/
/
Parts town. Get real parts faster

Shopping Cart

Skip to NavigationSkip to Content
Loading...
Loading...
CAD
Multi-SKU Order
LoginRegister
Parts town. Get real parts faster

Find Equipment Manuals

Loading...
Loading...
  1. Home
  2. /
  3. Reznor
  4. /
  5. SDH 300
Parts Town Logo

1-Hour Pickup Available

get special offers & news from parts town

800.239.5152
Loading...
Loading...
visa
visa
mastercard
mastercard
american-express
american-express
discover
discover
paypal
paypal
© 2026 Parts Town. All rights reserved.
Loading...
visa
visa
mastercard
mastercard
american-express
american-express
discover
discover
paypal
paypal

Stock Up on Real OEM HVAC Parts for the Summer Season! SHOP NOW

Call: 800.239.5152
Hvac Parts
TECHTOWN
Track My Order

Important Update: Click here for the latest information on tariffs and their impact on our industry.

Help Desk

  • Contact Us
  • Shipping
  • Taxes And Fees
  • Returns
  • FAQ

Inside Parts Town

  • About Us
  • Careers
  • Our Difference
  • Resource Center
  • Parts Town Blog
  • techtown
  • International

Technology and Innovations

  • Parts Town App
  • Serial Number Lookup
  • Smart Manuals
  • Website Features
  • Terms of Use
  • Privacy Policy
  • Privacy Request

Part Category

  • Actuators(1)
  • Bearings & Bushings(3)
  • Belts, Pulleys & Sheaves(12)
  • Brackets & Retainers(5)
  • Burners(2)
  • Capacitors(2)
  • Caps & Plugs(9)
  • Clamps & Clips(2)
  • Compressors(1)
  • Condenser & Evaporator Coils(1)
  • Contactors(3)
  • Controls(9)
  • Decals, Labels & Overlays(11)
  • Disconnects, Couplings & Collars(4)
  • Doors & Hardware(3)
  • Drain Parts(2)
  • Elements, Heaters & Platens(3)
  • Fan & Blower Motors(9)
  • Fan Blades & Blower Wheels(1)
  • Filters, Screens & Driers(22)
  • Fuses, Blocks & Holders(6)
  • Gaskets & Seals(14)
  • Handles(1)
  • Hinges(1)
  • Holders & Supports(8)
  • Hoses, Pipes & Tubing(13)
  • Ignition Modules(1)
  • Ignitors & Electrodes(2)
  • Light Sockets & Lampholders(1)
  • Nuts, Bolts & Screws(14)
  • Orifices(3)
  • Panels, Covers & Lids(9)
  • Pans, Trays & Wells(1)
  • Plates(1)
  • Probes & Sensors(8)
  • Pumps & Motors(13)
  • Relays(18)
  • Shelves & Racks(1)
  • Shields & Guards(8)
  • Springs(2)
  • Switches & Buttons(21)
  • Terminal Blocks(3)
  • Thermostats & High Limits(5)
  • Transformers(4)
  • Valves, Solenoids & Fittings(17)
  • Variable Frequency Drives (VFD)(1)
  • Washers, Rings & Spacers(5)
  • Wires, Cables & Hardware(4)
Cool,Calm and Collected- Real OEM HVAC Pars Are in Season! SHOP NOW

Part Category

  • Actuators(1)
  • Bearings & Bushings(3)
  • Belts, Pulleys & Sheaves(12)
  • Brackets & Retainers(5)
  • Burners(2)
  • Capacitors(2)
  • Caps & Plugs(9)
  • Clamps & Clips(2)
  • Compressors(1)
  • Condenser & Evaporator Coils(1)
  • Contactors(3)
  • Controls(9)
  • Decals, Labels & Overlays(11)
  • Disconnects, Couplings & Collars(4)
  • Doors & Hardware(3)
  • Drain Parts(2)
  • Elements, Heaters & Platens(3)
  • Fan & Blower Motors(9)
  • Fan Blades & Blower Wheels(1)
  • Filters, Screens & Driers(22)
  • Fuses, Blocks & Holders(6)
  • Gaskets & Seals(14)
  • Handles(1)
  • Hinges(1)
  • Holders & Supports(8)
  • Hoses, Pipes & Tubing(13)
  • Ignition Modules(1)
  • Ignitors & Electrodes(2)
  • Light Sockets & Lampholders(1)
  • Nuts, Bolts & Screws(14)
  • Orifices(3)
  • Panels, Covers & Lids(9)
  • Pans, Trays & Wells(1)
  • Plates(1)
  • Probes & Sensors(8)
  • Pumps & Motors(13)
  • Relays(18)
  • Shelves & Racks(1)
  • Shields & Guards(8)
  • Springs(2)
  • Switches & Buttons(21)
  • Terminal Blocks(3)
  • Thermostats & High Limits(5)
  • Transformers(4)
  • Valves, Solenoids & Fittings(17)
  • Variable Frequency Drives (VFD)(1)
  • Washers, Rings & Spacers(5)
  • Wires, Cables & Hardware(4)
Cool,Calm and Collected- Real OEM HVAC Pars Are in Season! SHOP NOW

