Serenity System Installed with a Heat Pump
Heat pump systems are one of the most efficient methods of heating and cooling. Utilizing a Serenity Forced Air Furnace with a heat pump allows the heat pump’s high efficiency to be combined with off-peak electric rates making this heating and cooling system the lowest operation cost option. In addition, the Serenity ensures comfort regardless of outdoor temperature.
In heat pump applications, the Serenity replaces the resistance strip heat or secondary heat, which is typically required as a supplement or backup to heat pump systems, with low cost, off-peak stored heat. As outside temperatures decline the stored heat in the Serenity is used in conjunction with the heat pump’s heating capacity to satisfy comfort requirements. During on-peak hours or when the demand for heat is at the point where the heat pump alone cannot satisfy the heating requirements, the stored heat is used to supplement the heat pump. The Serenity allows the heat pumps efficiency to be utilized even during cooler outdoor temperatures.
The Serenity/Heat Pump system offers significant benefits:
- Provides great comfort 24 hours a day
- Provides for a high efficiency, low cost heating and cooling system all in one
- Optimizes system performance by allowing the heat pump’s efficiency to be fully utilized
- Eliminates the cool discharge air temperatures associated with heat pump systems during low outdoor temperatures
- The Serenity/Heat Pump combination, when used with off-peak electric rates, is the most economical heating and cooling system available.
How the System Works
- The room thermostat in the home is set to desired comfort level. If room temperature decreases below the room thermostat set point, the system is energized to deliver heat.
- Upon a heat call from the room thermostat, the heat pump’s outdoor compressor unit is energized and warms the A-coil in the return air duct of the Serenity. At the same time, the Serenity’s supply air blower is energized.
- The supply air blower draws air from the home (shown at 68° F) across the air filter and the heat pumps A-coil extracting heat from the coil as it passes through it.
- A sensor monitors air temperature after the A-coil. If the air temperature is warm enough to provide comfort to the homeowner (generally 90° F or higher), the supply air blower simply delivers the warm heat into the home through the supply air duct. Air temperature after coil in the diagram is shown at 85° F.
- If air temperature after the heat pump coil is below a comfortable level (generally less than 90° F), the Serenity’s core blower will modulate low cost, “Off-Peak” stored heat into the duct stream so comfortable heat (generally 90° F or higher) can be delivered into the home.
- Since heat pumps generally have an operating efficiency of 150%-300% or greater (depending on outdoor temperature), the Serenity system first utilizes the heating ability the heat pump offers. If the heat pump doesn’t have the ability to satisfy comfort and space heating requirements, the Serenity system starts to work with the heat pump utilizing low cost, off-peak energy to ensure comfort for the user at all times. Combining the heat pump’s efficiency with the “Off-Peak” Serenity system yields very low operating costs for the end user along with great comfort.
100 percent efficient
No maintenance required
Built-in digital thermostat
Variable speed supply blower
Immediate heat response
Super insulated to minimize static discharge and surface temperature
Easy to read digital display
Five-year limited parts warranty
4200 series Serenity Forced Air Furnace
|Charging Input (kW)
|Single Feed: Minimum Circuit
Ampacity (includes 25% derate for continuous load)
|Charging Circuits Required
||2 – 60 AMP,
1 – 15 AMP
|Maximum Core and Supply Blower Load
|Blowers/System Controls Voltage
|Dimensions Including Air Handler
(W x D x H in inches)
|43” x 44” x 47”
|Duct openings (inches)
Supply Air Outlet
Return Air Inlet*
18.6” x 18.1”
16” x 16”
|Appropriate Cabinet Weight
|Approximate Brick Weight
|Approximate Air Handler
|Approximate Installed Weight
|Number of Elements
|Number of Bricks
|**Paired Indoor Coil Capacity
Front access dimensions
Inner dimensions (W x D x H in inches)
|1 ½ to 3 TON
20” x 20”
21″ x 21” x 22.5″
*The return and supply air plenums can be ordered as optional pieces with the 4200 series systems. They must be installed on the correct opening . Any ducting must accommodate the opening sizes at a minimum.
**Serenity can accommodate most heat pump or air conditioner indoor coils, provided the heat pump or air conditioner is sized in accordance to supply air delivery fates of the system. A return air plenum can be ordered as an optional accessory with Serenity. The dimensions listed are those that the optional return air plenum can accommodate. For larger coils, the return air plenum must be installer supplied. If using an air conditioner or heat pump system, that system must include the indoor coil or the outdoor compressor system as standard equipment.