
Building services engineering: heating, plumbing, solar, ventilation and air conditioning – consulting, planning and installation from a single source

Marcos Guisy GmbH
66839 Schmelz (Hoher Staden industrial estate) · DENew on Amplifa
About Guisy
Marcos Guisy GmbH is a building services company from Schmelz in the Saarland that has been planning, supplying and installing heating, plumbing, ventilation, air conditioning and environmental technology since 1976. Its range of services includes heat pumps for water, brine and air, oil, gas, condensing and pellet boilers, solar systems with flat-plate and vacuum-tube collectors, photovoltaics, underfloor heating, radiators, supply and extract ventilation systems, chimney refurbishments, piping systems in copper, plastic and stainless steel, plumbing pre-installations, and rainwater harvesting and greywater recycling systems. For the heating sector, the company offers pre-fabricated Silver-Line heating technology sets from German brand manufacturers. Its customers include private individuals, architects, property developers, prefabricated house manufacturers as well as commercial and industrial facilities, including industrial plants of Pilkington in Schmelz and an administrative building of Pregel in Munich. The team consists of master gas and plumbing installers as well as master heating and ventilation engineers; the company is run by owner Marcos Guisy.
- Site
- Schmelz
- Processes
- Supply and installation of heat pumps (water, brine, air), Supply and installation of oil, gas, condensing and pellet boilers, Solar systems with flat-plate and vacuum-tube collectors, Photovoltaic systems, Underfloor heating and floor heating, Heating panels, tubular and designer radiators, Room supply and extract ventilation systems and exhaust air technology, Chimney refurbishments and stainless steel external chimneys
- Materials
- Copper, Plastic, Stainless steel, SML pipe, SML pipe (cast iron)
- Certificates
- Energy consultant for buildings in the trades, Electrical skilled worker for defined tasks, Responsible person under the Water Resources Act, SGS-TÜV certified specialist planner for age-appropriate bathrooms, SGS-TÜV specialist planner for age-appropriate bathrooms, Responsible person under WHG
- Founded
- 1976
- Industries
- Residential construction (single- and multi-family houses), Property developers, Prefabricated house construction, Architecture and planning, Industrial plants, Commercial properties
- 01
Consulting and energy consulting
- 02
Planning and calculations according to DIN standards
- 03
Delivery of system components
- 04
Installation by skilled personnel
- 05
Commissioning, system maintenance and customer service
Materials and systems
Copper
Piping system installation for heating and drinking water networks.
Plastic
Piping systems for heating and plumbing installations.
Stainless steel
External chimneys, pipework and refrigerant lines with high resistance.
SML pipe (cast iron)
Industrial hall roof drainage systems.
Site

Schmelz
DEHead office, Hoher Staden industrial estate
- Materials
- Copper, plastic, stainless steel, SML pipe
Components and systems




Inside the production




Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Supply and installation of heat pumps (water, brine, air)Installation | – | – | – | – | – |
| Supply and installation of oil, gas, condensing and pellet boilersInstallation | – | – | – | – | – |
| Solar systems with flat-plate and vacuum-tube collectorsInstallation | – | – | – | – | – |
| Photovoltaic systemsInstallation | – | – | – | – | – |
| Underfloor heating and floor heatingInstallation | – | – | – | – | – |
| Heating panels, tubular and designer radiatorsInstallation | – | – | – | – | – |
| Room supply and extract ventilation systems and exhaust air technologyInstallation | – | – | – | – | – |
| Chimney refurbishments and stainless steel external chimneysInstallation | – | – | – | – | Stainless steel |
| Piping system installation in copper, plastic and stainless steelInstallation | – | – | – | – | Copper, Plastic, Stainless steel |
| Plumbing pre-installations of all common systemsInstallation | – | – | – | – | – |
| Rainwater harvesting and water recycling systemsInstallation | – | – | – | – | – |
| Greywater recycling systemsInstallation | – | – | – | – | – |
| Air conditioning systems / air conditioningInstallation | – | – | – | – | – |
| Wall and ceiling cooling as passive systemInstallation | – | – | – | – | – |
| Controlled residential ventilation with heat recovery / earth collectorInstallation | – | – | – | – | – |
| Water softening systemsInstallation | – | – | – | – | – |
| Drinking water supply lines in large dimensionsInstallation | – | – | – | – | – |
| Construction of heat recovery and degassing systems (industrial)Installation | – | – | – | – | – |
| Installation | – | – | – | – | Stainless steel, SML pipe (cast iron) |
| Compressed air linesInstallation | – | – | – | – | – |
| Fire protection technologyInstallation | – | – | – | – | – |
| Engineering | – | – | – | – | – |
| Service services, system maintenance and customer serviceInstallation | – | – | – | – | – |
Additional services
Reference customers
Quality and qualifications
The building services are installed by continuously trained skilled personnel and supervised on site by master craftsmen and technicians. Certifications include energy consultant for buildings in the trades, electrical skilled worker for defined tasks, responsible person under the Water Resources Act, and SGS-TÜV-certified specialist planner for age-appropriate bathrooms.
| Evidence | Schmelz |
|---|---|
| Energy consultant for buildings in the trades | |
| SGS-TÜV specialist planner for age-appropriate bathrooms | |
| Electrical skilled worker for defined tasks | |
| Responsible person under WHG |
History
- 1976
Start of company operations – "Since 1976 our name has stood for innovative building services".