iAIRE outside air estimator

> REGIONAL ASSUMPTIONS
CITY AND STATE:

HOURS OF OPERATION:
12am - 4am	4am - 8am	8am - 12pm
12pm - 4pm	4pm - 8pm	8pm - 12am

DAYS PER WEEK:
CFM OF OUTDOOR AIR:
NOT SURE? CLICK HERE TO ESTIMATE ESTIMATE OUTDOOR AIR VOLUME BY SQUARE FOOTAGE* FT² * Estimates of outdoor air volumes by building area are generated from the Pacific Northwest National Laboratory publication, "Achieving The 30% Goal: Energy and Cost Savings Analysis of ASHRAE Standard 90.1-2010" (Table 4.14) or default values from ASHRAE Standard 62.1-2010. These are estimates only. For actual airflows, consult with your engineer.
> INPUT UTILITY RATE ASSUMPTIONS
ELECTRIC RATE ($/kWH):
PEAK DEMAND CHARGE ($/kW):
MONTHS OF PEAK DEMAND CHARGE:
GAS RATE ($/therms):
> INPUT EFFICIENCY RATINGS
HEATING EFFICIENCY (%):
COOLING EFFICIENCY (EER):
ECONOMIZER EFFECTIVENESS (%):
HVAC FAN POWER ( % OF TOTAL SYSTEM):
> COST ASSUMPTIONS
INSTALLED COST PER TON ($):
INSTALLED COST OF ECONOMIZER CONTROLLER ($):

$/therm; $/kWh; $/kW Demand Charge
EER; % Heating Efficiency; % Airxchange Effectiveness
x Operation; CFM OA

ENERGY ANALYSIS
COOLING CAPACITY SAVINGS (tons):
HEATING CAPACITY SAVINGS (mbh):
PEAK DEMAND REDUCTION (kW):
ANNUAL COOLING ENERGY SAVED (kWh):
ANNUAL HEATING ENERGY SAVED (mbtu):
ANNUAL OPERATING COST ANALYSIS
COOLING OPERATING COST (savings):	$
PEAK DEMAND COST (savings):	$
HEATING OPERATING COST (savings):	$
TOTAL:	$
CAPITAL EXPENSE ANALYSIS (RETROFIT)
ANNUAL OPERATING SAVINGS:	$
COST OF ECONOMIZER SYSTEM:	$
PAYBACK PERIOD (years):
ANNUAL ROI (%):
CAPITAL EXPENSE ANALYSIS (NEW SYSTEM)
CHANGE IN COST OF HVAC UNIT (Year 1 savings):	$
COST OF ECONOMIZER SYSTEM:	$
NET CAPITAL EXPENDITURE:	$
PAYBACK PERIOD (years):
ANNUAL ROI (%):


This program is designed to generate a financial analysis for HVAC systems that utilize Airxchange energy recovery wheels. The program uses ASHRAE weather data and ASHRAE 97.5% design days for the cities listed. Utility rates and installed costs vary depending on location and equipment selection. Default values are provided in order to demonstrate estimator results. For actual rates and installed costs, consult your local utility and HVAC contractor. * Estimates of outdoor air volumes by building area are generated from the Pacific Northwest National Laboratory publication, "Achieving The 30% Goal: Energy and Cost Savings Analysis of ASHRAE Standard 90.1-2010" (Table 4.14) or default values from ASHRAE Standard 62.1-2010. These are estimates only. For actual airflows, consult with your engineer.

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