This passive house savings calculator takes the figures you already have and applies the relationship behind passive house savings calculations for you, giving investment returns after, construction cost and energy demand from construction cost, energy demand, additional investment, energy demand, additional investment, energy demand, gas price, gas to k wh, size and one way.
What Is the Passive House Savings Calculator?
The passive house savings calculator works out investment returns after, construction cost and energy demand from construction cost, energy demand, additional investment, energy demand, additional investment, energy demand, gas price, gas to k wh, size and one way.
Biological relationships are usually approximations rather than exact laws, so the output is best treated as an estimate with a sensible range around it.
How the Passive House Savings Calculation Works
The calculation applies the relationship as published, step by step, so each intermediate value can be checked against the underlying theory.
Keep the units consistent throughout. Mixing a percentage with a proportion is the single most common source of an answer that is out by a factor of a hundred.
Assumptions Worth Knowing
Any relationship used here assumes a constant rate, a representative sample, or a stable population. Real populations rarely meet those conditions for long, so treat the answer as a guide.
Where the inputs are field measurements, a single misread value can shift the result noticeably. Measure carefully and record what you used.
A Worked Example
Working through an example, with construction cost set to 10, energy demand set to 5, additional investment set to 2, the calculator returns construction cost of 100, and energy demand of 50, and gas usage of 0.5. Substitute your own figures and the same steps produce the same kind of answer.
Frequently Asked Questions
What do I need to work out investment returns after?
Enter construction cost, energy demand, additional investment, energy demand, additional investment, energy demand, gas price, gas to k wh, size and one way. The calculator then works through the relationship and reports investment returns after, construction cost and energy demand.
What does the passive house savings actually calculate?
It takes construction cost, energy demand, additional investment, energy demand, additional investment, energy demand, gas price, gas to k wh, size and one way and converts them into investment returns after, construction cost and energy demand using the standard relationship for this problem. Each step is applied in turn, so every output is traceable back to the numbers you typed in.
How should I enter construction cost?
Use the value you actually have, in the unit shown next to the field. Enter every value in the same unit system. The calculator assumes the figures you supply are consistent, so it cannot correct a mistake that happens before the calculation starts.
Can I use this for a quick estimate as well as a precise answer?
Yes. The calculator is built for quick checks, so round your inputs to a sensible number of significant figures and the result will be just as useful. If you need more precision, keep the same method and add digits to the inputs rather than adjusting the method itself.
Does anything you type get stored?
No. The whole calculation runs inside your browser, and nothing you enter is uploaded, logged or sent anywhere.