My service tec said my water temperature in my house will be consistence and won't be to hot or cold if I install a mixing valve on the heater. Would I still need a mixing valve if I install a Tankless Heater?
Thanks,
Jim-PA
[email protected]

Are we talking about your domestic plumbing and faucets or a heating system?

Yes Domistic plumbing to heater instillation

For domestic water

http://customer.honeywell.com/download/water/WAT288-Trifold-Broch-LoRez.pdf

Water Temperature - Honeywell Your Home Expert (http://yourhome.honeywell.com/Consumer/Cultures/en-US/Products/Water+Solutions/Water+Control/WaterTemperature/Default.htm)

For a hot water boiler

http://www.arguscontrols.com/images/3-way_Mixing.gif

Professional install required for both style devices. See your local HVAC or plumbing expert. This is because there are way to many different designs of systems so trying to describe how to do it would be impossible on a board like this.