HomeTwin Studio

Furniture

Click a piece to drop it in the middle of the view, then drag it into place. R rotates, Delete removes.

Airflow & ventilation

A 2D potential-flow solve across the floor. Openings facing the wind push air in; the rest pull it out.

Wind directionSW

Wind speed7 mph

Overlay Flow arrows Speed heatmap

still

breezy

Room	ACH	Flow

Estimates only. ACH = CFM x 60 / room volume, with window CFM from 88 x area x wind speed x 0.25 cross-ventilation effectiveness. Not a substitute for a Manual J or a code ventilation calc.

Daylight

Sun position from date, time, latitude and how the house sits against true north.

Time of day14:00

DateSep 20

Latitude37.0°N

Plan rotation vs. north0°

Ceiling height9 ft

Sun

Solar position uses a standard declination and hour-angle approximation, accurate to roughly a degree. Good for shadow direction, not for solar panel yield.

Configurations

One home, many arrangements. Save the current layout, then try another and switch back.

Cost estimate

A quantity takeoff straight off the model, priced at national averages.

Pricing--

Regional multiplier1.00x

Item	Quantity	Cost

Refinish-everything scope: the takeoff assumes all floors, walls and trim in the plan are new. Unit costs are national averages and swing widely by market and finish level. Treat the total as a range, not a quote.

Maintenance

Generated from what is actually in the model.

Task	Every

Import existing home data

Bring in a home you already captured. Drop a file anywhere on the canvas, or pick one here.

Scan or plan file

Format	Comes from
HomeTwin JSON	this app
RoomPlan JSON	iPhone / iPad LiDAR scan
OBJ, GLB, STL, PLY	any LiDAR scanner app
Wall CSV	x1,y1,x2,y2 in feet
Floor plan image	below, as an underlay

Imported geometry lands in feet, recentred on the origin. Scanned rooms usually need a pass with the wall tool before the airflow numbers mean anything.

Scan mesh underlay

Drop in an OBJ, GLB, STL or PLY from any LiDAR scanner app. It gets sliced at waist height into a floor plan you can trace or auto-detect walls from.

Mesh file

Blueprint underlay

Drop in a floor plan image, set its scale with two clicks, then trace over it with the room tool.

Floor plan image

Opacity55%

Scale1.00 ft/px

Save & load

The plan autosaves in this browser. Copy the JSON to move it elsewhere.