Heat Loss - calculation of the heat load, thermal envelope, radiators

Name

Date

Upload from file

Project name

Advanced

City

External design temperature t_e, °C

Annual mean external temperature t_m, °C

Heating degree-days D_d, °C • day

Internal design temperature t_int, °C

Air temperature of adjacents heated rooms t_a, °C

Height of the ground floor above ground level H_g, m

Building density

None

Normal

Intensive

Orientation

Advanced

Help

City

t_e, °C

t_m, °C

D_d, °C • day

Country

City

External design temperature t_e, °C

Annual mean external temperature t_m, °C

Heating degree-days D_d, °C • day

Help

Insulating

Universal

Constructive

Name

ρ, kg/m³

λ, W/(m • K)

Insulating

Universal

Constructive

Name

Density ρ, kg/m³
Optional

Thermal conductivity λ, W/(m • K)

Name	R_tot, (m² • K)/W

Name

Thermal resistance R_tot, (m² • K)/W

Room name

t_int, °C

Room name

Internal air temperature t_int, °C

Name

R_tot, (m² • K)/W

U, W/(m² • K)

Project name

Date

Envelope name

R_tot, (m² • K)/W

U, W/(m² • K)

Help

Label

Underground floor depth z, m

Roof cladding

None

Normal

Reflective

Basement

Without
windows

With
windows

Adjacent room

Heated

Unheated

Ventilated facade

Thermal resistance R_tot, (m² • K)/W

Materials

Name

d, mm

λ, W/(m • K)

Advanced

Result

Not all data are entered.

Label

Thermal resistance R_tot, (m² • K)/W

Wall height H, m

Underground floor depth z, m

Ventilated facade

Materials above ground

Name

d, mm

λ, W/(m • K)

Materials underground

Name

d, mm

λ, W/(m • K)

Advanced

Result

Not all data are entered.

Label

Thermal resistance R_tot, (m² • K)/W

Advanced

Above ground

Underground

	Internal air temperature t_int,°C
	Relative humidity of internal air φ_int, %
	External air temperature t_e,°C
	Dew point temperature t_dp,°C
	internal surface temperature of the envelope t_si,°C
	Difference between the temperature of inside air and the envelope surface Δt,°C

Search

Name

ρ, kg/m³

λ, W/(m • K)

Search

Name	R_tot, (m² • K)/W

LE – low-emissivity glass coating.

Name

Level, m

Floor name

Floor level L, m

Floor height H, m

Floor area A, m²

Floor perimeter on external walls P, m

Help

No

Name

Φ_room, kW

Result

No rooms.

Room number	Room name
Room area A, m²	Internal design temperature t_int, °C

Envelopesthis room

Name

Orien-
tation

a, m

h, m

A_k, m²

Thermal bridges

Name

l, m

Ventilation

Supply and
exhaust

Exhaust

None

Air flow

Rate

Air terminal device

		Supply air temperature t_sup, °C
		Supply air exchange rate n_sup, h^-1
		Supply air flow q_sup, m³/h
		Exhaust air exchange rate n_exh, h^-1
		Exhaust air flow q_exh, m³/h
		Мinimum air exchange rate n_min, h^-1

Advanced

Result

Not all data are entered.

No label

With label

No

Name

Φ_room, kW

Φ_rad, kW

Designation

Parameter

n, pcs

Heat medium

β

Φ_design, kW

Φ_{req i}, kW

Φ_{rad i}, kW

Reserve, %

Help

Radiator manufacturer

Radiator model

Heat loss compensated by radiator Φ_design, kW

−

+

Number of radiators n, pcs

Heat medium

Supply water temperature T1, °C

Return water temperature T2, °C

Result

Designation:

=

Required capacity of the radiator Φ_{req i} = kW

Actual capacity of the radiator Φ_{rad i} = kW

No label

With label

Search

Room name

t_int, °C

No

Name

Editable parameter

No

Name

Test 1

Test 2

Projects

Project

Settings

Building density

Orientation

Thermal bridges

Database

Climatology

Climatology

Materials

Material

Products

Product

Internal temperature

Internal temperature

Envelopes

Import

Envelope

Envelope

Roof cladding

Basement

Adjacent room

Materials

Result

Hybrid wall

Materials above ground

Materials underground

Result

Envelope

Infographics

Materials

Products

Floors

Floor

Rooms

Result

Room

Envelopesthis room

Envelopesadjacent room

Thermal bridges

Ventilation

Result

Infographics

Radiators

Radiator

Heat medium

Type of installation

Result

Infographics

Internal temperature

Edit

Import