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Independent equipment referenceUnited States / 01

Know the
model.

Heating & cooling equipment.
The numbers, the matches,
and the records behind them.

Explore the index
Equipment study — 001
01 / FAN ASSEMBLY02 / COIL03 / CABINETISOMETRIC STUDY
Air-source heat pump
Outdoor assemblyIllustration
Not to scale
Start with a modelFind the exact record.
Try 4TWL, Carrier or BoschView all equipment
18,825Equipment models
341Brands in the index
276,573Heat pump combinations
The source record matters.EPA ENERGY STAR data
Checked Sep 21, 2026
01 — THE INDEX

Find your
equipment.

Five categories. Original model numbers. A clear route to the specifications.

Open the full catalog
02 — MODEL REFERENCES

A closer look.

One model can belong to several rated systems.
Open a record to see what goes together.

Browse all models
FIELD NOTE / 001

The match
makes the rating.

A model number is only the beginning. Change an indoor unit or a furnace and the rated performance can change with it.

Read the field note
Reading a listed system
01Outdoor unitExact model
02Indoor unitListed match
ONE SOURCE RECORDOne rated configuration.

Additional furnace components, where required, stay with the record. Unlisted indoor matches remain explicitly unknown.

03 — MANUFACTURER DIRECTORY

Start with a name.

All 341 brands
Bosch211 models Carrier474 models Daikin132 models Lennox391 models Mitsubishi Electric245 models Trane151 models
REFERENCE / 01

Read the numbers.

SEER2, HSPF2, AFUE, COP. What they measure, and which numbers belong in the same comparison.

REFERENCE / 02

Follow the evidence.

Original sources, verification dates and a clear account of what the data can — and cannot — tell you.