ENERGY CONSULTING · TECHNICAL BUILDING OPTIMISATION · HENNEF / NRW
Save Energy. Reduce Costs. Measurable.
Sustainari analyses, optimises and monitors your building systems — for Commercial & Industry as well as for Residential & Property Owners. With engineering expertise and measurable results.
Certifications & Qualifications
COMMERCIAL & INDUSTRY
For Companies & Commercial Properties
- ✓ SMEs, Industry, Logistics
- ✓ Commercial Real Estate & Hotels
- ✓ Housing Associations
- ✓ Municipalities & Public Buildings
- ✓ EDL-G Auditpflicht (250+ MA)
RESIDENTIAL & PROPERTY OWNERS
For Homeowners & Property Associations
- ✓ Single & Multi-Family Homes
- ✓ Property Owner Associations
- ✓ Energy Certificate & iSFP
- ✓ Renovation Planning & Funding
- ✓ BAFA EBW / KfW BEG
WHO WE ADVISE
Our Target Groups
From industrial companies and commercial properties to private property owners and homeowners.
Commercial Properties
Office & Retail
- →Office Buildings & Administration
- →Retail Areas & Shops
- →Shopping Centres
Industry & Production
Manufacturing & Logistics
- →Manufacturing Plants
- →Production Halls
- →Logistics & Storage
Hotels & Hospitality
Hotellerie & Freizeit
- →Hotels & Boarding Houses
- →Restaurants & Cafés
- →Leisure Facilities
Municipalities & Administration
Public Buildings
- →Town Halls & Authorities
- →Schools & Kindergartens
- →Public Institutions
Housing Associations
Property Management
- →Residential Complexes & HOA
- →Multi-Family Houses
- →Building Portfolio Optimisation
Private Homeowners
Residential & SFH
- →Single & Two-Family Homes
- →Energy Certificate & iSFP
- →Renovation Planning & Funding
OUR SERVICES
From Analysis to Continuous Monitoring
Energy Consulting for Businesses
Commercial & Industry — identify savings potential
Residential Energy Consulting
Renovation consulting, iSFP & funding
Energy Certificate
Demand & consumption certificate per GEG
Individual Renovation Roadmap (iSFP)
Individual renovation roadmap as per BEG
Energy Audit DIN EN 16247
Mandatory audit for 250+ employees
HVAC Optimisation
Heating, ventilation, air — hydraulic balancing
Energy Monitoring
Real-time consumption monitoring & ESG reporting
Funding Advisory
BAFA, BEG, KfW — complete application support
Building Automation
KNX / BACnet / GLT — smart & manufacturer-independent
up to 30%
2–4 Years
up to 35%
HOW WE WORK
Our Approach in 3 Steps
01
Analysis
02
Optimisation
Develop, prioritise and professionally implement measures.
03
Monitoring
WHY SUSTAINARI
Energy Efficiency with Technical Expertise
We analyse buildings, systems and consumption — data-driven and practical.
- Engineering Expertise
- Data-based Analysis
- Sustainable Optimisation
Energy Consulting in Your Region
Sustainari advises companies and property owners in the Cologne/Bonn area. On-site and in person — fast and straightforward.
- Hennef (Sieg)
- Bonn
- Cologne
- Siegburg
- Rhein-Sieg-Kreis
- NRW
FREQUENTLY ASKED QUESTIONS
Frequently Asked Questions
Professional energy consulting is worthwhile for companies with an annual consumption of approx. 50,000 kWh, commercial properties, industrial businesses, and housing associations. For companies with 250+ employees, an energy audit is legally required.
BAFA funds energy consulting for non-residential buildings by up to 80%. KfW and BEG fund individual measures and renovations. We check all funding options in advance and handle the application process.
The energy audit according to DIN EN 16247 is a standardised analysis legally required for non-SMEs. Energy consulting goes beyond this: individual action planning, ROI calculation, and funding optimisation.
1. Free Initial Consultation — Discuss goals and building needs. 2. On-site analysis and data collection. 3. Action plan with ROI calculation. 4. Implementation support and ongoing monitoring.