Infrared Thermal ImagingInfrared Thermal Imaging

Heat Loss IdentificationHeat Loss Identification

Sea View from BisphamSea View from Bispham

-18.4C

27.9C

-10

0

10

20

The The temperatures temperatures show as show as different different colourscolours

South from BisphamSouth from Bispham

The sky The sky shows as shows as very cold very cold where there where there is no cloud is no cloud covercover

-30.0C

17.5C

-30

-20

-10

0

10

How heat loss How heat loss occursoccurs

Most buildings have a Most buildings have a double wall & cavity double wall & cavity construction. Heat is construction. Heat is radiated & radiated & convectedconvectedfrom the inner room to from the inner room to the inner wall. Heat is the inner wall. Heat is then transferred through then transferred through the inner wall by the inner wall by convectionconvection

Inner Room

Heat Radiated & Convected to the atmosphere

Co

nve

ctio

n

Co

nve

ctio

n

How heat loss How heat loss occursoccurs

Most buildings have a Most buildings have a double wall & cavity double wall & cavity construction. Heat is construction. Heat is radiated & radiated & convectedconvectedfrom the inner room to from the inner room to the inner wall. Heat is the inner wall. Heat is then transferred through then transferred through the inner wall by the inner wall by convectionconvection

The cavity acts as a The cavity acts as a thermal barrier but some thermal barrier but some heat is still transmitted.heat is still transmitted.

Inner Room

Heat Radiated & Convected to the atmosphere

Co

nve

ctio

n

Co

nve

ctio

n

How heat loss How heat loss occursoccurs

Most buildings have a Most buildings have a double wall & cavity double wall & cavity construction. Heat is construction. Heat is radiated & radiated & convectedconvectedfrom the inner room to from the inner room to the inner wall. Heat is the inner wall. Heat is then transferred through then transferred through the inner wall by the inner wall by convectionconvection

The cavity acts as a The cavity acts as a thermal barrier but some thermal barrier but some heat is still transmitted.heat is still transmitted.

Heat is then transmitted Heat is then transmitted through the outer wall by through the outer wall by convection and is then convection and is then carried away by wind carried away by wind convection and convection and radiation.radiation.

Inner Room

Heat Radiated & Convected to the atmosphere

Co

nve

ctio

n

Co

nve

ctio

n

How heat loss How heat loss occursoccurs

Using cavity wall Using cavity wall insulation we can restrict insulation we can restrict the amount of heat loss the amount of heat loss by putting insulation into by putting insulation into the cavitythe cavity

Inner Room Less Heat

Radiated & Convected to the atmosphere

Co

nve

ctio

n

Co

nve

ctio

n

Cavity wall insulation