Model: SDH 300

Manuals Available: 6

Installation & Operation Manual

View Manual

Installation & Operation Manual

View Manual

Installation & Operation Manual

View Manual

Installation & Operation Manual

View Manual

Parts Manual

View Manual

Service Manual

View Manual

Reznor SDH 300 Parts & Manuals

Manufacturer:

Model #:

Reznor

SDH 300

Air Handler

Air Handler

Reznor 36951 Motor, Blower, 200-230/460 Volt, 3/4HP, 3 PH, 1725 RPM

Reznor
  • Mfr Part # 36951
  • Parts Town # REZ36951
  • Quantity2

In Stock

Reznor RZ214979 Ignition Control Board, DSI

Reznor
  • Mfr Part # RZ214979
  • Parts Town # REZRZ214979
  • Quantity2

In Stock

Reznor 110656 Relay, 125 Volt, 15 Amp, SPDT

Reznor
  • Mfr Part # 110656
  • Parts Town # REZ110656
  • Quantity1

In Stock

Reznor 144972 Terminal Block, 3 Pole

Reznor
  • Mfr Part # 144972
  • Parts Town # REZ144972
  • Quantity5

In Stock

Reznor 144973 Mount, KAD Terminal Block

Reznor
  • Mfr Part # 144973
  • Parts Town # REZ144973
  • Quantity6

In Stock

Reznor 216386 Contactor, 3 Pole, 24VAC 50/60HZ Coil, 25 FLA

Reznor
  • Mfr Part # 216386
  • Parts Town # REZ216386
  • Quantity4

In Stock

Reznor 214979 Ignition Control Board

Reznor
  • Mfr Part # 214979
  • Parts Town # REZ214979
  • Quantity2

In Stock

Reznor 195668 Gasket/Insulation, Burner

Reznor
  • Mfr Part # 195668
  • Parts Town # REZ195668
  • Quantity2

In Stock

Reznor 209339 Spark Electrode, 31-/2"

Reznor
  • Mfr Part # 209339
  • Parts Town # REZ209339
  • Quantity4

In Stock

Reznor 104104 FILTER 16 X 16 X 1 PLEATED

Reznor
  • Mfr Part # 104104
  • Parts Town # REZ104104
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 104105 FILTER 16 X 20 X 1 PLEATED

Reznor
  • Mfr Part # 104105
  • Parts Town # REZ104105
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 105648 2SPD 3HP MOTOR

Reznor
  • Mfr Part # 105648
  • Parts Town # REZ105648
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 106748 Pulley/Sheave, Motor, 7/8" Bore

Reznor
  • Mfr Part # 106748
  • Parts Town # REZ106748
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 10756 OBSERVATION HOLE COVERS

Reznor
  • Mfr Part # 10756
  • Parts Town # REZ10756
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111096 HOLE PLUG #DP625 BLACK #2663

Reznor
  • Mfr Part # 111096
  • Parts Town # REZ111096
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111387 DIN RAIL

Reznor
  • Mfr Part # 111387
  • Parts Town # REZ111387
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111560 Motor, Blower, 208-230 Volt, 1 PH, 3 HP, 3450 RPM

Reznor
  • Mfr Part # 111560
  • Parts Town # REZ111560
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111731 SENSING TUBE MOUNTING PLATE

Reznor
  • Mfr Part # 111731
  • Parts Town # REZ111731
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 111733 SENSING TUBE ASSEMBLY BW1

Reznor
  • Mfr Part # 111733
  • Parts Town # REZ111733
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 113371 Motor, 460/208-230V, 60/50HZ, 3PH, 3450/2850RPM, 5HP

Reznor
  • Mfr Part # 113371
  • Parts Town # REZ113371
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 114334 12" X 16" X 1"PERMANENT FILTER

Reznor
  • Mfr Part # 114334
  • Parts Town # REZ114334
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 114979 MOTOR STARTER

Reznor
  • Mfr Part # 114979
  • Parts Town # REZ114979
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 115849 Temperature Stage Module, Add-On, 1-30F

Reznor
  • Mfr Part # 115849
  • Parts Town # REZ115849
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

Reznor 115850 Duct Sensor Element Holder

Reznor
  • Mfr Part # 115850
  • Parts Town # REZ115850
  • Quantity0

Out of stock, but not out of mind! Place your order now and we'll get it to you ASAP.

123