Airxchange Technology : Economics

Financial Benefits of Using an Airxchange Energy Recovery Wheel

Airxchange wheels provide a hedge against rising energy costs and offer risk free financial returns that are superior to alternative capital investments.

An HVAC system incorporating Airxchange wheels provides a more energy efficient building with compelling financial returns. The reduced cost of a smaller HVAC system offsets the added Airxchange wheel cost. In addition, this more efficient system provides ongoing operating savings. The chart below demonstrates how the installed cost can be lower for a system with a wheel, versus one without, resulting in an immediate financial benefit.

Financial returns vary based on climate since the wheel saves more energy in warmer and cooler climates. The implication of this characteristic is clear: warmer or cooler climates provide greater financial returns.

Location, Hours x Days
Cooling Capacity Saved (tons)
 Heating Capacity Saved (MBH)
ERV Net Capital Expenditure
ERV Yearly Savings
Payback
Miami, FL - 12x5
31.5
 215 -$22,968
$7,946
Instant
 Houston, TX - 12x5
 31.5  419  -$22,968  $7,959  Instant
 Phoenix, AZ - 12x5
 23.5  329  -$7,071  $5,976  Instant
 Memphis, TN - 12x5
 34.2  542  -$28,302  $9,232  Instant
El Paso, TX - 12x5
 16.0  489 $8,033
 $7,024  1.14
 San Francisco, CA - 12x5
 5.6  289  $2,8896  $1,903  15.18
 Baltimore, MD - 12x5
 26.3  593 -$1,2673
 $9,852  Instant
 Albuquerque, NM - 12x5
 12.4  500 $15,157
 $8,677  1.75
 Salem, OR - 12x5
 11.7  500  $16,538  $5,778  2.86
 Chicago, IL - 12x5
 23.9  730  -$7,701  $11,222  Instant
 Boise, ID - 12x5
 14.1  658  $11,897  $9,658  1.23
 Burlington, VT - 12x5
 16.7  790  $6,531  $12,061 0.54
 Helena, MT - 12x5
 10.1  828  $19,809  $11,917  1.66
Duluth, MN - 12x5
 6.3 871
 $27,327  $13,914  1.96
 Fairbanks, AK - 12x5
 5.3 1,067
 $29,364  $19,808  1.48

Net capital expenditure includes the cost of the Airxchange wheel system minus the savings due to smaller HVAC system.
 
Cities are representative cities according to Department of Energy Climate Zones ERV net capital expenditure and savings based on AIRX Estimator for DX Systems. 
 
Assumptions Used for this analysis:

Outside Air (CFM) 10000
ERV install cost per CFM $4.00
Unit install cost per ton $2,000.00
EER of HVAC 10
Electric rate ($ per kWh) $0.08
Demand Charge per KW $8.00
Gas rate ($ per therm) $1.00