# 3.8.7 Heat Recovery Equipment

Applicability Heat Recovery Name All heat recovery systems A name assigned to a heat recovery system. This would provide a link to the construction documents. Text, unique As designed No heat recovery systems
Applicability Heat Recovery Device Type All heat recovery systems The type of heat recovery equipment. Choices include: Double-Bundled Chiller Generator Engine-Driven Chiller Air Conditioning Unit Refrigerated Casework List (see above) As designed Heat recovery systems are not included in the baseline system.
Applicability Heat Recovery Loads All heat recovery systems The loads met by the heat recovery system. Choices include: Service water heating Space heating Process heating More than one load may be selected. List (see above) As designed Not required in the baseline system.
90.1-2016 BM

Heat Recovery Name

Applicability

All heat recovery systems

Definition

A name assigned to a heat recovery system. This would provide a link to the construction documents.

Units

Text, unique

Input Restrictions

As designed

Baseline Rules

No heat recovery systems

Heat Recovery Device Type

Applicability

All heat recovery systems

Definition

The type of heat recovery equipment. Choices include:

• Double-Bundled Chiller
• Generator
• Engine-Driven Chiller
• Air Conditioning Unit
• Refrigerated Casework

Units

List (see above)

Input Restrictions

As designed

Baseline Rules

The baseline building is modeled with a condenser heat recovery system for service water heating, when all of the following conditions are true:

• The building operates 24 hours per day.
• The total installed heat rejection capacity of the water cooled system exceeds 6,000,000 Btu/h.
• The design service hot water load is greater than 1,000,000 Btu/h.

The required heat recovery system for the baseline building, shall have the capacity to provide the smaller of:

• 60% of the peak heat rejection load at design conditions, or
• Preheat of the peak service hot water draw to 85°F

If the simulation software is not capable of modeling the requirements described, the requirement for providing such a system in the proposed building shall be met as a prescriptive requirement and heat recovery shall not be modeled in the baseline or proposed building designs.

Applicability

All heat recovery systems

Definition

The loads met by the heat recovery system. Choices include:

• Service water heating
• Space heating
• Process heating

More than one load may be selected.

Units

List (see above)

Input Restrictions

As designed

Baseline Rules

Service water heating when required as described above

Condenser Heat Recovery Effectiveness

Applicability

Systems that use recover heat from a condenser

Definition

The percentage of heat rejection at design conditions from a DX or heat pump unit in cooling mode that is available for space or water heating

Units

Percent (%)

Input Restrictions

As designed. The software must indicate that supporting documentation is required on the output forms if heat recovery is specified.

Baseline Rules

Same as the proposed

Condenser Heat Recovery Use

Applicability

Systems that use heat recovery

Definition

The end use of the heat recovered from a DX or heat pump unit. The choices are:

• Reheat coils
• Water heating

Units

List (see above)

Input Restrictions

As designed. The software must indicate that supporting documentation is required on the output forms if heat recovery is specified.

Baseline Rules

Not applicable for most conditions. The end use will be water heating if required for 24-hour facility operation.

Building EQ
Applicability Heat Recovery Name All heat recovery systems A name assigned to a heat recovery system. This would provide a link to the construction documents. Text, unique As designed
Applicability Heat Recovery Device Type All heat recovery systems The type of heat recovery equipment. Choices include: Double-Bundled Chiller Generator Engine-Driven Chiller Air Conditioning Unit Refrigerated Casework List (see above) As designed
Applicability Heat Recovery Loads All heat recovery systems The loads met by the heat recovery system. Choices include: Service water heating Space heating Process heating More than one load may be selected. List (see above) As designed
Energy Star
Applicability Heat Recovery Name All heat recovery systems A name assigned to a heat recovery system. This would provide a link to the construction documents. Text, unique As designed
Applicability Heat Recovery Device Type All heat recovery systems The type of heat recovery equipment. Choices include: Double-Bundled Chiller Generator Engine-Driven Chiller Air Conditioning Unit Refrigerated Casework List (see above) As designed
Applicability Heat Recovery Loads All heat recovery systems The loads met by the heat recovery system. Choices include: Service water heating Space heating Process heating More than one load may be selected. List (see above) As designed