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Laars NeoTherm Modulating, Condensing Boilers


Everything a modern boiler should be
Natural Gas or Liquid Propane

FREE SHIPPING LOWER 48 to nearest commercial dock
*on boilers only, not accessories

NeoTherm is a direct vent, sealed combustion, condensing boiler boasting 95% efficiency that modulates with a 5 to 1 turndown. Zero clearance to combustibles and the convenient top connections (horizontal or vertical direct vent) make NeoTherm perfect for tight installations. Featuring an ASME stainless steel heat exchanger and NOx emissions lower than 10ppm, NeoTherm is easy to use and easy on the environment. Built standard with the new LAARS Integrated Control System, all controls are contained in one safe, simple, user-friendly device.

12 year limited warranty on residential models
10 year limited warranty on commercial models

Click here for prefabricated boiler panels compatible with the LAARS NeoTherm.

PDF Documents:
NeoTherm Installation Manual | Domestic Water with 3-way Valve | Domestic Water with Pump


2-3 week lead time on all Laars boiler orders.
When commissioning a boiler you will need an electrician and gas technician with combustion analyzer and/or manometer to properly set up your new appliance.

Unit Purchase Bulk Purchase
Part No. BTU Qty Unit Price Qty Bulk Price
↓   Natural Gas Boiler w/Factory Pump   ↓
NTH080NXN 80 NeoTherm 080-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$3745.69
NTH105NXN 105 NeoTherm 105-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$4098.94
NTH150NXN 150 NeoTherm 150-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$4571.44
NTH210NXN 210 NeoTherm 210-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$5148.56
NTH285N 285 NeoTherm 285-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$7317.00
NTH399NXN 399 NeoTherm 399-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$8878.59
NTH500NXN 500 NeoTherm 500-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$11122.48
↓   Propane Boiler w/Factory Pump   ↓
NTH080PXN 80 NeoTherm 080-Propane w/pump
FREE SHIPPING (*Continental US)
$3745.69
NTH105PXN 105 NeoTherm 105-Propane w/pump
FREE SHIPPING (*Continental US)
$4098.94
NTH150PXN 150 NeoTherm 150-Propane w/pump
FREE SHIPPING (*Continental US)
$4571.44
NTH210PXN 210 NeoTherm 210-Propane w/pump
FREE SHIPPING (*Continental US)
$5148.56
NTH285PXN 285 NeoTherm 285-Propane w/pump
FREE SHIPPING (*Continental US)
$7317.00
NTH399PXN 399 NeoTherm 399-Propane w/pump
FREE SHIPPING (*Continental US)
$8878.59
NTH500PXN 500 NeoTherm 500-Propane w/pump
FREE SHIPPING (*Continental US)
$11122.48
↓   Natural Gas Boiler without Pump   ↓
NTH399NXX 399 NeoTherm 399-Natural gas without pump
FREE SHIPPING (*Continental US)
$8758.32
NTH500NXX 500 NeoTherm 500-Natural gas without pump
FREE SHIPPING (*Continental US)
$10787.04
NTH500NJX 500 Natural Gas w/o pump, with CSD-1, FM, GAP, IL
FREE SHIPPING (*Continental US)
$11266.40
NTH600NXX 600 NeoTherm 600-Natural gas without pump
FREE SHIPPING (*Continental US)
$12042.56
NTH750NXX 750 NeoTherm 750-Natural gas without pump
FREE SHIPPING (*Continental US)
$13130.08
NTH850NXX 850 NeoTherm 850-Natural gas without pump
FREE SHIPPING (*Continental US)
$14189.60
↓   Propane Boiler without Pump   ↓
NTH399PXX 399 NeoTherm 399-Propane without pump
FREE SHIPPING (*Continental US)
$8758.32
NTH500PXX 500 NeoTherm 500-Propane without pump
FREE SHIPPING (*Continental US)
$10787.04
NTH600PXX 600 NeoTherm 600-Propane without pump
FREE SHIPPING (*Continental US)
$12042.56
NTH750PXX 750 NeoTherm 750-Propane without pump
FREE SHIPPING (*Continental US)
$13130.08
NTH850PXX 850 NeoTherm 850-Propane without pump
FREE SHIPPING (*Continental US)
$14189.60
↓  Natural Gas Modulating Condensing Water Heater w/Factory Pump   ↓
NTV150NXN 150 NeoTherm NTV 150-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$5583.75
NTV199NXN 199 NeoTherm NTV 199-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$6766.25
NTV285NXN 285 NeoTherm NTV 285-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$8424.68
NTV399NXN 399 NeoTherm NTV 399-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$10061.70
