Before The Architect - Articles - Indoor Air Quality

HVAC Air Quality

BEFORE THE ARCHITECT – HOME DESIGNING BACKGROUND – UNIQUE HOME DESIGNING ARTICLES

HOME BUILDING PROBLEMS - INDOOR HOME AIR QUALITY

From time to time, people lie to me. Straight out lie. "I will send you . . ." "I will call you . . ." "I will write you . . ." I will pay you . . ." Or words to that effect, both written and spoken. And then they don't do what they wrote or spoke. I loathe and despise that behavior to my core. That behavior diminishes the fundamental value of society, degrades our human capability and potential, stains me for even bearing its witness let alone bearing its consequences. Before The Architect

hOME BUILDING PROBLEMS - INDOOR HOME AIR QUALITY - HVAC, FURNACE, FIREPLACE, DRYER, ETC.

INDOOR HOME AIR QUALITY

A furnace shall be direct vent or power vent

A hot water heater may be a direct vent or power vent

Laundry clothes dryer venting

	Shall be sited as far as possible from exterior-mounted HVAC compressors and
	Not less than out of line of sight

An HVAC professional shall be consulted and contracted in applications with back draft potential or exhaust insufficiencies, indicative of which but not to the exclusion of others

Exhaust conduit runs beyond manufacturer specification

Well-sealed building envelopes

Multiple fireplaces

Major exhaust volumes from, for example,

	A large cfm range and oven exhaust fan
	Several bath and/or other exhaust fan

A multi-flue chimney shall be constructed such that each flue at its terminus

Shall be permanently and completely separated physically

	From its abutters
	From crown top of face to rain cap bottom of face
	From chimney side to chimney side, as by a full-length partition

Shall be not less than 10 linear inches on the vertical to the rain cap bottom of face

Shall otherwise be parted between flues to not less than manufacturer’s specifications

Without regard to any other backdraft safety measures

Comment: Notably for gasser inserts, siting flues too close together requires setting the flue termini at different, unlikely attractive, elevations. Spreading those flues at or beyond manufacturer’s or others’ specifications may be a practical and artful remedy.

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