CUSTOM HOMES ///ONLINE PLANS ///ENERGY EFFICIENCY /// ABOUT/// HOME
Custom Rastra® Jarales, NM Residence Cost/Savings Report
EPA-NREL Energy-10 Summary Page Jul 01, 2003
Description: 2x6 Wood Frame Reference Case
Rastra ® Block Low-Energy Case
Performance Notes: Weather file: ALBQRQUE.ET1 ALBQRQUE.ET1 equal Floor Area, ft² 2622.0 2622.0 equal Wall Area, ft² 1881 1881 equal Volume, ft³ 23598.0 23598.0 equal Wall Construction 2 x 6 frame, R=17.7 9.5" Rastra®, R=39.0 Rastra® Block eliminates air leakage, is made from recycled newsprint, styro bead, concrete, and rebar
Roof Construction flat R=38.0 HD batt flat R=42.0 Wet Cellulose Blown-in wet cellulose insulation is recycled newsprint, glue, treated with anti-insect Borax Roof Area, ft² 2622 2622 equal Window Type 4060 single, alum, U=1.20 4060 low-e al/b, U=0.31 Vinyl coated double pane low-e windows outperform old models. Window Shading None 40 deg latitude Shading S & W windows during summer prevents overheating. Window Area, ft² 432 360 Fewer windows on N & E prevents heat losses during winter months. Windows (N/E/S/W:Roof) 8/1/6/3:0 3/1/10/1:0 see above, rotation of the building on site plan is sun study modeled for passive solar. Floor type Slab on Grade, Reff=13.9 24" beadboard insulation Slab on Grade, Reff=31.4
Code now requires 24" ht R-4.35 (to R-7) beadboard surrounding foundation stems, although Rastra® and other Concrete forms include it.
Added mass? none 1311 ft², 8in cmu Energy is stored only in plants, matter, earth-soils ie: mass. Now that your home is warm, store that energy to slow the temperature differentials in equivalent mass to freestanding interior partions, adobe, bancos, increased slab depth or a solar slab. HVAC system Gas Furnace eff=80,EER=1.0
High Efficiency Gas Boiler eff=90,EER=13.0
Shop for higher EER (or SEER) rated HVAC equipment or Eco-Star® rated ones, rather than sending fuel dollars up the chimney.
Infiltration, in² ELA=250.2 ELA=67.7 Seal up the air leaks at all possible openings including ducts. Perform an air leakage pressurizing fan test on frame construction. Heating thermostat 70.0°F, no setback 70.0°F, setback to 65.0°F Programmable thermostats are a must, and learn to set them. Swamp Cooling thermostat 78.0°F, no setup 78.0°F, setup to 83.0°F see above Energy use, kBtu 158181 58905 99,276 kBtus saved ! Annual Energy cost, $ 916 663 $ 253 per year saved ! Total Electric, kWh
Internal/External lights, kWh
Heating/Cooling/Fan, kWh
Hot water/Other, kWh
Peak Electric, kW
10011
2060/225
0/0/1481
0/6245
2.0
8111
1545/168
0/0/143
0/6245
1.5
1900 kWh saved
Compact Flourescents
1338 kWh saved
equal, hot water use
75% less Peak Power, less peak power draw, less need for building nuclear, gas and coal fired power plants, less pollution, less water use, less infrastructure footprint on the land, less health impacts.
Emissions, Pollution, lbs
CO2/SO2/NOx
28102/93/57
14590/68/37
Less lbs Ann Pollution:
13512/25/20
Construction Costs, $ 101364 111153 $ 9789 more up front (primarily in HVAC, t-stats, lighting, insulation and windows) Life-Cycle Cost, 35 years 161612 160500 $ 1112 operating payback profits you, our community, ecology and economic health.
Results of Energy-10 programming are not guaranteed but, represent best predictions in given postulates. Energy-10 has been developed by the EPA, National Labs, DOE and SBIC for public benefit and use.
Green? More sustainable home design is cost effective in the present economy as you can see in the report above. Beyond these industry and builder methods, additional energy and water savings paybacks may be realized with construction industry, national laboratory and university research, Department of Energy and State programs or codes.
See further links to Knowledgeable Resources, Workshops and Events, or Books