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Ice damning
A phenomenon that occurs when melting
snow refreezes at the eaves and
traps water from snow melting from the upper part of the roof.
ID
An abbreviation for inside diameter, referring to pipe
measurements.
Ignition electrodes
On an oil burner, a pair of
electrical elements located in the blast tube
to provide a spark that ignites the oil. incorporates vertical webbing
into its configuration.
Induced draft fan
A fan that pulls combustion
byproducts through a furnace or boiler,
ensuring good draft and reducing heat loss.
Insulator
A material that offers a high resistance
to an electric current flowing through it.
Interlayment
Roofing felt installed between courses of
wood shakes.
Intermittent pilot
A pilot which lights only on a
call for heat. |