# 3.9.6 Transformers

Transformer Type

Applicability

Buildings with large electric service

Definition

Transformers can be classified as either dry type or liquid filled (usually oil).

Units

List (see above)

Input Restrictions

Transformers can be modeled or not at the discretion of the energy modeler. If they are more efficient than the requirements in Standard 90.1-2016, then they must be modeled in order to take credit.

Baseline Rules

If transformers are modeled in the proposed design, then they must also be modeled in the baseline building.

Transformer Efficiency

Applicability

When transformers are modeled.

Definition

The efficiency expressed as a percent representing the

Units

Percent (%)

Input Restrictions

For new construction, transformers must meet the efficiency requirements in table 8.4.4 of Standard 90.1-2016.

Baseline Rules

Efficiency shall be taken from table 8.4.4. of Standard 90.1‑2016.