TWTTHERMAL WALLTECHNOLOGY
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MODELED ECONOMIC SCENARIOS

Modeled Energy-Cost Scenario

Illustrative annual electricity-cost comparisons across three building-system scenarios.

1

Standard Wood Frame

Baseline
Illustration of a standard wood-frame wall assembly
  • Standard wood-frame home
  • ~12,000 kWh/yr electricity use
  • Full utility rates
2

TWT + MPC RES

Optimized grid-powered model
Thermal Wall system with hydronic tubing
  • TWT + MPC + hot water reserve
  • ~2,200 kWh/yr off-peak equivalent
  • Grid-powered, but optimized
3

TWT + Solar + MPC RES

Lowest modeled grid dependence
Thermal Wall system with solar thermal and MPC controls
  • TWT + solar thermal + MPC + reserve
  • ~850 kWh/yr off-peak equivalent
  • Solar pre-charging reduces grid reliance

2030 ILLUSTRATIVE ANNUAL ELECTRICITY COST

Modeled rate: 19.83¢/kWh (U.S. average residential)

Projected rate: 19.83¢/kWh

Standard Wood Frame~12,000 kWh/yr
$2,380 / yr
TWT + MPC RES~2,200 kWh/yr
$305 / yr
TWT + Solar + MPC RES~850 kWh/yr
$118 / yr

Annual electricity cost (USD)

2030–2070 ILLUSTRATIVE ANNUAL COST COMPARISON

All values in USD. Costs will vary with future electricity rates and conditions.

YearModeled rate
(¢/kWh)		Standard wood frame
(~12,000 kWh/yr)		TWT + MPC RES
(~2,200 kWh/yr off-peak eq.)		TWT + solar + MPC RES
(~850 kWh/yr off-peak eq.)		Annual savings
(solar TWT vs. wood frame)
203019.83$2,380 / yr$305 / yr$118 / yr$2,262 / yr
204026.50$3,180 / yr$408 / yr$158 / yr$3,022 / yr
205035.50$4,260 / yr$547 / yr$211 / yr$4,049 / yr
206044.50$5,340 / yr$685 / yr$265 / yr$5,075 / yr
207058.00$6,960 / yr$893 / yr$345 / yr$6,615 / yr

Why the modeled costs differ

Wood frameFull exposure to grid-price increases.

TWT + MPC RESLower load and off-peak shifting.

TWT + solar + MPC RESSolar thermal and minimal grid top-offs.

KEY MODEL ASSUMPTIONS

  • 2,500 sq. ft. illustrative home
  • U.S. average residential electricity rates (illustrative)
  • All-electric residential profile (no natural gas)
  • MPC shifts 100% of heating and cooling load to off-peak hours
  • Solar thermal provides 80%+ of thermal pre-charge
See all assumptions in detail