I have a question about the viability of using tank less water heaters as a means to heat water for radiant heating systems. The specific concerns are as follows.
- Does using the tank less water heater for both domestic and radiant needs shorten the life expectancy and or void the warranty.
- Normally a boiler closed radiant system is between 12-20 psi. The domestic system is generally 40-80 psi. Does than mean with this type of configuration the radiant now has the same psi as the domestic. Is that a problem?
- Boilers normally heat water to 165-170 degrees for the radiant heat. The tank less water heater heats to only 120 becuase there is no separation between the heat and domestic systems. This must mean it has to run longer and or take longer to heat the same sq. footage.
I am concerned that while these systems are labeled “green” and are much less expensive that they are actually not sufficient to do a good job in a cold weather climate like Northwest Colorado.
Thanks in advance for your time and assistance.