I started a thread in heating cooling ventilation section about heating my new home. The builder says our house will need two furnaces due to volume. I'm doing my due diligence looking at alternative solutions and one think I have currently considering is a boiler and air handlers. The original thread is here [url]http://www.doityourself.com/forum/gas-oil-home-heating-furnaces/457120-4000-sqft-home-2-furances-required.html#post1890930[/url] Below is one of my posts explaining my current line of thinking, I would appreciate any comments and suggestions you may have. Thanks *Copied post* Going back to my alternatives here is what I am currently researching, comments are appreciated Either 3 small air handlers or 1 larger one, with 4 speed variables fans, The units come with a water heat exchanger. AH-95 Air Handler - 106,241 - 90,014 Btu's smaller one AH-220 Air Handler - 233,373 - 197,884 Btu's larger one A boiler capable of providing heat for the house, or possible two boilers with the second only kicking in as required. Even better option would be electric heat in each air handler. Electric could be used spring and fall when you just need a bit, boiler for winter and boiler and electric when its really cold out An AC unit that cools water/glycol in a tank that can be circulated through the coils in the air exchanger, preferably the boiler and cool tank would have the same liquid so I can switch hot and cold with solenoid valves and not need two heat exchangers. I could control the fan speeds, valves, circulation pumps, call the AC and boiler to run etc all from a PLC. I'm assuming their isn't a great control system for this type of system out there? If I put on modulating valves I could controls the system to run continuously and hold a temperature instead of cycling on and off.

I tried to get to burnham.com today and it forwarded me to their commercial boiler web site. Anyone know whats going on? I'm trying to look at the specs on their radiators.