How does very cold intake water affect performance?

My input water temps change with the seasons, this water heater controls the amout of heat being produced at the burner, to maintain output water temp. at set levels. I set my water temp to 115F and regardles of input water temp. it stays at the set output.

Will you please list EVERYTHING you will need to install this unit?

In addition to the Rinnai unit you will need a termination vent kit and a isolation valve kit. (The isolation valve kit is included with all models NOT beginning with "V".) MyPlumbingStuff

Is this unit sufficient for Tennessee climate? I've read somewhere that it was for warmer climate areas (Florida/Texas)

Hi S. French. I live in New England which is mixed climates: Hot/Humid summers and in winter dry/colder climates. It's an indoor unit, which is in my basement, so I'm not sure how sensitive the climate is related to operation of the unit. If it were outside I would think it would be of more concern.

Does this unit come with controller? rinnai tech said i needed a mc-91-2us controller? do i need to buy separate?

I bought model V65EN. It came with a wired digital controller. The installer did not run the wire into the house and mount the controller indoors. He simply set the controller at 120 degrees and left the controller inside the unit. If I want to change the temp, I have to take the cover of the unit.

ASIN	B0084CPEQQ
Brand	Rinnai
Capacity	7.5 gallons
Colour	V75in - Natural Gas/7.5 Gpm
Customer Reviews	4.3 out of 5 stars 240 Reviews
Efficiency	High (Energy Factor of 0.82)
Flow Rate	7.5 Gallons Per Minute
Global Trade Identification Number	00766156007057
Included Components	Water Heater
Is Electric	No
Item Dimensions W x H	76.2W x 33H centimetres
Item Type Name	Rinnai Indoor Tankless Hot Water Heater / V75IN / Natural Gas / 7.5 GPM
Item Weight	20.68 kg
Item height	26.9 inches
Manufacturer	Rinnai
Material	Copper
Model Number	V75IN
Mount Type	Wall
Power source	Gas Powered
Product dimensions	76.2W x 33H centimetres
Special Features	Energy Factor of .82 for both gas types, Enhanced scale detection lessens possibility of serious, long-term damage to unit, Leak detection shuts off water to unit to limit property damage, Temperature Lock, Temperature range with controllers: 98ºF - 140ºF
Special feature	Energy Factor of .82 for both gas types, Enhanced scale detection lessens possibility of serious, long-term damage to unit, Leak detection shuts off water to unit to limit property damage, Temperature Lock, Temperature range with controllers: 98ºF - 140ºF Special feature Energy Factor of .82 for both gas types, Enhanced scale detection lessens possibility of serious, long-term damage to unit, Leak detection shuts off water to unit to limit property damage, Temperature Lock, Temperature range with controllers: 98ºF - 140ºF See more
Style	V75iN - Natural Gas/7.5 GPM
UPC	766156007057
Voltage	120 Volts

Rinnai Indoor Tankless Hot Water Heater / V75IN / Natural Gas / 7.5 GPM, Large, V75iN-Natural

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