After failing to purchase a Navien as a consumer, I have began looking at Rinnai combi boiler since I can source them from multiple vendors.
I went ahead and measured my fin elements and contacted Rinnai for further guidance on their models.
3000sf split level home
Northern ohio
Natural gas
148' of finned elements mostly located on exterior walls.
4 sinks
2 bath
1 Dishwasher
1 washer
After giving the stated information to an engineer at Rinnai, he suggested a I090CN.
From looking at the unit's BTU, it appears to be half the size as the calculators I have used online. Since I am replacing my boiler due to being undersized (70,000 BTU input non high efficiency) and the unit running 50% of the day as per Nest and my own observations, I have become somewhat hesitant to purchase anything close to my current boiler.
I went ahead and measured my fin elements and contacted Rinnai for further guidance on their models.
3000sf split level home
Northern ohio
Natural gas
148' of finned elements mostly located on exterior walls.
4 sinks
2 bath
1 Dishwasher
1 washer
After giving the stated information to an engineer at Rinnai, he suggested a I090CN.
![www.rinnai.us](/forums/proxy.php?image=https%3A%2F%2Fimages.salsify.com%2Fimage%2Fupload%2Fs--e6DjUlXM--%2Fw_700%2Fpbrybfqkuadvcs7xkhbm.png&hash=bbc52a4d723402a5479f7a6346bc9d68&return_error=1)
i090CN | Rinnai
i090CN - Residential Boiler - Condensing Boiler Condensing 95.9% Combination Natural Gas Boiler with 90,000 BTU Input
www.rinnai.us
From looking at the unit's BTU, it appears to be half the size as the calculators I have used online. Since I am replacing my boiler due to being undersized (70,000 BTU input non high efficiency) and the unit running 50% of the day as per Nest and my own observations, I have become somewhat hesitant to purchase anything close to my current boiler.