NTV500NXN 500 NeoTherm NTV 500-Natural Gas w/pump
FREE SHIPPING (*Continental US)
$12481.88
↓  Natural Gas Modulating Condensing Water Heater without Pump   ↓
NTV750NXX NeoTherm NTV 750-Natural Gas without pump $15043.80
NTV850NXX NeoTherm NTV 850-Natural Gas without pump $16308.80
↓  Propane Modulating Condensing Water Heater w/Factory Pump   ↓
NTV150PXN 150 NeoTherm NTV 150-Propane w/pump
FREE SHIPPING (*Continental US)
$5583.75
NTV199PXN 199 NeoTherm NTV 199-Propane w/pump
FREE SHIPPING (*Continental US)
$6766.25
NTV285PXN 285 NeoTherm NTV 285-Propane w/pump
FREE SHIPPING (*Continental US)
$8424.68
NTV399PXN 399 NeoTherm NTV 399-Propane w/pump
FREE SHIPPING (*Continental US)
$10061.70
NTV500PXN 500 NeoTherm NTV 500-Propane w/pump
FREE SHIPPING (*Continental US)
$12481.88
↓  NeoTherm Conversion Kits   ↓
CA006201 NeoTherm 080 propane conversion kit $51.00
CA006202 NeoTherm 105 propane conversion kit $51.00
CA006203 NeoTherm 150 propane conversion kit $51.00
CA006204 NeoTherm 210 propane conversion kit $51.00
↓  NeoTherm Parts   ↓
RA2113700 Combustion Blower for NeoTherm 80 or 105 $417.31
RA2107500 Combustion Blower for NeoTherm 150 $427.92
RA2114200 Combustion Blower for NeoTherm 210 or 285 $629.31
RA2114500 Combustion Blower for NeoTherm 399 $605.11
RA2113100 Combustion Blower for NeoTherm 500 $842.28
RA2108500 Combustion Blower for NeoTherm 600 $1308.51
RV2017900 Gas Valve Venturi for NeoTherm 80 $187.99
RV2017901 Gas Valve Venturi for NeoTherm 105 $187.21
RV2017902 Gas Valve Venturi for NeoTherm 150 $181.47
RV2017903 Gas Valve Venturi for NeoTherm 210 $176.95
RV2017904 Gas Valve Venturi for NeoTherm 285 $322.10
R2004000 High Gas Pressure Switch for NeoTherm 500 $113.33
R2004100 Low Gas Pressure Switch for NeoTherm 500 $120.32
R2069200 Flame Sensor w/gasket $47.18
RS2106900 Heat Exchanger for NeoTherm 80 $1756.75
RS2105500 Heat Exchanger for NeoTherm 105 $1970.18
RS2105800 Heat Exchanger for NeoTherm 150 $2277.74
RTXD7109 Control module for NeoTherm 150-285 Revision 2 $368.93
RA2112232 Pump for NeoTherm 80 $182.42
RA2112227 Pump for NeoTherm 105 or 150 $530.80
RA2112228 Pump for NeoTherm 210 $474.28
RA2112230 Pump for NeoTherm 285 $456.43
RA2112229 Pump for NeoTherm 500 $655.37
R0021901 Low Water Cutoff for NeoTherm 500 $338.66
RE2320600 Inlet Water Temperature Sensor for all NeoTherm boilers $44.70
RE2319900 Duplex Water Temperature Sensor for all NeoTherm boilers $46.67
RE2319700 Stack Temperature Sensor for all NeoTherm boilers $49.07
RE2108700 Transformer for all NeoTherm boilers $61.47
RS2109100 Gasket Set (burner, ignitor, sensor, door) for all NeoTherm boilers $41.04
R50D2021 Rear Refractory Tile $50.05
RT2109001 Front Refractory Tile $63.12
RXD7143 Control module for NeoTherm 150-285 Revision 3 Replaces RXD7109 $398.23
E2310600 DHW Tank Sensor $43.78
E2324300 On/Off Switch $33.34
RV2019200 Gas Valve/Venturi for Neotherm 399 $395.93
RPZF3 SSR Supplemental Switching Relay 250V 15A RPM
Includes RPZF3 & RPM32F7
$49.99
CA004801 Optional Flow Switch for NeoTherm 80-210 $150.75
CA010100 2" Flush-Mount Concentric Terminal $72.75
CA010101 3" Flush-Mount Concentric Terminal $72.75
CA010102 4" Flush-Mount Concentric Terminal $72.75
239-44069-02 2" concentric vent kit termination (bazooka-style) $81.00
239-44069-01 3" concentric vent kit termination (bazooka-style) $81.00
A2123601 1 Liter Neutralizing Cartridge w/media for NeoTherm 80-285 $100.50
A2123602 2 Liter Neutralizing Cartridge w/media for NeoTherm 399-850 $162.75
A2123605 2.5 lbs Neutralizing Media (A2123601 requires 1 kit, A2123602 requires 2 kits) $43.04
↓  Accessories   ↓
VBN3DN3P0X Honeywell 3-Way 1-1/4" FNPT Actuated Control Ball Valve with 34 Cv capacity. No pre-assembled actuator & no weather enclosure.
Order & use with Damper Actuator (below).
$246.13
MS4105A1030 Honeywell 2 Position Damper Actuator with Spring Return (44 lb-in).
Order & use with 3-Way Actuated Control Ball Valve (above).
HoneywellMS4105A1030-InstallationManual.pdf
$212.29
↓   Heat Transfer Paste   ↓
HTPaste Heat Transfer Paste, 1 oz., Temp range -65°F to 400°F, Flashpoint 500°F, Dropping point, 500°F, Specific gravity 2.35 $6.71 $31.48
(5 x $6.30)

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