Unit heaters are designed for use in space heating applications.
Required Objects
The unit heater must have the following property.
- It must be attached to a conditioned zone.
Design Assumptions
| Property | Value | Notes |
|---|---|---|
| System air flow | Constant | |
| Heating supply air temperature | 40°C |
Heating Coil
The heating coil has the following assumptions.
- The electric resistence heating coil is 100% efficient.
- The furnace heating coil is 80% efficient.
- The hot water coil has the following properties.
| Property | Value | Notes |
|---|---|---|
| Coil leaving air temperature | 40°C | |
| Hot water design inlet temperature | N/A | Set by hot water loop. |
| Hot water design outlet temperature | N/A | Set by hot water loop. |
Supply Fan
The supply fan has the following properties.
| Property | Value | Notes |
|---|---|---|
| Pressure rise | 250 Pa | |
| Total efficiency | 70% | |
| Motor efficiency | 94% |