Thermal Physics & Calculations: From Theory to kWh and Euros

Thermal performance calculations and kWh savings

Here theory becomes practice. We move beyond vague technical terms and translate building physics into real numbers. Through our digital laboratory (the "10x10 Model"), we precisely measure how many kilowatt-hours (kWh) you save with each construction intervention.

Discover how your home behaves energetically, how thermal bridges drain your wallet, and see the complete financial analysis (ROI) proving that insulation is the safest investment you can make.

Basic Thermal Physics

Decoding the science behind insulation. Learn the basic rules governing how quickly a space cools or heats, so you can choose the right materials with engineering confidence.

U-Value (Thermal Transmittance)

The "king" of energy terms. Learn what U-Value measures and why the lower the number, the fuller your wallet stays.

Thermal Capacity vs Thermal Resistance

Why are old stone houses cool in summer but freezing in winter? An analysis clarifying "storing" vs "blocking" heat.

Thermal Time Lag: Insulation in summer

The secret to reducing air conditioning use. How the right materials delay midday heat until late evening.

Dew Point: Why walls sweat

The mechanism behind the mould nightmare. How temperature difference and humidity create droplets on your walls.

Heat transfer: Conduction, convection, radiation

The three pathways of heat loss. Understand how energy escapes your home to know exactly where to strike.

The role of orientation (North vs South)

The same room behaves differently depending on where it faces. How to adjust insulation thickness per façade.

Heat Loss Calculations (10x10 Model)

Welcome to our digital laboratory! We use a typical Greek 100 sq.m. house (the 10x10 Model) to run realistic savings scenarios. The mathematics of insulation... without the complex mathematics.

What is the 10x10 House? (Assumptions & Data)

The "Article Zero" of our guide. Dimensions, building materials and assumptions on which all cost calculations are based.

Uninsulated vs Insulated: kWh calculation

The moment of truth. We convert heat losses into euros and see how much money an uninsulated house literally "throws away" each winter.

Changing thickness 5cm to 10cm: How much difference?

What-if scenario: Is paying more for double EPS thickness worth it? See the exact annual consumption difference.

Windows: Single vs Energy-efficient glazing

How many kWh do we save by just replacing old aluminium frames with new thermally broken energy-efficient windows?

Furnished vs Empty: Furniture as thermal battery

An unexpected parameter. How sofas, bookshelves and carpets absorb and return heat, changing the space dynamics.

Heating capacity (BTU/kW) before and after

Before buying an AC or boiler, see how insulation lets you buy much smaller (and cheaper) equipment for the same area.

Thermal Bridges & Dynamic Behaviour

They are the "invisible holes" of the construction. Points where cold finds a free path inward. Identify thermal bridges and learn how proper construction detailing eliminates them permanently.

What are thermal bridges and how much do they cost?

Why a single uninsulated concrete column can cancel the insulation of the entire wall.

Corners, balconies and beams: The weak points

Mapping the "suspect" points in every Greek apartment block where the biggest thermal leaks occur.

Building thermal bridges - detection and treatment

How ETICS eliminates thermal bridges

The biggest advantage of external insulation: how "wrapping" the building from outside interrupts contact with the cold.

Thermal breaks in balconies (Isokorb)

How do we insulate a protruding balcony? Thermal break technologies for buildings under construction.

Linear Thermal Transmittance (Ψ-value)

What is the Ψ (Psi) coefficient, how it measures flow at junctions and how it affects the overall building study.

Financial Analysis & Payback (ROI)

Insulation is not an expense - it's an investment with guaranteed returns. See detailed data on how energy upgrading increases your property's market value and how quickly it pays for itself.

Payback Period of insulation investment

The ultimate financial criterion. How many years until energy bill savings fully cover material and labour costs.

Insulation impact on property resale value

Selling or renting? How a "green" insulated home attracts better tenants and sells at a significant market premium.

Financial analysis and insulation investment ROI

Lifecycle Cost: Why the cheapest costs more

Don't just look at the purchase price. We analyse total lifecycle cost (maintenance, wear, performance) over 20 years.

Heat pump vs Natural gas in an insulated home

When heat demand drops dramatically, the equation changes. Which heating system performs best in a well-insulated envelope?

Energy Performance Certificates (EPC)

From class G to A+. What the EPC practically means, when it's mandatory and how it increases property value.

Main insulation guide

Return to the complete insulation guide.

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