A review of Rinnai boilers utilizing the condensing technology for combined whole-house space and water heating. Explore Rinnai condensing boilers' features and advantages.
A Rinnai condensing boiler is ideal for homeowners who want to use only one heat source – gas, for both residential water and space heating. These gas boilers are designed small but powerful that can provide extra efficient heating and offer the optimum comfort, economical and convenient heating.
Several Rinnai boilers utilize condensing technology and are designed for different home sizes, from small to large. The smallest condensing boilers from Rinnai come with the max. gas input of 75,000 BTU, while the largest one offers the maximum power of 205,000 BTU. All models are ultra-efficiency models with the high EF factor, which makes them Energy Star qualified.
|Efficiency||Water flow (GPM)|
|Q130S||130,000||96.1||Indirect tank compatible|
|Q175S||175,000||95.7||Indirect tank compatible|
|Q85S||85,000||96.5||Indirect tank compatible|
As you can see from the above table, there are two series you can choose from; Rinnai Q and E series.
The Rinnai Q series is designed for homes with higher hot water demand and larger families. The Rinnai E series is ideal for families with smaller hot water needs or smaller houses and apartments.
Models Q172C, E110C, and E75C are combi boilers for heating and domestic hot water (DHW), while other models are for space heating and optional DHW.
The Q172C model is the only model from the Rinnai Q series that comes with the indirect water storage tank, while other boilers can be connected to the indirect tank and provide hot domestic water also.
All the boilers are equipped with a water pump, and if an internal 3-way valve is installed on "S" system models, there is no need for a pump to run the water through the indirect tank.
The main disadvantage is that Rinnai boilers are expensive.
Rinnai boilers are expensive, but they offer premium quality of its components and ultra-efficient condensing technology, so the heating of your home and domestic water is economical and reliable. These superb devices are packed in a small and compact tankless design that doesn't occupy valuable living space - they are wall-mounted that can be installed almost anywhere.