We are thinking about installing either a Rinnai R98LSi or R94LSi. We have a two bath house and live in Indianapolis, IN. My wife and I have two very young boys and expect to add a third kid in the next two years. We want to plan for the future when purchasing our tankless water heater. So, we are trying to decide if we will want or need the larger capacity of the R98 in the winter when the boys get older.

Here are my questions.

1. Given our situation, will the R94 satisfy our hot water demands or should we move up to the R98?

2. How do the two water heaters compare in terms of efficiency and gas usage? For example, will the R98 and R94 use the same amount of gas when heating water for one shower?

3. What is the significance of a minimum gas flow rate of 19,000 (R98) versus 15,000 BTUs (R94)?

4. Are there any differences in performance (other than hot water capacity) that I should be aware of?

Any help in answer these questions will be greatly appreciated. Thank you!

Here are my questions.

1. Given our situation, will the R94 satisfy our hot water demands or should we move up to the R98?

2. How do the two water heaters compare in terms of efficiency and gas usage? For example, will the R98 and R94 use the same amount of gas when heating water for one shower?

3. What is the significance of a minimum gas flow rate of 19,000 (R98) versus 15,000 BTUs (R94)?

4. Are there any differences in performance (other than hot water capacity) that I should be aware of?

Any help in answer these questions will be greatly appreciated. Thank you!

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