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[heat550]

I noticed with dryer oak . My heatmor 200  cycles even at -20f up to 30-45 mins ( that's draft fan off ) Now I want to fix the cold rooms by putting in some air exchangers as the rooms dont have enough baseboard . Could I just plumb in to the zone valve loop and put a snap disc on the copper pipe To turn fan on and off auto run by water temp only. zone valve witch is run by thermostat.  ( this would be so fans never blowing cold air ) I seen they have set able  snap discs now . so be like on at 100f off 100f give or take 15 degrees .

Also I just bought a touch less thermometer . Whats the range do you want your return water to drop in degrees so house it pulling heat off . I'm noticing mine dont drop much with just baseboard only 4-5 degrees ( this incoming to house and out going ) . But in my shop with air exchanger it drops about 7 degrees when fans running  1 degree if fans off . Touchless thermometer tells you the whole story whats going on wish I had it at -26f  Could of got a better feel for what heat was doing with my baseboards. as I'm finding out you cant get enough heat off a baseboard in bigger rooms . work great in bedrooms . Bigger rooms must need air exchangers to keep up with the bigger space .  living and learning ..

heat550

[slimjim]

Good morning Heat, What are your water temps at, the hotter the temps are the more a foot of baseboard will give off, maybe you could add more or a cast Iron rad in those big rooms, You will not like a fan driven rad setup as they are very noisy and consume quite a bit of power, I have one here in my office to show to customers and I hate the damned thing with a passion, our main heat in the entire house is some fairly large cast Iron rads, they are aesthetically beautiful and if you place them in the right spot you will find that visitors to your home will back up to them to get warm on a cold winters night, no noise, no extra power consumption!

[heat550]

Good morning Heat, What are your water temps at, the hotter the temps are the more a foot of baseboard will give off, maybe you could add more or a cast Iron rad in those big rooms, You will not like a fan driven rad setup as they are very noisy and consume quite a bit of power, I have one here in my office to show to customers and I hate the damned thing with a passion, our main heat in the entire house is some fairly large cast Iron rads, they are aesthetically beautiful and if you place them in the right spot you will find that visitors to your home will back up to them to get warm on a cold winters night, no noise, no extra power consumption!

Good point . Need to have a think about it . wonder if they sell long tube style fans likes on a dustless air conditioner there probably the quietest  I have ever heard . I know what you mean about fans and duct work noisy that was my first idea thats why I went with baseboards . but with a addition and more windows in the rooms . It kinda messed that all up . Wonder if i found a cast iron rad if rust in water be a big issue . years ago I messed up school was giving them away . I could get creative and make some out of copper pipe and bricks . sounds crazy but I bet it would work good . My luck it heat up the bricks thermostat kick off and then cook me out of the room . 

Heat550

[slimjim]

I would try googling cast Iron rads, be sure to get the ones for hydronics and not steam, steam is not connected by nipples on the top so there is no way to purge the air from the sections, there is a company up here in Maine that reconditions , tests, paints and guarantees them, you speak of building one, I built a copper manifold on top of one for clothes drying for one of my customers once, that was really cool, looked funny but worked great! You are on the right track, I would certainly stay away from the rad fans.