Nomenclature Guide

This page is your go-to resource for understanding the model numbers and codes used in our products. Whether you’re looking to decode specifications or learn more about the industry, you’ll find everything you need to navigate our product lineup with ease.

A2L Transition Video

Cool-Pak - Aqua-Pak - Fresh-Pak

AC - HP - Gas 80% - Gas 95%

NOTE:

Not all descriptors may appear for each model. See individual product specification documents for complete model number configuration options

Glossary

Section	Digit Codes	Description
Accessory Connections	0-Standard	Accessories include Thermostat, Timers, Humidistat and Motorized Dampers
Brand	F–First Co	First Co. is a leading manufacturer of multi – occupant and commercial industry HVAC products.
Drain Pan	G–Standard Galvanized Steel S–Stainless Steel	Galvanized Steel Drain Pans are a cost-effective option with moderate corrosion resistance. Stainless Steel Drain Pans offer superior durability and corrosion resistance.
Heat Option	KW Heat Q–Standard Pump R–Hi-flow Pump W–Hot Water Coil HW–Without Pump	A higher kW in HVAC indicates more capacity for heating or cooling, but it must be matched with the specific requirements of the space and considered alongside efficiency ratings to ensure optimal performance and energy consumption. Water pumps and hot water coils are also available.
Heat Type	W–Hot Water Coil E–Electric Heat E1-Single Stage Elec Heat N8–Natural Gas 80+% Efficiency N9–Natural Gas 95+% Efficiency	Select the method of heat you prefer for the unit.
Series	BTUHs	Air conditioners and heat pumps remove heat from the air inside a building and move it outside. HVAC Unit Size or capacity is measured in tons or BTUHs (British Thermal Units per Hour). This metric determines how much heat a unit can remove from a room within an hour. A one-ton unit can remove 12,000 BTUH.
Unit Type	C–Cooling H–Heat Pump(w/Elec Heat) P–Heat Pump w/ERV E–Electric Heat(w/Cooling Only) G–Gas Heat(w/Cooling Only)	Select the type of heating or cooling unit you prefer. See individual product documents for product – specific selections.
Voltage	120 / 1Ph 60Hz 208-230 / 1Ph / 60Hz	Voltage is the electrical pressure that pushes an electric current through a circuit. Higher voltage indicates a more powerful pressure. Most HVAC systems use with 115 (120)V or 230V depending on size and capacity.
OPTIONS
Cabinet / Insulation	A0–20×20 w/Fiberglass B0–20×26 w/Fiberglass CF–20×26 Foil Face	Fiberglass is the standard form of insulation. Foil – Face Insulation has a reflective foil layer attached to one or both sides which reflects radiant heat, reducing heat transfer.
Controls	0–Standard T–Time Delay B–Standard Pump Control	The Standard Relay controls the operation of the blower fan, turning it on and off per the system’s call. A Time Delay Control will control the unit’s operation based on a set schedule. Standard Pump Control controls the temperature in the air stream utilizing hot water.