I am in the process of replacing my entire HVAC system in our 120 year old brick rowhouse in DC with little to no insulation, and drafty windows. Here is my plan, please give me your experience/advice on it.
Basement gas 40 Gal Water Heater
Basement gas forced air furnace
Both inefficient, poorly maintained, and in need of replacement. Both vent through clay lined chimney that makes me nervous.
Attic, Ruud UBHC electric air handler with an old Sears condensor for AC.
1st floor, heat is either all on or all off. Noisy, dry, uncomfortable, smells bad.
House Setup: Whole house is either hard wood (oak) or tile flooring. Will be opening the wet wall in the next few weeks to also redo both 2nd floor bathrooms. So I will have a direct shot to run water to the attic from the basement if necessary.
Since I have access to the 1st floor joists from the basement/crawlspace, I would like to go with radiant heating for the 1st floor. Two primary heat zones there. 1 front and 1 back, each with 3 rooms. Roughly 1000 sq/ft.
2nd floor will be a mix of radiant for the bathrooms, and hydro-air for the sleeping areas since I can't get under the flooring on the 2nd floor bedrooms. Also about 800 sq/ft.
Based on my heatloss calculations, the setup I've described, and my own equipment research/preferences, basically we need the following:
Munchkin 140M Boiler
Munchkin SSU-60 Indirect water heater
PEX for radiant
Joist Trak for hanging radiant
Recycled Cotton Insulation for joist bays
3, 3 or 4 loop manifolds (allowing for some future expansion)
4 Taco 007 Circulating Pumps (3 for radiant, 1 for pushing to Hydro-Air)
Vision 2 system from Munchkin to incorporate our outdoor reset and temp handling for the various zones.
Carrier Infinity Hydro-Air Handler???
Now the 140M makes sense due to our horribly insulated house, and the 60 Gal heater due to the fact that 45 is too small, and 80 to big, but the main issue I am having is what the Hydro-Air unit. What unit shoudl I use. What must I purchase. Is there a specific Carrier Hydro Unit? Do I just get a Fan Coil and buy a seperate boiler fed Hydro Coil? Should I be looking at the Apollo Hydro Heat MA Handlers? http://www.mindreactor.com/apollo/prod/ah_ma.html
Who else makes good Hydronic Air Handlers?
This is a 100% DIY job (I am capable without issue, have the necessary experience, plumber, electrician...) so I am trying to figure out the correct model to purchase. Any help would be greatly appreciated. Thank you very much in advance.
[Edited by santanaf on 11-03-2005 at 01:48 PM]