Het hoofdstuk Verwarmingsinstallaties betreft het geheel van leveranties en werkzaamheden, nodig voor het in het werk brengen en bedrijfsgereed maken van leidingen en kanalen voor warmtedistributie, toevoer van verbrandingsolie en verbrandingslucht, toevoer van rookgassen, lichamen voor warmteafgifte en apparaten voor warmte- opwekking.
| Naam | Specialisatie | Plaats |
|---|---|---|
| Oosterhoff Poolen Installatietechniek | 51.00 52.00 60.00 53.00 61.00 60.00 61.00 43.22 | Ermelo |
| Oostrom Installatiebedrijf B.V. | 50.00 51.00 52.00 53.00 54.00 55.00 60.00 61.00 62.00 68.00 70.00 55.00 60.00 61.00 62.00 70.00 43.22 28.25 | Gouderak |
| Op het Veld Electrotechniek B.V. | 70.00 75.00 56.00 60.00 75.a 61.00 60.00 61.00 70.00 43.21 78.00 | Belfeld |
| Opdenduurzaam B.V. | 50.00 51.00 52.00 70.33 61.41 60.51 | Tilburg |
| Open Haarden Centrum B.V. | 55.00 60.00 55.00 60.00 | Vlaardingen |
| Open Haarden Ton van Dam | 55.00 60.00 61.00 62.00 68.00 55.00 60.00 61.00 62.00 43.22 | Hoofddorp |
| Openhaardencentrum Wierden B.V. | 60.00 35.35 35.45 35.a 35.b 60.00 46.83 | Wierden |
| Opper B.V. | 70.33 60.51 61.00 70.00 | Herten |
| Opsinox | 61.00 60.00 55.00 24 46.82 68.00 GH.08 GH.01 GH.04 | Nazareth |
| Optima-Cool | 50.00 51.00 52.00 53.00 54.00 54.a 55.00 56.00 57.00 60.00 60.12 61.00 61.12 62.00 62.12 68.00 55.00 60.00 61.00 62.00 65.50 68.00 60.10 60.20 60.30 60.40 60.50 60.60 60.70 61.10 61.20 61.30 61.40 61.50 61.61 61.62 61.63 61.64 61.70 61.80 62.10 62.20 62.30 62.40 62.50 62.60 62.70 63.00 63.10 63.20 63.30 63.40 63.50 63.60 63.70 65.10 65.20 65.30 65.40 65.60 68.02 68.10 68.20 68.30 68.40 68.50 68.60 14.60 56.10 43.22 5 T5 .58 6 T6.61 6 T6.62 6 T6.63 6 T6.65 66.10 66.00 41.00 | Aalter |
| Optimum Engineering & Consultant N.V. | 50.00 51.00 52.00 53.00 54.00 55.00 56.00 57 57.00 60.00 61.00 62.00 68.00 | Willemstad |
| Orangeclimate Verhulst | 60.00 61.00 62.00 68.00 61.41 61.43 60.00 61.00 62.00 61.42 61.13 61.12 61.11 60.51 60.52 62.41 62.42 90.00 68.00 04.10 65.40 66.10 66.13 66.12 68.01 68.02 68.20 68.21 68.22 68.23 68.24 68.25 68.26 68.27 68.28 68.60 68.61 68.62 68.63 68.64 | Drunen |
| Ordelman en Dijkman Installaties Hengelo B.V. | 50.00 51.00 52.00 53.00 54.00 54.a 54.31 54.70 54.b 55.00 55.12 55.13 55.51 56.00 57.00 60.00 60.13 60.31 60.33 60.41 60.42 60.51 60.52 60.60 60.12 61.00 61.13 61.32 61.41 61.42 61.43 61.51 61.52 61.60 61.81 61.12 62.00 62.12 62.13 62.31 62.33 62.41 62.42 62.51 62.60 62.71 62.81 68.00 70.00 70.31 70.32 70.33 70.34 70.35 70.41 70.43 70.51 70.53 70.81 70.87 75.00 75.45 75.46 75.51 78.00 75.a 55.00 60.00 61.00 62.00 70.00 43.22 | Hengelo GLD |
| Otgaar-Leiden Installatietechniek | 50 60.00 55.00 53.00 52.00 51.00 50.00 55.00 60.00 43.22 | Oegstgeest |
| Otter installatie B.V. | 50.00 51.00 52.00 53.00 55.00 60.00 61.00 62.00 68.00 33.33 55.00 60.00 61.00 62.00 43.22 | Hoogblokland |
| Otters Installatietechniek | 60.51 43.22 | Wehl |
| OTTO JOUCK ET FILS - OTTO JOUCK UND SOHN SPRL | 50.00 51.00 52.00 53.00 54.00 54.a 55.00 56.00 57.00 60.00 60.12 61.00 61.12 62.00 62.12 68.00 55.00 60.00 61.00 62.00 65.50 63.00 60.70 17.60 17.70 60.10 60.50 61.10 62.10 63.20 65.10 65.20 68.00 43.22 6 T6.61 6 T6.62 6 T6.63 6 T6.65 9 T9.92 | BÜTGENBACH |
| Oudendorp Totaal Afbouw B.V. | 44.00 48.44 48.43 70.81 46.00 41.00 60.41 40.00 | Harderwijk |
| Oudes & Laseur Electrotechniek | 55.00 60.00 61.00 62.00 68.00 70.00 75.00 55.00 60.00 61.00 62.00 70.00 43.21 43.22 | Bergen NH |
| Oventrop Nederland B.V. | 50.50 50.51 51.61 51.62 51.63 52.63 52.62 52.61 54.50 55.11 54.40 55.51 55.52 55.53 56.51 56.52 56.53 60.00 60.11 60.12 60.13 60.14 60.31 60.32 60.33 60.34 60.35 60.38 60.41 60.42 60.51 60.52 60.60 60.71 60.72 60.73 60.74 60.81 60.82 60.83 61.00 61.11 61.12 61.13 61.14 61.31 61.32 61.33 61.36 61.38 61.41 61.42 61.43 61.51 61.52 61.60 61.81 61.82 61.83 62.71 62.72 62.73 62.74 | Utrecht |
| Overbosch Installatietechniek | 53.00 70.00 60.00 50.00 60.00 70.00 43.22 43.21 | Zelhem |
| Overmars Installatietechniek | 70.00 47.31.a 47.31 60.51 43.21 | Heino |
| P. de Vries Installatietechnieken B.V. | 53.00 54.00 50.00 51.00 52.00 56.00 55.00 68.00 62.00 61.00 60.00 57.00 54.a 55.00 60.00 61.00 62.00 43.21 43.22 | Leeuwarden |
| P. Heijnens Installaties B.V. | 51.00 52.00 53.00 57.00 56.00 55.00 55.12 55.13 55.00 55.51 60.00 60.12 60.13 60.31 60.33 60.41 60.42 60.51 60.52 60.60 60.71 60.00 60.81 61.00 61.12 61.32 61.13 61.41 61.42 61.43 61.51 61.52 61.60 61.00 61.81 62.00 62.12 62.13 62.31 62.33 62.41 62.42 62.51 62.71 62.60 62.00 62.81 68.00 43.22 | Valkenburg |
| P. Jansen Installatietechniek B.V. | 62.00 60.00 61.00 14.00 70.00 60.00 61.00 62.00 70.00 43.22 43.21 70.00 | Bergen op Zoom |