Aerodynamics and networks
Sections, velocities, pressure loss, branch balancing
8Aerodynamic calculation
Pressure loss through a ventilation network run by run: Altshul friction plus fitting losses.
Inlet → outlet
flow, length, section and the fittings used → friction losses, fitting losses, total network resistance
Area and velocity
Surface areas of ducts and fittings, converted into air velocity and into a schedule.
Inlet → outlet
run size and quantity → sheet area, mass, air velocity in the section
Network calculation (VentFlow)
A system diagram built from components — fan, filter, heater, attenuator — with the pressure balance and the duty point.
Inlet → outlet
a graph of components and the airflow → pressure drop per component, the fan pressure required, and the duty point on the curve
3D duct builder
Assembles a duct route in a 3D scene and totals the lengths, areas and mass.
Inlet → outlet
route components and their sizes → a 3D model, length, sheet area and mass
3D fitting viewer
An interactive model of a bend, tee or reducer with the standard letter designations for each dimension.
Inlet → outlet
product type and dimensions A, B, L, D → a 3D model with dimension callouts
Control valve Kvs
The flow capacity of a two-port or three-port valve, with an authority check.
Inlet → outlet
water flow and the drop across the valve → Kvs, the nearest valve size, and its authority
Dust extraction
Dust extraction networks from local hoods: airflow, transport velocity and selection of dust collection.
Inlet → outlet
enclosure type, dust type and number of take-offs → flow, diameter, transport velocity, type of dust collector
Smoke extract
Smoke extract and pressurisation airflows to SP 7.13130.
Inlet → outlet
room type, area, height and fire load class → smoke extract rate, pressurisation rate, shaft cross-section
Heat and moisture
Heat loss, heating, moisture balance, cooling
6Room heat loss
Heat loss through the building envelope, allowing for infiltration and orientation.
Inlet → outlet
dimensions, wall and window build-ups, temperatures → heat loss by element, specific demand, total load
Heating coil
The duty of a hot-water or electric heater in a supply unit, and the water flow it needs.
Inlet → outlet
airflow, entering and leaving temperatures, water regime → duty, water flow, required Kvs
Psychrometric chart
States of moist air and the processes applied to it: mixing, heating, cooling and adiabatic humidification.
Inlet → outlet
temperature and humidity (plus the process parameters) → enthalpy, humidity ratio, dew point, plotted on the psychrometric chart
Air conditioning
Heat gains to a room and the cooling duty required.
Inlet → outlet
floor area, glazing, occupants, equipment, lighting → heat gains item by item, cooling duty, airflow
Swimming pool ventilation
Evaporation from the water surface to VDI 2089, and the dehumidifying airflow it calls for.
Inlet → outlet
water surface area, water and air temperatures, humidity → evaporation rate, airflow, dehumidification duty
Hot kitchen ventilation
Commercial kitchen extract hoods sized from the heat output of the cooking equipment.
Inlet → outlet
a list of appliances and their duties → hood airflow, hood dimensions, supply and extract balance
Acoustics
Fan noise and its attenuation along the run
1Selection and schedules
Equivalents, schedules, quantities and cost
4Find equivalents
Parses the part number of imported equipment and finds the closest size in the catalogue.
Inlet → outlet
a part number such as Systemair K 160 M → the brand, series and size it resolves to, plus a list of equivalents ranked by how closely they match
Equipment schedule
Builds a schedule of equipment and materials with totals by line and by section.
Inlet → outlet
lines, quantities and prices → a schedule with totals, exportable as a table
Ductwork cost
Sheet metal usage and fabrication cost for ducts and fittings, by material and gauge.
Inlet → outlet
material, gauge, sizes and lengths → sheet area, mass, cost per line and the total
BIM families
A showcase of parametric equipment families: formats, levels of detail and the parameters each carries.
Inlet → outlet
equipment type and format (RFA, DWG, IFC) → the family card, its parameters and its LOD
Reference data
Standards, climate data, units
3Codes and standards
The key clauses and tables of the Russian codes on ventilation, thermal performance, smoke control and noise.
Inlet → outlet
a section or a keyword → document cards with the relevant tables and requirements
Building climatology
Design climate data for Russian cities to SP 131.13330.
Inlet → outlet
city → design winter temperature, mean heating-season temperature, season length, degree-days
Unit converter
Conversion of the quantities used in HVAC work: flow, pressure, power, temperature and velocity.
Inlet → outlet
a value and its unit → the same value in every related unit at once