Hi
Im thinking of updating my radiators. My heating system is water boiler (not steam).
Can you identify what type of radiator in the picture?
What type of radiator would you recommend for maximum heat and efficiency?
Thank you
It's not a radiator- it's a fin tube convector.
To figure out it's output specs, measure the cabinet height width and depth dimensions, as well as those of the fins, and find a current product that is similar.
Modine is likely to still be selling something that is close enough. As long as they specify it at some average water temperature or entering water temperature it's possible to infer what it would deliver at your normal water temp, and compare it to other radiator types. Since yours doesn't appear to be built into the wall you have some flexibility in width/height/depth for what replaces it.
By "...maximum heat..." are you implying that the rooms aren't warm or comfortable enough? If the room to room temperature balance is reasonable replacing each convector with something of equal output at a given temperature is fine, but make note of any rooms that are often too cool or too warm, in which case some adjustments to the radiation sizing can be made.
Go ahead and find an appropriate series of convectors to compare, and add up the total amount of radiation on each separately controlled zone. Then
run a fuel use based heat load calculation. With that data it's possible to come up with the approximate water temperatures needed (lower water temperature=more comfortable, more efficient).
With the calculated load number and the nameplate output BTUs on the boiler the approximate oversize factor on the actual heat load can be inferred, and the water temperature at which the radiator output balances with the boiler output can be estimated.
The oversize factor relative to the heat load and or the radiation affects how the system as a whole needs to be controlled for maximum efficiency.
If it looks like there is enough radiator/convector output to cover the design heat load at 140F or lower it's worth considering replacing a older fully functional but way oversized boiler with a
right sized modulating condensing boiler then dialing-in the outdoor reset temperature curve to max out both comfort & efficiency.
European style convecting panel radiators are usually quite a bit more comfortable than fin tube convectors, but Eastern European/Asian style bimetal convecting rads aren't bad either. There are plusses and minuses to either/both, but the most important thing is sizing it correctly (and proportionally room by room ) for the loads.
^^bi-metal convecting radiator^^
^^panel radiator^^
On 1950s or earlier houses it's sometimes nice to stick with period-appropriate 5" deep x 20" tall cast iron convecting radiors such as Arco Sunrad or Burnham Radiant, etc., which are often available on the used market for dirt cheap. (But watch out- they're pretty hefty- you may need to hire your big sister to help move 'em.)
^^Burnham Radiant type^^
^^Arco Sunrad type^^