Heat exchangers

[juddspaintballs]

I'm about to buy a water to air heat exchanger. I've found a few that appear to be decent prices. Can anyone comment on the quality of any of these and direct me to the one I should purchase?

I've heard a few good reviews on this seller from this forum
http://cgi.ebay.com/WATER-AIR-HEAT-...tem&pt=LH_DefaultDomain_0&hash=item5adaa2cc87

Out of the forum advertisers
http://cozyheat.3dcartstores.com/22quot-x-22quot-Water-To-Air-Heat-Exchanger_p_191.html

Another forum advertiser
http://www.outdoorfurnacesupply.com/22x22-water-coil-heat-exchanger-p-34.html

On the surface, these all look to be pretty much the same.

While we're at it, I might as well purchase a sidearm exchanger for my water heater(s). I think I'm going to go with a sidearm and if I don't like it, switch to a flat plate and pump eventually. So here's what I've found so far:

Ebay guy again
http://cgi.ebay.com/SIDE-ARM-HEAT-E...tem&pt=LH_DefaultDomain_0&hash=item230808f448

Cozy Heat again
http://cozyheat.3dcartstores.com/Turbotec-Domestic-Side-Arm--Double-Wall-Exchanger_p_31.html

OFS again
http://www.outdoorfurnacesupply.com/side-heat-exchanger-p-89.html



Thanks for the help.

 

[rwh442]

How hard is your water? How old is your water heater?

The reason I am asking - or warning - is that I have a lot of flow restriction due to calcium build up in my hot water heater. I have a sidearm and am thinking of either a small pump and/or water softener to improve heat transfer. Or mabye a Boilermate or similar.

With a flatplate - you better have good water.

My $.02.

 

[juddspaintballs]

I have hard water. If I went flatplate, I was planning on cleaning it out yearly as preventative maintenance. My water heater situation is a little different. My current one is 12 years old. I have a brand new one sitting in the box downstairs as well. I was planning on installing the new one and wiring it up, and also using the old one as a storage tank only and not wiring that up. I think all it will need is a new anode rod because it drains clean every time.

 

[juddspaintballs]

Well I guess I'll order both from freeheat4u. I've seen others on the forum happy with his stuff. Can't be that expensive of a mistake if it's bad, right?