor heating are considered together.
Split and multi-split systems for offices, practices, shops and commercial premises: we coordinate occupancy, cooling load, equipment positions, pipe routes, condensate drainage and noise with the intended use.
We renew gas pipes throughout entire buildings and carry out complete gas installations and connections for apartment buildings and residential complexes in Berlin and Brandenburg. Pipe routing, sizing, internal distribution and work stages are coordinated for the building. We clarify the network connection and responsibilities with the relevant network operator.
NEW BUILD · COMPLETE RENOVATION · MODERNISATION
Are you planning building services for a new home, the modernisation of an apartment building or the fit-out of commercial space? Describe your entire plumbing, heating and air conditioning project. You can also submit extensive projects involving several buildings to TK SHK in Berlin-Lichtenrade for assessment. We use your documents to clarify whether individual installations or a coordinated package of services is suitable.
A new heating system, several heat pumps, radiators in different apartments, new instantaneous water heaters or air conditioning for several rooms: an overview by building, floor and unit makes coordination easier. Note which equipment should be newly installed, replaced or retained. For plumbing and gas installations, include new outlets, appliance connections and affected pipe sections. This helps us consider related work together in your enquiry.
Find details on Heating systems, Heat pumps, Gas boilers, Air conditioning and Plumbing installations.
Should apartments be worked on one after another, or should certain areas remain usable during alterations? Let us know the planned work stages, occupancy and possible access times. A central contact person helps for owners’ associations, property management and commercial premises. Also state which decisions have already been made and which approvals are still pending. This supports preparation of the quotation and work schedule.
For an initial assessment, the location, building type, number of units and planning stage are helpful. You can add existing floor plans, specifications and a list of the desired work. Mark any open questions and work to be carried out by other trades. A preferred start date and an existing budget range are useful optional details; a completed execution plan is not needed for the first contact. Scope, feasibility, capacity and dates are then coordinated for the specific project.
Send plans and specifications to service@tk-shk.com. A short project description in the enquiry form is also enough to get started.
TK SHK (TKSHK), owned by Tom Stefan Karg, is the Berlin specialist business behind karggas.de. We focus on new installations and replacements of heating, plumbing and air conditioning systems in Berlin and Brandenburg.
For a specific enquiry, tell us the property location, building type, the new installation you need or the existing system to be replaced, the number of units and your planned timeframe. Photos, rating plates and existing plans help us agree the details of your quotation.
TK SHK provides maintenance in Berlin and Brandenburg for private customers, property managers, owners’ associations, apartment buildings and businesses. We agree the systems, manufacturers, condition and maintenance needs in advance.
Heating: oil and gas heating, heat pumps and cascades, pellet boilers, solar thermal systems, central heating plants and hot water cylinders. Depending on the system, work includes cleaning, checks of burners, heat exchangers, pumps, controls and safety devices, measurements and a maintenance record.
Air conditioning and ventilation: split, multi-split and commercial systems and ventilation with heat recovery. Agreed work includes filter care, cleaning and checks of heat exchangers, fans, condensate drainage and operation. Required refrigerant checks are considered according to the system.
Plumbing and water systems: maintenance of drinking water filters, softeners, booster systems, circulation systems, sewage lifting units and backflow protection according to design and manufacturer requirements. Necessary hygiene examinations or specialist inspections are agreed separately.
Maintenance contracts for individual systems or property portfolios: we agree equipment lists, intervals, scope, appointments, access and records. Repairs, spare and wear parts and additional call-outs are expressly defined in the quotation. For apartment buildings and businesses we coordinate visits with management and occupants.
Assess existing conditions and needs: building, usage, existing equipment and desired scope.
Define the work: jointly agree design, interfaces, construction stages and necessary interruptions.
Coordinate implementation: quotation, dates, installation, testing and handover to suit the agreed contract.
We clarify capacity, technical feasibility and dates for each project. We do not promise a complete building renovation beyond the agreed building services scope.
We carry out the tests, commissioning and documentation required for the agreed installation work, according to the system, scope, technical rules and manufacturer requirements.
Depending on the work, we perform load and tightness tests and serviceability checks on existing gas pipes under DVGW-TRGI. Gas boiler commissioning includes the necessary connection, function and safety checks. Results and operator instruction are documented.
Pressure and tightness testing of drinking water installations under DIN EN 806-4 and applicable ZVSHK rules, using an appropriate method, followed by flushing, commissioning and records. For wastewater pipes, we check operation and connections and agree any necessary tightness testing for the system.
Pressure and tightness testing, flushing, filling and venting of the heating system being worked on. We consider water quality under VDI 2035 and manufacturer requirements, check operation and controls and document commissioning. Hydraulic balancing and adjustment depend on the agreed work.
Depending on the system, commissioning includes tightness testing, refrigerant circuit evacuation, condensate drainage and function checks. Required leak checks and records depend on refrigerant, charge and applicable F-gas rules. Refrigerant work is carried out with the required qualifications.
You receive the test and commissioning records for the work performed and operating instructions. We coordinate necessary approvals by network operators, chimney sweeps or other responsible bodies; their duties remain with them. Additional hygiene examinations or special tests are agreed for each project.
Good to know
Ideally before floor plans, shafts and installation zones are finalised. This allows equipment locations, pipe routes and coordination with other trades to be considered early.
Floor plans, a brief description of the building project, your preferred timeframe and existing planning documents are helpful. Please also state the intended uses and which plumbing, heating or air conditioning work is needed.

