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Which would you choose? - Mike T.
Am soom installing a "new old" hot water system, i.e. cast iron rads and black pipe. Rental home next door to mine. For cost sake, seriously doubt I'll be using TRVs even though I love them. Fortunately I have and have access to enough sizeable rads.
1) Size the rads to work with 140 degree MAX water and use a condensing boiler? Largest rads.
2) Size the rads to work with 160 MAX water and still use a condensing boiler presuming it will be condensing most of the time in our yo-yo climate? Slightly smaller rads.
3) Size the rads to work with 180 MAX water and use a standard cast iron boiler? Smallest possible rads.
Thanks for your opinions.