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HtCad - Main characteristics

The product is certificato dal CTI per l'applicazione delle specifiche tecniche UNITS 11300 parti 1, 2, 3, 4, 5, 6.
The program implements forwards as required by the following decrees:

  • D.M. 06/26/2015 or minimum requirements
  • Lombardy Region - D.G.R. 3868 of 07/17/2015
  • Emilia Romagna Region - D.G.R. 967 of 07/20/2015
  • Autonomous Province of Trento - D.P.P. n. 11-13/Leg of 07/13/2009

Attainment of the qualifying title

Reports shall be prepared for the following categories of interventions:

  • New projects and expansions of existing buildings
  • Important Level I restructuring
  • Important Level II restructuring
  • Upgrading energy

Thermal and energy calculations

  • Calculating the system yield and the primary energy demand within ASHRAE specifications
  • Thermal transmittance calculation of any structure and opaque glass windows horizontally and vertically in accordance with the standards
  • Check ASHRAE for the summer minimum calculation of the walls
  • Inspection of the surface and interstitial condensation of structures according to UNI EN ISO 13788:2013
  • Calculation of winter heat losses with dispersants structures statistical overview (UNI EN 12831:2006)
  • Air handling units sizing for thermal ventilation systems with primary energy demand calculation for the service of ventilation and energy losses in both conduit systems, both in heat transfer fluid distribution systems
  • Calculating the electricity produced by the photovoltaic (ASHRAE)
  • Profitability calculation of the recovery operations with the determination of: NPV, IRR, and Tra
  • Guidance system for the graphical input enforcement via a browser that allows you to run the project in sequential order
  • Quickly and accurately graphical input with automatic three-dimensional modeling
  • Automatic detection of thermal bridges and implementation schedule of thermal bridges enforced by CESTEC SPA, ANCE Lombardy and the Politecnico di Milano
  • Automatic detection of thermal bridges and exchanging borders
  • Archive materials compiled according to UNI EN ISO 10456:2008, UNI EN ISO 10351:2015, and fully customizable
  • Verification of law compliance with rapid setting of unmet checks
  • Control of errors and warnings on tabular and positioning input through the navigator on the field and concerned form
  • Dynamic labels summary of all the romms characteristics
  • Generating summary legends, Windows, and custom print layouts
  • Production of calculation reports and the technical report in RTF format
  • Costs summary of the calculation results
  • Ability to export drawings
  • Preparing the APE (Energy Performance Certificate)

Solar thermal

  • Collector array sizing calculation (F-CHART method and conforms to UNI 8477)
  • Check the performance of an existing collector field (ASHRAE)
  • Subsystem calculations are intended only for the production of domestic hot water (DHW), the sole production of heating, and combined systems
  • Defining the ACS requirements according to ASHRAE technical specification
  • Covered demand fraction by solar energy is calculated with reference to the users needs and with reference to the primary energy needs, combined with the facility to fuel-powered generators or heat pumps
  • Project management through a wizard in sequential windows
  • Calculation method to preset schemes or system components manual selection
  • Pre-built and customizable database for solar collectors, storage tank, generators, and piping
  • Cost/benefit economic analysis
  • Determination of the project's most important economic indicators (NPV, RI,TRa) related to the installation costs, electricity and fuel, maintenance, financial costs, and gross tax deductions the tax on interest and for redevelopment energy (Budget 2007)
  • Print of the project's technical and economic report in RTF format
  • Reading the heating requirements for heating and/or domestic hot water: The Law 10 release and the project ENERGY PLATE report with and without integrated solar reflecting the overall energy improvement


  • Design and sizing networks
    • Thermal heating and cooling (for cooling the Carterm module is required)
    • Plumbing and sanitation
    • Winter heat losses, verification of Law 10/91, water heating systems, and radiant floor and wall, plumbing systems, gas systems
    • Two-phase fluid
  • Network drawing to shaft circulators and a series of terminals of energy use
  • Customizable terminal databases with indication of the thermal properties (specifications) and dimensional: ability to associate custom .dwg blocks two and three-dimensional
  • Customized manifolds, pipes (all materials), generators databases
  • Unified network of components and design (with ASHRAE symbolism) or three-dimensional scale
  • Automatic sizing the radiators in various ways.
  • Distribution networks graphical input and the possibility of manual insertion of a fictitious external pipe section
  • Automatic link between the pipelines network and designed terminals (multiple selection)
  • Trunks lengths calculation and singularity, diameters dimensioning, terminal balancing, effective range of the distribution, dispersed energy along the path (actual temperature at the terminals), insulation thickness based on the pipe location
  • Plumbing networks sizing calculation on the load unit basis (UNI 9182) and statistics courses (DIN 1988)
  • Creating and customizing tables for the association between unit load and flow
  • Displayed objects modifications and update the results of real-time calculation
  • Detailed calculation report in RTF format and bill of materials (.RTF and .XLS)
  • Automatic drawing of the Return network for heating systems and Heat network for plumbing systems
  • Special pieces manual entry (balancing valves, gate valves)
  • Management changes in elevation of the drawing through anchor building objects
  • Enter grip point and Osnap point on designs drawn by the user terminal
  • Ability to export drawings

Radiant cooling

  • Heating calculation according to ASHRAE
  • Cooling calculation according to ASHRAE (in combination with Carterm)
  • Ability to input room tabular powers for heating and cooling
  • The new window for the supply temperature control allows a higher level of interaction with the project directly allowing the modification of parameters such as: power environment, the number of circuits, the type of step, covering, etc.
  • Customizable databases finishes, radiant systems, pipes, panels and steps of the circuits, manifolds
  • Automatic extraction and/or manual paneled perimeters
  • Automatic design of circuits for floors, walls, and ceilings
  • Design of spirals, serpentines, guided serpentines, double serpentines, and more in general of the radiant systems following categories:
    • Embedded pipes in wet concrete structures
    • Pipes placed in wooden or dry structures
    • Immersed pipes in drywall panels or capillaries
  • Dynamic design of the conduits
  • Extended data not modal for editing the project in each component
  • Possibility of manually editing the circuit coils
  • Preparing the radiant systems design, prefabricated air-conditioning
  • Control Panel for the detailed results analysis for central heating, for manifold, for room
  • Calculations of dimensioning, balance, and quantity surveys
  • Multilingual technical reports in RTF format
  • Bill of materials in multilingual RTF and .XLS formats.
  • Ability to export drawings

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