Bryant HEAT RECOVERY VENTILATOR HRVBB Troubleshooting Guide download pdf (Page 14)

FIGURE 3

An HRV installed with a forced-air furnace system

High-efﬁciency motors

Several years ago, manufacturers started to introduce a high-

efﬁciency motor option for some residential furnaces. Today, most

motor manufacturers have an electronically commutated, brushless,

direct current (DC) motor option (High Efﬁciency). These high-

efﬁciency motors are referred to as “EC,” “ECM,” “BLDC” or

“DC” motors, depending on the manufacturer.

As well as furnaces, these motors circulate the air in homes where

an HRV system is either direct-ducted or uses the ductwork of

a forced-air furnace. Furnaces with high-efﬁciency motors are

recommended for use with HRVs, because they can be run at a low

speed with low noise and use less electricity.

If you are purchasing a new furnace or plan on installing an

HRV, consider buying a furnace with a high-efﬁciency motor.

A furnace with a high-efﬁciency motor is more efﬁcient than

an equivalent furnace with a conventional, or PSC motor. In

homes where the fan is run continuously or for extended periods,

a high-efﬁciency motor can reduce electricity consumption and

provide better air circulation. A brushless DC motor can reduce

average furnace electrical consumption by more than 70 percent,

Kitchen

Furnace

Heat

transfer

Return air

Fresh air

Exhaust air

Living room

Bedroom

Stale air

exhaust

ducts

Furnace

distribution

ducts

Furnace main

return air duct

Laundry Bathroom

*Furnace return air may come from more than one location.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 35 36

No comments

Bryant HEAT RECOVERY VENTILATOR HRVBB Troubleshooting Guide Page 14