Guide to heating technology, storage, solar, spare parts and system technology
In the GEMA Shop you will find technical products for heating, storage technology, solar, air conditioning and water technology, fireplaces, system technology and spare parts. This guide helps you to better classify important product groups, understand typical selection criteria and find the right area in the shop more quickly.
Technical products need orientation.
Many products must match the building, system, manufacturer, model, performance, connection data or area of application. Use this guide as a starting point and ask us before ordering if you are unsure about selection, compatibility or spare parts.
Heating guide: find the right heating technology
The choice of a heating system depends not only on the price. The building, heat demand, fuel, existing system, space conditions, exhaust system, storage integration and later operation are important.
Understanding wood boilers
Wood gasification boilers, natural draft boilers, solid fuel boilers and coal gasifiers differ in combustion technology, operating comfort, efficiency, buffer storage requirement and area of application.
- Check rated output and output class
- Pay attention to log length and fuel
- Coordinate buffer storage and chimney
Selecting pellet boilers
Pellet boilers are suitable for automated operation with storable fuel. Decisive points are performance, pellet storage, cleaning, ignition system, control and system integration.
- Choose performance to match the building
- Plan pellet storage and conveying system
- Compare automatic functions
Correctly classifying heat pumps
For heat pumps, heating output, heat pump type, flow temperature, sound values, refrigerant, hot water preparation and building suitability are particularly important.
- Check heating output and area of application
- Pay attention to sound power level and installation location
- Consider hot water and storage
Understanding combination boilers
Combination boilers combine several fuel or operating modes. This increases flexibility, while storage, control, buffer storage and operation must be carefully coordinated.
- Check fuel combination
- Dimension buffer storage appropriately
- Pay attention to operating and maintenance effort
Complete packages: useful when system components should fit together
Complete packages can simplify product selection because multiple components are combined into one system offer. Nevertheless, performance, storage size, area of application, building, installation conditions, and existing system should be checked.
- Heat pump complete packages for coordinated system solutions
- Wood heating and pellet heating complete packages with matching peripherals
- Solar thermal and photovoltaic complete packages for energy and system technology
- Fireplace and surface heating complete packages for special applications
A complete package does not replace a professional on-site inspection. Especially with heating technology, heat load, hydraulics, installation location, chimney, storage tank, and installation conditions must be taken into account.
View complete packagesNo blanket funding commitment
Whether a system is eligible for funding depends on the product, system, building, application, and the currently applicable funding conditions. Always check funding options before purchase and implementation.
Advantage for customers
Complete packages help find suitable components faster. For technical safety, checking the specific installation situation remains crucial.
Guide to storage technology: buffer tanks, hygienic storage tanks, and hot water tanks
Storage technology is a central component of many heating systems. The selection depends on the heat generator, volume, drinking water demand, heat exchanger, insulation, temperature range, and integration into the overall system.
Buffer tanks
Buffer tanks absorb heat and release it with a time delay. They are especially important for wood heating, solar thermal, and many mixed heating systems.
- Choose volume to match the system
- Consider heat generator and heating circuits
- Check insulation and temperature range
Hygienic storage tanks
Hygienic storage tanks combine buffer tank function with hygienic drinking water preparation via a suitable system, for example using fresh water technology or internal heat exchangers.
- Pay attention to drinking water demand
- Check heat exchanger and system type
- Coordinate integration into heating system
Hot water tanks
Hot water tanks serve to store domestic hot water. Storage volume, connection type, heat exchanger, insulation, temperature range, and use with the existing heat generator are important.
- Assess household size and consumption
- Check heat exchanger and connection
- Clarify compatibility with heat generator
Heat pump storage tanks
Heat pump storage tanks must match the heat pump, the temperature level, the hot water preparation, and the planned system concept.
- Check heat pump suitability
- Pay attention to volume and temperature range
- Compare system connections
Guide to solar thermal and photovoltaics
Solar thermal and photovoltaics pursue different goals. Solar thermal supports heat generation, photovoltaics generates electricity. Both areas must be planned to match the building, consumption, storage, roof area, and system technology.
Collectors & Solar Accessories
Solar thermal can supplement domestic hot water preparation or heating support. Relevant are collector type, collector area, storage connection, solar station, control, and installation environment.
