Premium Ventilation1

Eugene Water & Electric Board

Premium Ventilation2

Review Recommendations for Premium Western Economizer

• Primary sensor control location

• Two-stage thermostat & coordination

• Differential dry-bulb outside air changeover

• Adequate air flow and exhaust relief

• Ventilation control

• Quality Assurance

Premium Ventilation3

Desired Sequence

• Min OSA ventilation during heating

• Use ventilation before cooling

• Use full OSA vent with cooling coil

• Lock out or Change over from ventilation to minimum when OSA too warm

Premium Ventilation4

Premium Ventilation

• Start with a Western Premium Economizer

• Upgrade the Economizer module with – DCV capable economizer control module

– CO2 Sensor; Min air set to 0% = leakage

• Add variable speed fan motor– Full (or near full) speed in heating or cooling– Low (30%) speed in idle mode

Premium Ventilation5

Triple the Savings

• Premium Economizer Savings, plus

• Fan savings when not heating or cooling

• Savings during warm-up by reducing ventilation when not occupied

• Ventilation heating and cooling savings when building not fully occupied

• No need to set and measure outside air minimum

Premium Ventilation6

Regional Savings

0

2,000

4,000

6,000

8,000

10,000

12,000

PhoenixAZ

Sac'toCA

Eugene OR

Boise ID

Burl'ton VT

ChicagoIL

MemphisTN

HoustonTX

HV

AC

kW

h p

er

10

00

sq

ua

re f

ee

t Remaining Fan & Aux

Remaining Cooling

Remaining Heating

Evap pre-cool

VSD fan

DCV

Integrated Economizer

warmup cycle

Strip Heat lockout

Optimum Start

Total ECM Savings

Base Total HVAC

Premium Ventilation7

New Units or Retrofit

• Retrofit VSD Options– ICM CC750– Fan Handler

• Both use temperature control strategy

Premium Ventilation8

Currently Custom Incentives

• Move towards rebate approach

• Two contractors have proposals for work

• New Construction and Replacement market