Herz OZC 4.0

Herz OZC, developed by SANKOM Sp. z o.o., is a professional HVAC design tool for calculating building heat losses and sizing heating systems with accuracy and speed. Built for engineers, designers, and installers, it performs room-by-room heat load calculations and seasonal heat demand estimates, helping you select emitters and equipment, produce clear documentation, and deliver reliable, standards-aligned designs for residential and commercial projects.

Key features:

• Room-by-room heat loss and peak heat load calculations for sizing radiators and underfloor heating
• Building modeling with geometry, envelope assemblies, U-values, glazing, shading, thermal bridges, internal gains, ventilation, and infiltration
• Zone-based setpoints, schedules, and climate data for realistic operating scenarios
• Libraries of materials and constructions, with user-defined templates for faster workflows
• Configurable reports and printouts for clients, contractors, and authorities
• Tools that assist with selection and presetting of compatible HERZ components and emitters
• Support for widely used European calculation practices (e.g., EN 12831 methodologies) to promote consistent, standards-based design
• Quality checks that help catch data issues early and improve result reliability

By combining precise calculations with practical workflows and reporting, Herz OZC helps streamline heating system design, improve documentation quality, and support confident product selection and system sizing.

Herz OZC is developed by SANKOM Sp. z o.o.. The most popular version of this product among our users is 4.0. The name of the program executable file is Ozc.exe.