| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 11 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Thermal processes | |
| #3 | Civil engineering |
| Publication | Filing date | Title |
|---|---|---|
| FR2426216A1 | Heating system incorporated in inner airgap of building wall - has heaters at bottom and top of gap also producing air movement | |
| FR2392328A1 | Central heating installation for building - uses low temperature water for underfloor heating and to heat ambient air circulated by fan | |
| FR2360047A1 | Building central heating system - has warm water fed into individual units and then under floor and into common preheating unit |