Heating System/HVAC
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initially published November 15, 2005
last updated - 28 Jan 2007

11.1 Status Report
Page 1
Page 2

11.2 Related Issues
Click here to view related issues

11.3 Possible Upgrades
All Air Conditioning upgrades will require new electric service of 400 Amp replacement or a separate 200 amp mechanical service.

At Unit size 3-3.5 tons = 850 CFM at 1.5 SP.

11.3.1 SPACE PAC
(4 systems at +-$50-$52K est.; possible 5 units may be required to cool commons areas at 2nd/3rd halls & bathrooms)

400 CFM/TON

30% better cooling - more cfm (suggest best return air design).

Method- stir air in room

“High Velocity - system,” (like a car)

“the invisible system of A/C- ease of installation

(First Floor Basement only at approximately 2 units at $25 - $28K)

Problems with system:

1. Lack of ability for user to adjust / climate control (Arch and fire dampers not in estimate for First Floor/Basement)
2. Noise within 1st 7’-0” from fan unit (Need exploratory holes)
3. Balancing- adjusting
4. Return air sizing and location see optional
5. Slower recoup time for improvement of air moisture

11.3.2 Fan Coil Units
WITHIN EACH room or groups ($125K no arch or electric)

Better moisture content (line sets need insulation)

(“Ductless mini” system)

Problems:
+ Condensation and evaporation line routes and labor intensive
+ More expensive labor to install
+ Large size cooling towers located on site/exterior

11.3.3 Central Air Handlers
Central System ($135 - $165K +- to $200K)

Problems: Major wall and closet damages to install

Positives: Good unit fan coil controls good moisture humidity control/ will improve heating systems

11.3.4 Central Residential Furnaces
(possible for basement and 1st floor)

($50 - $52K)

Require large duct and distribution