Insulation/ CALCULATOR

Insulation heat and energy savings

Screen the annual transmission-heat, purchased-energy and cost reduction from improving one building element.

Insulated element aream²Use the net wall, roof or floor area represented by both U-values.

U-value before improvementW/m²·KInclude the whole existing assembly, not only the insulation layer.

U-value after improvementW/m²·KUse the proposed whole-assembly value including thermal bridges where available.

Annual heating degree-daysK·day/yearUse a local long-term value with the base temperature stated by its source.

Delivered heat per purchased energykWh/kWhUse seasonal efficiency for a boiler or seasonal performance factor for a heat pump.

Purchased-energy pricecurrency/kWhEnter a comparable all-in marginal price in one currency.

Transmission heat saved

7,776 kWh/year

Purchased energy saved

8,640 kWh/year

Estimated annual cost saving

1,296 currency/year

U-value reduction

75.0 %

Steady one-dimensional transmission represented by the entered whole-element U-values and heating degree-days. Indoor setpoint, solar and internal gains, wind, air leakage, thermal bridges, moisture, system cycling, rebound, cooling and tariff changes are not modelled separately. This is a comparison screen, not an energy certificate or investment guarantee.

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