SubZero Heat — Climate Heating Engine

Residential & space heating simulation • 6 climate zones • 12 heating systems • Snow/ice/space physics

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Climate Zone

Custom Weather

Min Outdoor Temp -20 °C

Diurnal Swing 8 °C

Avg Relative Humidity 60%

Peak Solar Irradiance 300 W/m²

Wind Speed 5.0 m/s

Latitude 55°

Day of Year 15 (Jan)

Ground Temp (3m) 4 °C

Snow Depth 0.3 m

Cloud Cover 70%

Building

Floor Area 150 m²

Ceiling Height 2.7 m

Wall R-value 4.0 m²K/W

Roof R-value 6.0 m²K/W

Floor R-value 3.0 m²K/W

Window-to-Wall 15%

Window U-value 1.2 W/m²K

Window SHGC 0.50

Infiltration 0.3 ACH

Occupants 4

Thermal Mass

Orientation 180° (S)

Conventional Heating

Air-source heat pump

HP Capacity 10.0 kW

HP Rated COP 3.5

Ground-source heat pump

GSHP Capacity 12.0 kW

GSHP COP 4.0

Gas boiler / furnace

Gas Capacity 20.0 kW

Gas Efficiency 0.92

Gas Price 0.06 $/kWh

Electric resistance

Heater Capacity 5.0 kW

Passive / Natural

Solar thermal collectors

Collector Area 10 m²

Collector Efficiency 0.60

Passive solar gain (windows) Trombe wall

Trombe Area 8 m²

Trombe Mass 1500 kg

Earth tubes (pre-heat intake air)

Tube Length 30 m

Phase-change material (heat storage)

PCM Mass 80 kg

PCM Melt Temp 21 °C

Advanced / Recovery

Heat recovery ventilation (HRV)

HRV Efficiency 0.85

Waste heat recovery (from cooling)

Waste Heat Avail 2.0 kW

Waste Heat Temp 46 °C

Snow insulation modelling

Space Mode

Enable space thermal mode

Spacecraft Mass 5000 kg

Surface Area 40 m²

Solar Absorptivity 0.30

IR Emissivity 0.85

Internal Heat Gen 500 W

Sun Distance 1.0 AU

Sun-facing Fraction 0.25

Heater Power 200 W

Building / Spacecraft View

System Placement Guide

Indoor vs Outdoor Temperature

Heat Loss Breakdown

Heating Power by System

Cumulative Energy Use

Optimizer Results

Design Report

Results

Peak Heating Load

—

24h Energy Use

—

kWh

Daily Running Cost

—

$/day

Comfort Hours

—

of 24h (18-22°C)

Avg Indoor Temp

—

°C

Min Indoor Temp

—

°C

System COP (avg)

—

Capital Cost Est.

—

installed

Heat Loss Breakdown

Walls

—

kWh

Roof

—

kWh

Floor

—

kWh

Windows

—

kWh

Infiltration

—

kWh

Heating Supply

Heat Pump

—

kWh

GSHP

—

kWh

Gas Boiler

—

kWh

Electric Resist

—

kWh

Solar Thermal

—

kWh

Passive Solar

—

kWh (free)

Trombe Wall

—

kWh (free)

Waste Heat

—

kWh (free)

HRV Recovered

—

kWh

Snow Insulation

—

kWh saved

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