The right solution starts with a conversation.
Send specifications, floor plans or existing planning documents to our established email address. Please include the location, building type, quantities and preferred timeframe.
Living spaces viewed together






Plumbing details in an interior fit-out






Fittings for modern living spaces
















Based on 6 reviews
Six Google reviews: five with text and one rating given only as stars, without text.
Review information as of: · Links open Google.
Five translated reviews and one rating given as stars without text
Heat pump installation
Translated from German
“I had TK SHK install a heat pump and I am really very satisfied. Everything went very well, from the initial consultation to completion. The work was carried out cleanly, punctually and very carefully. Questions were always addressed and everything was explained clearly. You can tell that they have expertise and experience. The heat pump works perfectly and I would hire TK SHK again at any time. Highly recommended!”
„Ich habe von TK SHK eine Wärmepumpe einbauen lassen und bin wirklich sehr zufrieden.
Von der ersten Beratung bis zur Fertigstellung hat alles super funktioniert. Die Arbeiten wurden sauber, pünktlich und sehr ordentlich ausgeführt.
Auf Fragen wurde immer eingegangen und alles verständlich erklärt. Man merkt, dass hier Fachwissen und Erfahrung vorhanden sind. Die Wärmepumpe läuft einwandfrei und ich würde TK SHK jederzeit wieder beauftragen. Klare Empfehlung!“
Original customer review on Google, in German
View the original on GoogleHeating replacement
Translated from German
“Excellent service, the heating systems were replaced quickly, and the price was exactly as agreed beforehand.”
„Bester Services, Heizungen wurden schnell gewechselt, Preis genauso wie vorher vereinbart.“
Original customer review on Google, in German
View the original on Googlegas boiler replacement
Translated from German
“I had my old gas boiler replaced with a new combi boiler and I am really happy. An appointment was arranged quickly and installation went smoothly. The old boiler was removed and the new one installed straight away. The heating and hot water work perfectly again, and everything was left clean. The price was also as discussed beforehand. I can definitely recommend them 👍”
„Habe meine alte Gastherme gegen eine neue Kombitherme austauschen lassen und bin echt zufrieden Termin wurde schnell gemacht und der Einbau hat ohne Probleme geklappt die alte Therme wurde ausgebaut und die neue direkt eingebaut Heizung und Warmwasser funktionieren wieder einwandfrei und alles wurde sauber hinterlassen Preis war auch wie vorher besprochen kann ich auf jeden Fall weiterempfehlen👍“
Original customer review on Google, in German
View the original on GoogleRating without text
View the original on GoogleTranslated from German
“Good work, no complaints”
„Gute Arbeit, kann mich nicht beklagen“
Original customer review on Google, in German
View the original on GoogleTranslated from German
“Good service”
„Guter Service“
Original customer review on Google, in German
View the original on GoogleSource: Google · As of 18 October 2026 · Translations with the original German text; one rating without text.
We compare the Google reviews shown here with our own customer jobs to check whether they relate to services we actually provided.