Services
Energy sector
Energy Renovation
Energy renovation includes measures aimed at improving the thermal insulation of buildings, modernizing heating and cooling systems, and reducing energy consumption. These improvements can be co-financed through EU funds and apply to various types of buildings – residential, commercial, industrial, public and community, religious, infrastructure, tourism, agricultural, and others.
Reduced heating and cooling costs, greater living and working comfort, increased property value, and a contribution to environmental protection are just some of the benefits property owners gain after energy renovation.
What We Offer
Energy audit, energy certificate, and consulting
A detailed analysis of the building’s current condition (facade, joinery, roof, heating/cooling systems, energy consumption)
Issuance of energy certificate before and after energy renovation
Proposed measures to improve energy efficiency
Return on investment assessment
Preparation of project documentation for energy renovation
Development of the energy renovation project (main design and cost estimate)
Proposal of specific measures (e.g. thermal insulation, window and door replacement, solar panels, heat pumps…)
Compliance with co-financing requirements (for applications to EU funding calls)
Professional supervision of energy renovation works
Monitoring of work compliance with the project
Monitoring of construction progress and phases
Keeping the construction log and documentation
Control of billing and progress reports
Energy audit of a large enterprise
An energy audit of a large enterprise is a detailed analysis of energy consumption within a business system, aimed at identifying inefficiencies and providing recommendations to improve energy efficiency. For large enterprises in the EU (including Croatia), such an audit is legally required every four years, unless the company has an established energy management system (e.g. ISO 50001).
Preparation of project proposals for funding applications
Preparation of complete application documentation (forms, statements, attachments)
Preparation of the cost-effectiveness study and application form
Alignment of the project with the criteria of the call (Environmental Protection and Energy Efficiency Fund, NRRP, EU funds)
Preparation of required permits and conditions (if needed)
Project management and administration
Consulting and guidance throughout the entire process
Coordination with public authorities
Assistance in communication with funding bodies and in responding to inquiries
Preparation and implementation of public procurement
Energy Certification
The energy certification service includes the issuance of an official document – the energy certificate – which assesses the energy efficiency of a building or a part of it (e.g. an apartment or commercial space). The certificate is legally required when selling, renting, or constructing a property, and is often necessary for energy renovation and co-financing applications.
What We Offer
We are authorized by the Ministry of Construction and Physical Planning to conduct energy audits and energy certification for buildings with both simple and complex technical systems. To date, we have issued over 5,000 energy certificates for various types of buildings, including public facilities, multi-residential buildings, hotels, family houses, and commercial premises.
What are the steps to issue a building energy certificate?
Data collection
Information about the location, year of construction, type of building, and energy consumption (provided by the client)
Documentation (construction drawings, floor plans, sections, specifications of heating/cooling systems)
On-site measurement and recording of the actual condition
On-site inspection and examination of the building
Inspection of the building envelope (facade, roof, floor, windows, and doors)
Analysis of existing installations (heating, cooling, ventilation, hot water)
Verification of energy consumption (bills, systems, insulation)
Calculation of energy class
Computerized calculation of energy consumption according to applicable standards (e.g., HRN EN ISO 13790)
Determination of the energy class (from A+ to G)
Comparison of consumption with reference values
Issuance of the energy certificate
Official document with calculation results
Information about the building, energy class, consumption, and recommendations for improvement
The certificate is valid for 10 years (unless significant changes are made to the building).
Recommendations for improvement
Not mandatory in all cases, but often included:
Proposals for improving energy efficiency
Guidelines for potential energy renovation
Energy audit of a large enterprise
An energy audit of a large enterprise is a detailed analysis of energy consumption within a business system, aimed at identifying inefficiencies and providing recommendations to improve energy efficiency. For large enterprises in the EU (including Croatia), such an audit is legally required every four years, unless the company has an established energy management system (e.g. ISO 50001).
What We Offer
Currently, only a few companies in the Republic of Croatia are authorized to perform this work. Alfa Engineering, with its expert team, holds authorization to conduct energy audits for large enterprises. Our engineers were among the first in Croatia to complete professional training and obtain certification from the Ministry of Spatial Planning, Construction, and State Property to provide this service.
What are the steps for conducting an energy audit of a large enterprise?
Preparation and data collection
Review of the company’s structure, processes, and energy consumers
Analysis of consumption data (electricity, gas, water, fuel) for previous years
Inventory of buildings, machinery, production lines, vehicles, IT systems, etc.
On-site inspection and analysis
Detailed inspection of facilities and equipment
Measurements (as needed) – temperature, consumption, heat losses, emissions
Identification of inefficient systems (heating, cooling, lighting, compressed air, motors)
Energy calculations and comparisons
Computer processing of data and consumption analysis by categories
Comparison with standards, norms, or similar companies in the industry
Calculation of energy efficiency indicators (e.g., kWh per production unit)
Recommendations for improvement measures
Specific proposals for savings (equipment modernization, automation, renewable energy sources, management systems)
Cost analysis – investment versus expected savings
Ranking of measures according to cost-effectiveness and return on investment (ROI)
Energy audit report
A structured document containing all analyses, conclusions, and recommendations
Legally compliant with the Energy Audit Regulation
Can serve as a basis for applying to EU funding programs or implementing the ISO 50001 system
