What type of system?

[banzaitoyota]

I am purchasing a 2 story modular house. 2000 sq ft downstairs, 1050 unfinished sq ft upstairs. House will be placed on a crawlspace type foundation. Planning on placing 2" thick flowable fill over 1"foam and a 6mm vapor barrier.
The house has 2" x 12" perimeter floor supply registers preplaced at the factory; and a large return in the master bedroom and the air handler closet in the utility/laundry room.

I am located near Aiken SC and wish to wisely spend my $$$ allocated towards HVAC. My previous house had a late 90's model Carrier dual fuel heat pump that gave lackluster performance. I replaced it with a goodman gas pack that is ok.

I do plan on having an energy audit performed when the house arrives. I have 2 estimates with Man J calcs performed, but the recommended system size varies.

I am trying to decide what is the most cost effective options are from an initial cost and operational costs.

I "think" I need to start by deciding on "what type" of central ventillation system will perform best for me.

Attached are 4 types of central vent systems I have found.
Thanks for the valuable input in advance.

Johnhttp://hvac-talk.com/vbb/attachment.php?attachmentid=9537&d=1224470513

[beenthere]

I don't see no pics.

[banzaitoyota]

What other info do you need?

[beenthere]

What are your utility rates.
Gas, electric, delivered including all taxes.


Are you just looking for heating and cooling.
Or are looking for comfort features.