Professional HVAC System Calculator

Calculate heating, cooling, and ventilation requirements for your building. Get accurate load calculations, system sizing recommendations, and comprehensive cost analysis.

Building Information

Building Type

Total Floor Area (m²)

Number of Floors

Ceiling Height (m)

Building Age (years)

Occupancy (people)

Location & Climate

Climate Zone

Winter Design Temperature (°C)

Summer Design Temperature (°C)

Average Humidity (%)

Insulation & Construction

Wall Insulation Quality

Roof Insulation Quality

Window Type

Window Area (% of wall area)

Door Quality

Air Tightness Level

HVAC System Selection

HVAC System Type

Heating Type

Cooling Type

Ventilation Type

Advanced Options

Solar Heat Gain Coefficient (SHGC)

Internal Heat Load (W/m²)

Operating Hours per Day

Desired Indoor Temp (Winter) (°C)

Desired Indoor Temp (Summer) (°C)