ROSE Construction Method™ Residential Performance Targets

GRADES                                                                       HERS Index Targets                                                                                                                           
Energy Star - 5 Star+, Indoor Air Plus V3.0                                         <64-79*

1.  ROSE BASE LEVELS                                                                                       <60

  • ROSE Construction Method Building Envelope w/HRV                                        
  • 95% efficient, fuel-fired, heating plant and hot water systems
  • Rough-ins for possible (future) geothermal, solar thermal, and solar PV additions

 

                                                                              
1a.  ROSE Construction Method Building Envelope w/HRV                            <45

  • 95% efficient, fuel-fired, hot water  tank w/built-in heat exchanger
  • Solar thermal panels (limited to domestic hot water needs)
  • Air-Air Heat pump(s) or equivalent

1b.  ROSE Construction Method Building Envelope+ w/HRV                          <30

  • E-Max Hybrid™ whole house geothermal-solar system using:
  • Water-Water or Water-Air Heat pump(s) or equivalent
  • Solar thermal panels with dedicated solar storage tank and on-demand

(peaking) water heater

2.  NEAR ZERO NET ENERGY

  • ROSE Construction Method Building Envelope+ w/HRV                           <15
  • E-Max Hybrid™ whole house geothermal-solar system using:
  • Water-Water or Water-Air Heat pump(s) or equivalent
  • Solar thermal panels w/solar storage tank, and on-demand (peaking) water heater
  • Solar PV or other renewable power source for partial electrical offset

3.  ZERO NET ENERGY

  • ROSE Construction Method Building Envelope+ w/HRV                             < 0
  • E-Max Hybrid™ whole house geothermal-solar system using:
  • Water-Water or Water-Air Heat pump(s) or equivalent
  • Solar thermal panels w/solar storage tank and on-demand (peaking) water heater
  • Solar PV or other renewable power for total electric annual (zero net metering) offset

4.  OFF-GRID OPERATION

  • ROSE Construction Method Building Envelope+w/HRV                         <<0
  • E-Max Hybrid™ whole house geothermal system w/expanded solar and thermal storage
  • Water-Water or Water-Air Heat pump(s) or equivalent
  • Expanded PV solar and/or other renewable power generation w/battery storage and back-up power generator

*Based on a published sample of 10 homes in climate zones 2, 3, and 4