Rinnai V65IP 6.6 GPM Indoor Low NOx Tankless Propane Water Heater Review

The advancements in technology have made propane water heaters better than ever. They are able to give you a lot of heat with the maximum level of efficiency. Those qualities can be found in the Rinnai V65IP 6.6 GPM Indoor Low NOx tankless propane water heater with the many great features it has.

Its size makes it ideal for medium-sized homes and it has many qualities which makes it the heater of choice for many happy customers. In this review, we will go deeper into those features while also looking at any downsides it has.


A water heater doesn’t have to be the most attractive product but this is still a model that looks good and won’t be an eyesore even if it is out on display. It is also compact and therefore isn’t going to take up a lot of space either.

As well as looking quite good on the eye, it’s also a heater which has a very well designed interface which is going to be easy to use. Having error lights will also alert you to any problems and overall it ranks very highly in terms of design.

Overall performance

When it comes to your water heater, you want the overall performance to be very high and in that respect, the Rinnai V65IP 6.6 GPM Indoor Low NOx tankless propane water heater doesn’t disappoint. The 6.6 GPM it can produce is impressive with a high BTU rate that is going to be able to supply you with endless hot water.

The ultra-low NOx will help to ensure that the heater is environmentally friendly and able to provide that heat efficiently. What you want from a heater is consistency and that’s what you get here as it will provide you with the hot water you need without any dips in temperature.


One of the greatest features of this heater is that it is very easy to install and you won’t have to pay a lot of money to get it up and running. It comes with all of the parts that you need and also a manual which is very clear with instructions that you won’t find hard to follow.

In terms of being able to vent your heater, all you need is a 3/4” pipe which isn’t going to be an issue. If you’re not confident with installing it on your own then any trained technician is going to be able to do it for you with the minimum amount of fuss.

Is it well made?

With such a product safety is always going to be paramount. Not only do you want it to have the right amount of safety features but you also need it to be very well made. Otherwise, you’re going to worry about any accidents occurring.

It’s a worry that you’re not going to have with the Rinnai V65IP 6.6 GPM. It is going to be able to hold up well to a lot of continued use and is also made from high-quality materials that aren’t going to let you down.

It features isolation valves, shut off valves, drains and pressure-relief valves all to ensure that nothing bad happens to the heater. Aside from these safety features, there are also other parts in place to prevent breaking.

These include the likes temperature locks and anti-frost protections which are going to prevent your heater from ever seizing up and not working. Due to these features, you’re offered a 5-year warranty on parts to go with a 10-year warranty on the heat exchanger.

Is there any downside?

The heater is set to offer an optimal temperature of 120 degrees. If you want it hotter than that you will need to buy an additional add-on to take it up to 140. While this can be a nuisance to some who want the higher temperatures, it is still good value for money.

For those you don’t want to wait at all for hot water, you might also be disappointed. There can be a wait of nearly a minute sometimes and that might be too long for some. For those with a little bit more patience, that won’t be an issue.

The verdict

Overall this is an impressive heater and one that has a remarkable level of qualities. The construction of the heater is incredibly impressive and it’s not going to let you down. The warranty is good but it’s doubtful that you’re ever going to use it.

The flow rate is very good and it is powerful enough to give you a constant stream of hot water. The negatives are very slight and for some, they won’t be a concern at all. For anyone who wants a compact and highly efficient heater, this is a great option.

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