The surface condensation can be controlled by either maintaining the surface temperature higher than the dew point temperature or remaining the partial vapor pressure in the air below the saturation level.
To control the surface condensation with above-mentioned strategies, the surface condensation risk needs to be predicted in advance in relation to heat and moisture transfer in building construction.
Despite their usefulness, these models are not directly applicable to controlling the surface condensation for two reasons.
For the cases shown, VENT-II and CFD modeling agree qualitatively on presence of net surface condensation (continuously "wet" or "dry" conditions), which is consistent with the relining guidelines of the NFGC venting tables.
The first 10 cases, for a double brick chimney (no clay tile liner), show that the most influential parameter with respect to net surface condensation (i.e.
A similar phenomenon (i.e., limited distance of attack) occurs when the fluid is highly conductive, but the fluid is limited to a thin film such as a
surface condensation film.