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 streamline your ordering process, you’ll find everything you need to navigate our product lineup with ease.

HH Series

HBC Series

HYB Series

E-Select Nomenclature

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
Brand	A–AE Air	AE Air is the commercial division of First Co. and specializes in Chilled Water units and Water Source Heat Pumps.
Coil Configuration	3 – 2 Pipe 3 Row (Spec Document) 4 – 2 Pipe 4 Row (Spec Document) 30 – 2 Pipe 3 Row 31 – 4 Pipe 3 Row Cooling, 1 Row HW 32 – 4 Pipe 3 Row Cooling, 2 Row HW 33 – 4 Pipe 3 Row, 3 Row 41 – 4 Pipe 4 Row Cooling, 1 Row HW 42 – 4 Pipe 4 Row, 2 Row 43 – 4 Pipe 4 Row, 3 Row 60 – 2 Pipe, 6 Row	A 2 – pipe system has one pipe for hot water supply and one for return, and can provide heating or cooling at any given time depending on the water source. A 4 – pipe system has two separate pipes for hot water and two for chilled water allowing for simultaneo us heating and cooling in different zones of a building. Multiple rows of tubes increase the coil’s surface area allowing it to transfer more heat to the air passing over the coil.
Coil Connection Side	L or LH – Left Hand R or RH – Right Hand	The hot water supply should be connected to the bottom connection of the coil on one side. Please select which side of the unit you prefer the coil connection.
Controls	A – Line Voltage B – 24V 3 Speed D – 24V 3 Speed w/Toggle Switch G – 24V ( 0 – 10V) J – 24V (0 – 10V) w/Toggle Switch	Three-speed controls allow for three specific fan speeds – low, medium and high. A toggle switch has a lever or tab that can be flipped between “on” and “off” positions, allowing for simple manual control.
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	E-KW Heat	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.
Motor Type	P–PSC E or X–ECM	Permanent Split Capacitor motors run at a fixed speed and operate at full power regardless of the demand for heating or cooling. Electronically Commutated Motors are a type of variable speed motor with built – in inverters and microprocessors that adjust speed based on demand.
Series	EHBC, PHBC, CHBC, RHBC EHH, PHH, CHH, RHH HYB, PHYB	Name of product family or model name
Static Pressure	0–Standard to High Static S–Low Static Model	Static pressure is the amount of pressure required to overcome static created by external objects such as ductwork, grilles, etc. The Low Static Model is designed for ductless applications.
Unit Configuration	0–Open Blower P–Return Air Plenum R–Recessed, Telescoping Panel C–Cabinet Exposed	Ceiling Fan Coils can be configured to accommodate placement in the installation point. See specification document for physical dimensions and renders of each option.
Unit Size	CFM	An air-conditioner’s unit size or nominal capacity is the output level it can handle when functioning in either cooling or heating mode. Cubic feet per minute (CFM) measures how much airflow volume passes through a space in a minute.
Voltage	120 / 1Ph / 60Hz 208 / 1Ph / 60Hz 230 / 1Ph / 60Hz 277 / 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
Filter Frame	0–None 1–1” Frame	If you select a 1” filter type, you may need a 1” filter frame to hold the filter.
Filter Type	0–None A–1” Std Temporary	Temporary / disposable and permanent filters are available in a variety of thicknesses and MERV ratings. A one – inch disposable filter is the standard filter type when optional.
Insulation	0–Std Fiberglass C–Closed Cell Foam F–Foil Faced Insulation	General Insulation is available in a variety of types and can be selected based on specific product or environmental needs. Closed Cell Foam insulation is made from a dense foam of tightly packed “closed cells” which provides high thermal resistance. Foil – Face Insulation has a reflective foil layer attached to one or both sides which reflects radiant heat, reducing heat transfer.