See your installation manual for direction on how to find the week and year of manufacture from the unit serial number.

Visit our Where-to-Buy page here.

Obtain model and serial numbers and refer to warranty policy on the back cover of the installation manual

Visit our Warranty Registration page here.

Visit our Unit Heater Sizing page here.

All service and installation of Modine products must be performed by a qualified service agency. To find a Modine Authorized Contractor, visit our Find an Authorized Contractor page here.

Buena Vista, VA; West Kingston, RI

Modine has tested and certified the operation of its gas-fired unit heaters with the caps that are specified in the installation and service manuals and offered in the price sheet. Other caps may be used if local codes allow, but Modine cannot be held responsible for resultant issues with burner operation.

We do not have AHRI certification for gas fired unit heaters

Installation must conform with local building codes or in the absence of local codes, with the National Fuel Gas Code ANSI Z223.1 (NFPA 54) – latest edition.

In Canada, installation must be in accordance with CSA B149.1

Make-up air systems, dedicated outdoor air systems, unit ventilators, and ductless mini-split cassettes that are ordered with the Modine Controls System can use accessory cards that communicate with a BMS. Certain gas unit heater models may also include an additional control board that can communicate.

Installation & Service Manuals Oil-Fired Unit Heater Installation & Service Manual, Model POR
Gas-fired Duct Furnace Installation & Service Manual, Model DJE
Weatherproof Gas-Fired Duct Furnace Installation & Service Manual, Model WDG/WDP
Gas-Fired Duct Furnace/Make-up Air Units Installation & Service Manual, Model DHE
Air Duct Smoke Detector Installation & Submittal, Models D, H, M, I, O & Q
Gas-Fired Unit Heaters Installation & Service Manual, Model PA/BA
Gas-Fired Unit Heaters Installation & Service Manual, Model PAE/BAE
Gas-Fired Unit Heaters Installation & Service Manual, Model PD/BD
Gas-Fired Unit Heaters Installation & Service Manual, Model PSH/BSH
Gas-Fired Unit Heaters Installation & Service Manual, Model PV/BV
Gas-Fired Unit Heaters Installation & Service Manual, Model HD
9" to 10" Vent Transition Gas-Fired Unit Heaters Selection & Installation Instructions, models PD/BD
Gas-Fired Unit Heaters Installation & Service Manual, Model HDS
High-Intensity Gas-Fired Infrared Heaters Installation & Service Manual, Model MT
Low-Intensity Gas-Fired Vacuum Infrared Heater Installation & Service Manual, Model MV
Low-Intensity Gas-Fired Pressurized Infrared Heater Installation & Service Manual, Model LM/HM
Low-Intensity Infrared Heaters Installation & Service Manual, Model TLP
Conversion from Natural Gas to Propane Gas & High Altitude Operation Selection & Installation Instructions, Model MT & RT
Modine Direct Fired Make-up Air Unit, Model MDB/MRB
Dedicatied Outdoor Air System


WIRING DIAGRAMS Indoor Duct Furnace/Make-up Air Wiring Diagrams Models, DJE/DHE
Gas-Fired Unit Heaters Wiring Diagrams, Models PA, BA August 1974
Gas-Fired Unit Heaters Wiring Diagrams A, Models PA, BA Manufactured after 1/1/1977 & before 9/1984
Gas-Fired Unit Heaters Wiring Diagrams B, Models PA, BA
Gas-Fired Unit Heaters Wiring Diagrams C, Models PA, BA
Gas-Fired Unit Heaters Wiring Diagrams, Model VG
Gas-Fired Unit Heaters Wiring Diagrams, Models PV/BV
Gas-Fired Unit Heaters Wiring Diagrams, Models PA/BA Manufactured after August 1984
Gas-Fired Unit Heaters Wiring Diagrams, Models PAE/BAE Manufactured after March 1991
Gas-Fired Unit Heaters Wiring Diagrams, Models PAE/BAE Manufactured after September, 1993
Gas-Fired Unit Heaters Wiring Diagrams, Model PD/BD
Gas-Fired Unit Heaters Wiring Diagrams, Models PAH/BAH Manufactured before November 1987
Gas-Fired Unit Heaters Wiring Diagrams, Models PAH/BAH & PSH/BSH Manufactured after October 1987
Gas-Fired Unit Heaters Wiring Diagrams, Models PSH/BSH
Gas-Fired Unit Heaters "Flora-Guard" Wiring Diagrams

OTHER Specifications Gas-fired Weatherproof Duct Furnace/Make-up Air
Heat Exchanger Replacement Gas-Fired Duct Furnace, Models DG, DJ & DJE
Heat Exchanger Replacement Weatherproof Duct Furnace/Make-up Air Units
Vent Cap Installation & Submittal Data Weatherproof Duct Furnace/Make-up Air Unit
Gas-Fired Unit Heaters Catalog, Models PSH & BSH
MCP-15-525 Controls System Manual

Spring Maintenance Suggestions
Fall Maintenance Checklist
Hot Dawg Trouble shooting Guide