Field-controls IAQ11 User Manual download pdf (Page 6)

FRESH

How It Works

The Fresh Air System consists of two components: The

Healthy Home System Control (HHSC) and a Fresh Air

Damper (FAD or MAS). An intake air hood may also

be required and is included with the MAS. The HHSC

is connected directly to the HVAC system fan and

automatically engages the fan whenever additional fresh

air is needed based on a predetermined schedule.

When the central fan is engaged, the Fresh Air Damper

opens to allow fresh air to be pulled into the return air

plenum where it is mixed with conditioned air, filtered (if

a media air cleaner is installed), and distributed to the

rest of the home via the duct system. The FAD opens and

closes based on the scheduled program of the HHSC.

The MAS is pressure activated and opens automatically

whenever the fan is engaged and remains closed when

the fan is inactive.

FRESH

RETURN AIR DUCT

FURNACE

AC COIL

Intake Air

Hood

Damper

Fresh Air. Who needs it?

We do. Every home needs fresh air, too. Efforts to make

homes more energy efficient prevent fresh air from

entering the home and can lead to compromised air

quality and appliance inefficiency. Weather stripping,

caulk, sealants, and moisture barriers such as Tyvek

tighten the home, reducing air changes and locking stale

air inside. Plus, when a home can’t breathe, laundry

dryers, range hood fans, bathroom fans, and heating

appliances take more time to do their jobs, wasting

precious energy.

The lack of fresh air ventilation has become such a

problem, HVAC engineers have developed a new

standard (ASHRAE 62.2) specifying the minimum air

changes needed in any given residence. In many states,

fresh air ventilation is required to meet building codes

for new construction or to obtain energy tax credits in

existing homes.

The Field Controls Fresh Air System meets these

requirements by delivering fresh air automatically,

year round.

• Delivers fresh air automatically, year round

• Enables system to meet ASHRAE 62.2

ventilation standard

• Creates uniform temperature and humidity

throughout the home

• Enhances effectiveness of whole house

filtration and air purification

Benefits

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Field-controls IAQ11 User Manual Page 6

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