- Check collector area and storage
- Consider solar station and control
- Coordinate hydraulic integration
PV Modules and Inverters
For photovoltaics, module output, inverter type, system design, mounting system, and possible storage integration are decisive. The components must be technically compatible.
- Consider module output and roof area
- Select the right inverter
- Plan mounting system and wiring
Guide to Climate & Water Technology
Climate and water technology includes air conditioning systems, climate accessories, water treatment, sanitary technology, and swimming pool accessories. Decisive are application area, connection conditions, water quality, performance, and technical compatibility.
Air Conditioning Systems
For air conditioning systems, cooling capacity, unit type, room size, energy efficiency, sound levels, installation effort, and accessories are important. Installation should be carried out professionally.
- Choose cooling capacity to match room size
- Coordinate indoor and outdoor units
- Check installation and connection conditions
Water Treatment
Water filters, water softeners, dosing systems, or reverse osmosis systems must match water quality, application, connection size, flow rate, and maintenance.
- Consider water analysis and intended use
- Check flow rate and connection
- Consider maintenance and spare parts
Guide to Heating Accessories & System Technology
System technology often determines whether a system functions properly. Pump groups, return temperature boosters, control technology, fittings, flue pipes, chimneys, heating elements, and circulation pumps should be selected according to technical suitability.
Pump Groups & Return Temperature Boosters
Hydraulic components must match performance, flow rate, temperature, connection size, heat generator, and system concept.
- Check connection size and pump performance
- Consider temperature range
- Consider hydraulic schematic
Control Technology
Controllers, sensors, and controls must match the system, the heat generator, and existing components. Especially for replacement or expansion, precise model assignment is important.
- Check manufacturer and model series
- Coordinate sensors, probes, and control
- Observe documentation
Spare parts: not just selected by appearance
For spare parts, manufacturer, model series, article number, type plate, series, technical design, and compatibility are decisive. Visually similar parts can be technically different.
- Have the rating plate and model designation ready
- Check the item number, MPN, or EAN
- Send photos of the component and the unit
- Involve a specialist company for safety-relevant parts
Send us the manufacturer, model, rating plate, and photos. We will check whether a suitable spare part or an appropriate alternative is available.
Request spare partBuying advice: what to look out for before ordering
Many technical products must match the system, the building, and existing components. These questions help avoid typical wrong purchases.
What information do I need for heating advice?
Helpful information includes building type, living space, insulation standard, existing heat generator, desired fuel, existing storage tank, chimney or flue gas situation, hot water demand, and desired area of application.
Can I simply select the heating output based on living space?
Living space alone is not sufficient for a safe selection. Output specifications serve only as a guide. For a professional design, heating load, insulation standard, hot water demand, user behavior, and system configuration should be taken into account.
What does "eligible for funding" mean in the shop?
Funding notes serve only as a guide. Whether funding is possible in a specific case depends on the product, system, building, application, and the respective valid funding conditions.
When should I contact you before ordering?
Contact us before ordering if you are unsure whether a product fits, if it concerns spare parts without a clear item number, if several components are to be combined, or if a larger quantity is planned.
Quick start to the most important shop areas
These areas form the central orientation in the GEMA Shop. The detailed selection is then made via categories, search, and filters.
Heating systems
Heat pumps, pellet boilers, wood boilers, combination boilers, gas condensing units, and electric boilers.
View heating systemsComplete packages
System solutions for heat pumps, wood heating, pellet heating, solar thermal, photovoltaics, and other applications.
View complete packagesStorage technology
Buffer tanks, combination tanks, hygienic tanks, hot water tanks, heat pump tanks, and solar tanks.
View storage technologySolar technology
Collectors, solar accessories, PV modules, inverters, and PV accessories.
View solar technologyHeating accessories & system technology
Control technology, pump groups, return temperature boosters, fittings, heating elements, circulation pumps, and system components.
View system technologySpare parts
Manufacturer-related spare parts and technical components for heating, combustion, control, and system technology.
View spare partsDo you need support with the selection?
Write to us about which product or system you are looking for. For technical questions, item numbers, product links, photos, rating plates, existing documents, and information about the area of application are helpful.