/
/
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. RDDB 722-H400
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 Fall Season! SHOP NOW

Call: 800.239.5152
Hvac Parts
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

  • Bearings & Bushings(1)
  • Brackets & Retainers(6)
  • Burners(1)
  • Caps & Plugs(2)
  • Catches, Latches & Strikes(1)
  • Clamps & Clips(1)
  • Condenser & Evaporator Coils(3)
  • Contactors(6)
  • Controls(6)
  • Decals, Labels & Overlays(4)
  • Doors & Hardware(1)
  • Fan & Blower Motors(2)
  • Fan Blades & Blower Wheels(2)
  • Filters, Screens & Driers(6)
  • Fuses, Blocks & Holders(3)
  • Gaskets & Seals(4)
  • Hinges(1)
  • Holders & Supports(1)
  • Hoses, Pipes & Tubing(4)
  • Ignition Modules(1)
  • Ignitors & Electrodes(2)
  • Light Sockets & Lampholders(1)
  • Nuts, Bolts & Screws(14)
  • Orifices(1)
  • Panels, Covers & Lids(4)
  • Pans, Trays & Wells(2)
  • Power Supplies & Cords(1)
  • Probes & Sensors(5)
  • Pumps & Motors(6)
  • Relays(5)
  • Shields & Guards(2)
  • Switches & Buttons(11)
  • Terminal Blocks(2)
  • Thermostats & High Limits(2)
  • Timers(2)
  • Transformers(2)
  • Valves, Solenoids & Fittings(7)
  • Washers, Rings & Spacers(5)
  • Wires, Cables & Hardware(4)
Cool,Calm and Collected- Real OEM HVAC Pars Are in Season! SHOP NOW

Part Category

  • Bearings & Bushings(1)
  • Brackets & Retainers(6)
  • Burners(1)
  • Caps & Plugs(2)
  • Catches, Latches & Strikes(1)
  • Clamps & Clips(1)
  • Condenser & Evaporator Coils(3)
  • Contactors(6)
  • Controls(6)
  • Decals, Labels & Overlays(4)
  • Doors & Hardware(1)
  • Fan & Blower Motors(2)
  • Fan Blades & Blower Wheels(2)
  • Filters, Screens & Driers(6)
  • Fuses, Blocks & Holders(3)
  • Gaskets & Seals(4)
  • Hinges(1)
  • Holders & Supports(1)
  • Hoses, Pipes & Tubing(4)
  • Ignition Modules(1)
  • Ignitors & Electrodes(2)
  • Light Sockets & Lampholders(1)
  • Nuts, Bolts & Screws(14)
  • Orifices(1)
  • Panels, Covers & Lids(4)
  • Pans, Trays & Wells(2)
  • Power Supplies & Cords(1)
  • Probes & Sensors(5)
  • Pumps & Motors(6)
  • Relays(5)
  • Shields & Guards(2)
  • Switches & Buttons(11)
  • Terminal Blocks(2)
  • Thermostats & High Limits(2)
  • Timers(2)
  • Transformers(2)
  • Valves, Solenoids & Fittings(7)
  • Washers, Rings & Spacers(5)
  • Wires, Cables & Hardware(4)
Cool,Calm and Collected- Real OEM HVAC Pars Are in Season! SHOP NOW

Model: RDDB 722-H400

Manuals Available: 7

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

Service Manual

View Manual

Reznor RDDB 722-H400 Parts & Manuals

Manufacturer:

Model #:

Reznor

RDDB 722-H400

Packaged Makeup Air High Outside Air System (DOAS)

Packaged Makeup Air High Outside Air System (DOAS)

Reznor RZ082414 Energy Cutout Limit Control

Reznor
  • Mfr Part # RZ082414
  • Parts Town # REZRZ082414
  • Quantity5

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 148588 Hi Limit Switch, Auto Reset, 60" Capillary, 270F

Reznor
  • Mfr Part # 148588
  • Parts Town # REZ148588
  • Quantity3

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
  • Quantity2

In Stock

Reznor 1028 PIPE PLUG 1/8 IN. STD. BLACK

Reznor
  • Mfr Part # 1028
  • Parts Town # REZ1028
  • 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 1087 WASHERS 5/16 SAE FLAT

Reznor
  • Mfr Part # 1087
  • Parts Town # REZ1087
  • 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 114350 HHD TAP BOLT 3/8-16NCX1-1/2 #5

Reznor
  • Mfr Part # 114350
  • Parts Town # REZ114350
  • Quantity0

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

Reznor 116043 Static Pressure Tap, Venter/Flue Wrapper

Reznor
  • Mfr Part # 116043
  • Parts Town # REZ116043
  • Quantity0

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

Reznor 11813 SMS S/M 10 X 1/2 AB STALGD

Reznor
  • Mfr Part # 11813
  • Parts Town # REZ11813
  • Quantity0

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

Reznor 119625 CONTACTOR

Reznor
Call or email for price
  • Mfr Part # 119625
  • Parts Town # REZ119625
  • Quantity0

Out of Stock, backorders usually ship in 7-9 days.

To buy this OEM part, please call us at 800.239.5152.

Reznor 119626 120VCOIL 3POLE 25AMP CONTACTOR

Reznor
  • Mfr Part # 119626
  • Parts Town # REZ119626
  • Quantity0

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

Reznor 123606 LOCKING WIRE SADLE LWS-A-3-01

Reznor
  • Mfr Part # 123606
  • Parts Town # REZ123606
  • Quantity0

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

Reznor 1333 LOCKWASHER 5/16 IN.

Reznor
  • Mfr Part # 1333
  • Parts Town # REZ1333
  • Quantity0

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

Reznor 142296 20HP 230/460V BLOWER MOTOR

Reznor
  • Mfr Part # 142296
  • Parts Town # REZ142296
  • Quantity0

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

Reznor 1438 HEX NUT 3/8"

Reznor
  • Mfr Part # 1438
  • Parts Town # REZ1438
  • Quantity0

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

Reznor 151199 Overload Relay

Reznor
  • Mfr Part # 151199
  • Parts Town # REZ151199
  • Quantity0

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

Reznor 157107 Mounting Bracket, Fan Motor

Reznor
  • Mfr Part # 157107
  • Parts Town # REZ157107
  • Quantity0

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

Reznor 158800 Hinge, Door

Reznor
  • Mfr Part # 158800
  • Parts Town # REZ158800
  • Quantity0

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

Reznor 158802 SMS 10-32 X 1/2 PAN W/LKWASHER

Reznor
  • Mfr Part # 158802
  • Parts Town # REZ158802
  • Quantity0

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

123