| Firma | Kanton | PLZ | Ort | Webseite | |
|---|---|---|---|---|---|
| René Seuret SA | Jura | 2830 | Courrendlin | www.seuretsa.ch | |
| Renggli AG | Luzern | 6210 | Sursee | www.renggli.swiss | |
| Renovare AG | Bern | 3179 | Kriechenwil | www.renovare.ch | |
| Rethan AG | Aargau | 5600 | Lenzburg | www.rethan.ch | |
| reu gmbh, Ingenieurbüro für Haustechnik HLKS | Zürich | 8135 | Langnau | www.reu-gmbh.ch | |
| Rhyner énergie Sàrl | Wallis | 1893 | Illarsaz | www.rhyner-energie.ch | |
| Rhyner énergie Sàrl | Waadt | 1018 | Lausanne | www.rhyner-energie.ch | |
| Richers Consulting | St. Gallen | 8873 | Amden | ||
| Rickenbacher Zimmerli Architektur GmbH | Zürich | 8004 | Zürich | ||
| Riggenbach AG | Solothurn | 4600 | Olten | www.riggenbach-klima.ch | |
| Rigoleth SA | Graubünden | 7186 | Segnas | www.rigoleth-sa.ch | |
| Rigozzi Engineering SA | Tessin | 6512 | Giubiasco | www.rigozzi.ch | |
| Rikli AG Holzbau | Bern | 3374 | Wangenried | www.rikli-ag.ch |
|
| RLC Architekten AG | St. Gallen | 9424 | Rheineck | www.rlc.ch | |
| RLC Architekten AG | Zürich | 8400 | Winterthur | www.rlc.ch | |
| RMB Engineering AG Basel | Basel-Stadt | 4051 | Basel | www.rmb.ch | |
| RMB Engineering AG Bern | Bern | 3011 | Bern | www.rmb.ch | |
| RMB Engineering AG Lausanne | Waadt | 1005 | Lausanne | www.rmb.ch | |
| RMB Engineering AG Lenzburg | Aargau | 5600 | Lenzburg | www.rmb.ch | |
| RMB Engineering AG Luzern | Luzern | 6005 | Luzern | www.rmb.ch |
