Air demands of residential combustion appliances

Conference · Sun Jan 01 04:00:00 EST 1984 · Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States)

OSTI ID:5762349

Hayden, A C.S.

Combustion appliances generally require air both for combustion itself and for dilution. The dilution device, known as the barometric damper on an oil system or as the draft hood on a gas system, is located downstream of the furnace heat exchanger and takes no part in the combustion nor heat exchange processes. It is primarily designed to isolate the combustion system from outside pressure fluctuations. However, it does represent the major air requirement of the heating system, typically at lead 3 times the air required for combustion. New oil- or gas-fired combustion systems, either under development or just reaching the market place, eliminate the dilution device and forcibly exhaust the combustion products either with a fan or a powerful combustion pulse. Such appliances, with their high efficiency and low air demand are well-suited to the low energy consuming homes of today. The combustion appliance requiring the most air is the fireplace. While new housing has an air change of 0.5 per hour or less, fireplaces can require nearly three-times this amount. Small airtight woodstoves, on the other hand, have little need for air. The fireplace under high fire, with its high draft and air demand can force reversal of the stack flow of the central furnace. On low fire, the reverse can occur, with incomplete combustion products from the fireplace or even a wood stove released into the living space. Experimental and field determinations of the air demands of the various appliances are presented, along with recommendations for solutions to the increasing problems with tight housing.

• Research Organization: Canadian Combustion Res. Lab., Ottawa
• OSTI ID: 5762349
• Report Number(s): CONF-840612-
• Conference Information: Journal Name: Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States) Journal Volume: 2
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320101* -- Energy Conservation
Consumption
& Utilization-- Residential Buildings-- (-1987)
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
AIR
AIRTIGHTNESS
APPLIANCES
BLOWERS
BUILDINGS
BURNERS
CHEMICAL REACTIONS
COMBUSTION
CONTROL EQUIPMENT
DATA
DILUTION
DRAFT CONTROL SYSTEMS
EQUIPMENT
EXHAUST GASES
EXPERIMENTAL DATA
FIREPLACES
FLOW REGULATORS
FLUIDS
FURNACES
GAS APPLIANCES
GASEOUS WASTES
GASES
HEAT EXCHANGERS
HOUSES
INFORMATION
NUMERICAL DATA
OIL BURNERS
OXIDATION
PRESSURE DEPENDENCE
RECOMMENDATIONS
RESIDENTIAL BUILDINGS
THERMOCHEMICAL PROCESSES
VENTILATION
WASTES