A little curiosity. A clearer comparison.
What could a warmer home look like?
Watt if turns household energy assumptions into something you can explore. Change your home’s consumption, choose an upgrade and see the estimated running costs, upfront investment and payback together.
A useful starting point
Sample home sizes give the explorer a starting point. Consumption, heating type and tariffs remain editable, so the assumptions are always visible.
Six upgrades. One comparison.
Try insulation, draught proofing, lighting, heating controls, a heat pump or solar. Bundles help you begin; individual settings let you look more closely.
Keep the costs in view
A 25-year projection places upfront costs alongside ongoing savings. Download a text summary or print your scenario to keep the assumptions with the result.
Made for smaller screens
The same questions.
Room to explore.
The mobile edition stacks the controls and keeps a savings summary within reach. Both HTML prototypes work locally without an account or external data service.
From layout to working model.
Desktop and mobile Figma designs sit alongside the interactive HTML versions. The HTML handles freeform inputs, calculations and downloadable plans.
An independent design prototype with illustrative estimates, not a quote or personalised energy advice. Prices and performance stay constant in the projection. Currency selection changes labels only; it does not convert prices. Actual results depend on the home, installation and local conditions.