Air Rotation vs. Rooftop Units Savings Calculator
|Description (*)||100,000 sq ft warehouse, 105,000 cfm unit, 230 tons, basic cooling only|
|Johnson Air-Rotation System Cost||$61,000|
|Cost for a Condenser, specialties, controls, etc||$100,000|
|Mechanical Contractor’s Install of Air-Rotation $ (**)||$79,900|
|6.5% avg Sales Tax $||$15,750|
|Total Air-Rotation COOLING ONLY Install $ (***)||$256,650|
|$/sq ft Installed ARU COOLING ONLY system||$2.57|
|Comparable Rooftop COOLING ONLY – option (according to a Houston Mechanical) – $ (****)||$392,600|
|$/sq ft Installed Comparable Rooftop COOLING ONLY option||$3.93|
|ALTERNATIVE OPTIONS – aditional cost for adding heating Air-Rotation Mechanical Install (*****)||$23,000|
|6.5% avg Sales Tax $ on Addition of Heating||$3,023|
|Total Install Costs for Air-Rotation WITH HEATING AND COOLING (******)||$306,173|
|$/sq ft for an Installed Air-Rotation HEATING AND COOLING System||$3.06|
Note: the above tonnage is higher-than-average for a typical warehouse application with inside design temps @ 80 degrees
(*) – Double Fan Units, est $2k in freight included, 30′ tall ARUs, H&V Louvers, Condensate Pump, Avg Houston, TX cooling conditions, inside design @ 80 degrees for cooling (65 degrees for heating, stl conditions)
(**) – Mechanical’s share includes installation of ARU & condensing units + dual line refrigerant piping up to 100′, condensate, concrete pads & ballards, wall hole cutting and repairing, engineering drawings & permitting, commissioning; no electrical, no hot gas by-pass.
(***) – Does not include electrical sub-contracting work
(****) – Does not include electrical sub-contracting work, plumbing of condensate, independent test & balancing (often required with rooftops), roofing, roof cutting or patching, framing of roof openings, painting.
(*****) – Includes 100′ of gas piping, hole & install for flue, startup, etc. Summary: 2.) Additional significant costs with regard to electrical installation sub-contracting also works against rooftop units and in favor of Johnson Air-Rotation Systems equipment. As well, a roof’s structure is yet another potentially significant cost added against rooftops. 3.) Of course, the typical benefits and features of Johnson Air-Rotation Systems typically will apply: low energy costs, longer life of cooling system, ease of maintenance, better temperature control of the space, etc., etc.