Swapping an old radiator for new type

Dan_15 · February 2006

I asked about Runtal radiators before, and I need a little bit of follow-up advice. We are remodeling 2 bathrooms which each currently have a cast iron Burnham radiant radiator inset into the wall. Im wondering if I can just swap the the Burnham cast iron for Runtal omnipanel radiators. My system is Buderus G215/4 with R2107 and outdoor reset, plus indoor reset. The piping is an ex-gravity system, and I have no idea if the rads are in serial or parallel or what. The current bathroom rads heat up just fine, if not even a little too hot. Assuming that I get them sized properly, can I just swap the old for the new Runtal? Do I need to be thinking about anything else? Thanks.

Brad White_9 · February 2006

With constant circulation

and TRV's and with reset I think you will do just fine swapping them out. If you were near me I would take the old ones from you. Love 'em.

Brad (Boston by the way

)

Steamhead (in transit) · February 2006

If that's an old gravity system

you need to keep the pipe sizes the same. If you reduce them you will get little or no flow thru the new rad, resulting in little or no heat.

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Swapping an old radiator for new type

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