Smart Heating Design Tool
🏠 Heat Loss
ℹ️ Help
1
Heat Loss
2
Radiators
3
Results
1️⃣ Heat Loss
2️⃣ Radiators & Collectors
▶ Run Calculations
3️⃣ Results
🧮 Heat Loss Mode
🧮 Heat loads are
UNKNOWN
— let the tool calculate them
🔒 Heat loads are
KNOWN
— enter per-room heat losses manually
Mode: 🧮 Heat load is UNKNOWN — the tool will calculate room heat losses.
📐 Insulation Level
Wall
Not Insulated (0 cm)
Insulated (5 cm)
Insulated well (10 cm)
Roof
Not insulated (0 cm)
Insulated (5 cm)
Insulated well (>10 cm)
Ground
Not insulated (0 cm)
Insulated (5 cm)
Insulated well (>10 cm)
Glazing Type
Single
Double
DoubleHR
Triple
Selecting a preset sets a typical U-value; override manually below.
🏠 Building Envelope (U-values)
Wall U-value (W/m²K)
External wall U-value
Roof U-value (W/m²K)
Ground U-value (W/m²K)
Glazing U-value (W/m²K)
🌡️ Outdoor Conditions
Outdoor Temperature (°C)
Design outdoor winter temperature
🏘️ Number of Rooms
Rooms
Add rooms first, then fill in details.
⚙️ Additional Settings
💨 Ventilation Settings
▼
Ventilation Method
Simple
NBN-D-50-001
Ventilation System
C
D
Air Tightness v50 (1/h)
🔍 Advanced Settings
▼
Neighbour Temperature (°C)
Neighbour Loss Coeff (Un)
Infiltration Rate (LIR)
Wall Height (m)
🧾 Room Configuration
Click cells to edit
#
Room Name
Indoor Temp (°C)
Floor Area (m²)
Walls External
Glazing (%)
Room Type
On Ground
Under Roof
Tip: Indoor Temp 10–24 °C · Walls external 1–4.
✍️ Manual Room Heat Loss
Room Name
Manual Heat Loss (W)
Tab 2 & 3 use these values instead of calculated ones.
📊 Room Heat Loss Results
Fill in room details above to see results.
🛠️ System Configuration
Number of Radiators
Number of Collectors
Delta T (°C)
Supply Temperature (°C)
(optional)
Blank → existing system mode. Fill in → LT dimensioning mode.
🔍 Existing system mode: required supply temperature will be calculated.
Override diameter per radiator
When checked, a diameter column appears in the radiator table.
🌡️ Radiator Inputs
#
Room
Collector
Power 75/65/20 (W)
Circuit Length (m)
Electric Power (W)
Pipe Diameter
Emitter type
🧩 Valve Settings
Valve Type
Custom
Danfoss RA-N 10 (3/8)
Danfoss RA-N 15 (1/2)
Danfoss RA-N 20 (3/4)
Oventrop DN15 (1/2)
Heimeier (1/2)
Vogel und Noot
Comap
Positions
Kv max
🧰 Collectors
Collector
Circuit Length (m)
📊 Radiator / Room Heat Loss Assignment
Assign rooms in the radiator table above.
▶ Run Calculations
Performance Metrics
🏠
0 W
Total Heat Loss
🔥
0 W
Total Radiator Power
💧
0 kg/h
Total Flow Rate
📊
0 °C
Weighted ΔT
🌡️
N/A
Highest Supply T
⚡
0 Pa
System Pressure
System Performance Charts
Power Distribution
Temperature Profile
Pressure Loss Analysis
Mass Flow Rate
Valve Position Analysis
Summary
Run calculations to see results.
🔄 Pump Check
Pump Model
Grundfos UPM3 15-70
Wilo Yonos PICO 25-1/6
Generic 25-60
🔍 Check Pump
Detailed Results — Radiators
No results yet.
Detailed Results — Collectors
No results yet.