Based on the search results, the best gas geysers for a 4 bedroom house would be the Alva GWH2016L 16L Gas Water Heater for R4299 or the 8L Gas Water Heater Including Flue for R3199. The 16L and 12L Alva models seem ideally sized to provide enough hot water for larger households like 4 bedrooms. They are also consistently in the highest price points, indicating better quality. While the 5L and portable options could work for smaller homes, the 8L or 16L options would be safer bets with a bigger family. Let me know if you need any other details on those models.
