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[pintopaul]

I have a question I have a 4300 wood master with only one feed, has anyone taken and put another line off the return line to feed another building. And if so does it work good? Thanks Paul

[E Yoder]

That would depend on the return water temps and what type of heater you have in the second building. Forced air aughta work ok altho the coil in the second building would heat better if oversized a bit. A high temp emitter like copper baseboard would not heat as well with return water.
 You could tee supply and return and make both pull full temp water too.

[pintopaul]

I want to use a modine hanging heater in my garage, my old furnace (model 434 had separate ports) this new one only had 1 supply and 1 return. Just didn't want to take all the heat going into house that's why I was asking if you could put it in the return from the house

[E Yoder]

Yes, then running it on return water should work fine.

[wreckit87]

Consider piping it something like this with another pump. Your return temps are likely getting down there already, so adding another unit heater into the same loop may cross the threshold into shocking the boiler or causing condensation with the return water if it's below 140 degrees. Piped with an extra pump will distribute heat more evenly and keep your boiler happy

[E Yoder]

I agree, tee-ing supply and return should not starve the house heat  and works better.

[pintopaul]

I was wrong on model it's a 3300 wood master