SR18TWLP

Empire 18" Hydraulic Thermostat, White 18,000 Btu, Vent-Free Infrared Heater

Name: Empire 18" Hydraulic Thermostat, White 18,000 Btu, Vent-Free Infrared Heater
Brand: Empire Comfort Systems
SKU: SR18TWLP
Price: 835.0 USD
Availability: InStock

★★★★★ (0)

$835.00 USD

Size: 18" (Thermostat)

12" (6,000 BTU)12" (10,000 BTU / Manual)12" (10,000 BTU / Thermostat)18" (Manual)18" (Thermostat)24" (Manual)24" (Thermostat)

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Recommended

Blower & Fan — optional

Mounting & Install

Empire Stand for floor Vent-Free Infrared/BlueFlame Heater AccessoriesSRS18W +$95.00

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The Empire 18" Hydraulic Thermostat, White 18,000 Btu, Vent-Free Infrared Heater is Empire's 18 in white vent-free infrared (radiant) room heater: 18,000 BTU per hour on natural gas or propane (chosen when you order - the heater is built for one gas and is never converted), hydraulic thermostat that cycles the burner on at the full 18,000 BTU per hour and off again, a standing pilot you light with the piezo button, and an Oxygen Depletion Sensor pilot. Nothing in it needs electricity, so it heats through a power outage and, being vent-free, keeps 99.9 percent of the fuel's heat in the room. The ceramic plaques glow red-orange and radiate heat straight to you and the objects in the room, the way sunlight warms through a window.

Two variants in one listing: SR18TWNAT for natural gas and SR18TWLP for propane - the manual's SR-18TW-1. It hangs on the wall from four mounting screws or rests on the optional SRS18W floor stand, takes the SRB18TW automatic blower (the brochure also lists the SRB18W manual blower for this size), and is design-certified to ANSI Z21.11.2 by CSA as an unvented room heater. Rated over 10,000 BTU, it is not a bedroom or bathroom heater. Supplemental heat for a room, never the primary heat for a house.

This listing is part of the Empire Vent-Free Infrared Heater family - use the selector above to compare the sizes and control options.

Key Features

18,000 BTU vent-free radiant heat: natural gas (SR18TWNAT) or propane (SR18TWLP), fixed at purchase; the hydraulic thermostat cycles the burner on at full input and off when the room is satisfied; it does not modulate.
Runs without electricity: standing pilot, piezo pushbutton igniter and a gas control that needs no power or batteries - heat through an outage, 99.9 percent of the fuel's heat kept in the room.
Oxygen Depletion Sensor pilot: the pilot light safety system shuts the heater off when the room runs short of fresh air; the heater is relit only after fresh air is provided.
Thermostat you set once: LO to HI covers roughly 55 F to 90 F at the thermostat bulb at the bottom of the casing (not the room temperature); turn the knob to PILOT when no heat is wanted, since at LO the burner still lights when the bulb drops to 55 F.
Wall or floor: four wall-mounting screws (and plastic anchors for sheet rock) come in the hardware package; the SRS18W floor stand is the optional way to put it on the floor.
Blower-ready: The SRB18TW automatic blower (the brochure also lists the SRB18W manual blower for this size) fits behind the top louver and plugs into a grounded three-prong receptacle; the heater itself keeps running without it.
Warranty: Empire's limited lifetime parts warranty with five-year labor on the combustion chamber and heat exchanger, five-year parts and labor on all other components (except thermostats) and one-year parts on thermostats, accessories and parts - original purchaser, qualified installer, proof of purchase.
Qualified installer: installation, gas piping and service by a qualified agency to the National Fuel Gas Code ANSI Z223.1 / NFPA 54 and local codes (Massachusetts: a licensed plumber or gas fitter, a flexible connector no longer than three feet, and unvented heaters are prohibited in bedrooms and bathrooms).

Specifications

Nominal Size	18"
Models	SR18TWNAT (natural gas) / SR18TWLP (propane) - SR-18TW-1 in the manual
Heater Type	Vent-free infrared (radiant) ceramic plaque wall heater, supplemental heat
Input	18,000 BTU/h
Fuel	Natural gas or propane as ordered - not field-convertible
Control	Hydraulic thermostat (cycles on / off at full input)
Ignition	Standing pilot, piezo pushbutton igniter, ODS safety pilot - no electricity
Dimensions	18 in W x 22 in H x 6 1/2 in D
Gas Inlet	3/8 in NPT, in the bottom of the heater
Gas Pressure	Natural gas inlet 7.0 to 10.5 in w.c. (manifold about 6.0 in w.c.); propane inlet 11.0 to 13.0 in w.c. (manifold about 10.0 in w.c.)
Clearance to Combustibles	6 in each side; 0 in rear; 36 in to the ceiling; 36 in below a shelf or sill; 2 in above the floor; never in an alcove or closet
Venting	None - vent-free (unvented room heater); an unconfined space of at least 900 cu ft (50 cu ft per 1,000 BTU/h of all appliances in it) or combustion air per the National Fuel Gas Code
Electrical	None to run the heater; the optional blower plugs into a properly grounded three-prong receptacle
Mounting	Wall, on four mounting screws; or the optional SRS18W floor stand
Accessories	SRB18TW blower (manual); brochure also lists the SRB18W; SRS18W floor stand
Shipping Weight (brochure)	27 lb
Certification	ANSI Z21.11.2-2019 unvented room heater, CSA; mobile-home approved; not for bedrooms or bathrooms (over 10,000 BTU/h)
Warranty	Limited lifetime parts + 5-year labor (combustion chamber, heat exchanger); 5-year parts and labor (other components, except thermostats); 1-year parts (thermostats, accessories, parts)

What's Included

Heater with its standing pilot, piezo igniter and gas control
Hardware package: four #10 x 1 in mounting screws and four plastic expansion anchors
Installation instructions and owner's manual, warranty card
Not included: the SRS18W floor stand (sold with its own four screws), the SRB18TW blower

Installation & Planning

Where it may go: a wall or floor-stand position in a room of at least 900 cu ft; rated over 10,000 BTU per hour it is never installed in a bedroom or bathroom; Massachusetts prohibits unvented heaters in bedrooms and bathrooms; out of traffic and away from furniture and draperies; not in an alcove or closet; permitted in an aftermarket manufactured (mobile) home where codes allow.
Clearances: 6 in to each side wall, 0 in to the rear wall, 36 in to the ceiling, 36 in below any shelf or window sill, 2 in from the bottom of the heater to carpeting or tile, plus clearance around the air openings and for service.
Combustion and ventilation air: an unvented heater draws its air from the room: at least 50 cu ft of room volume per 1,000 BTU per hour of every appliance in it (900 cu ft for this heater alone), or two combustion-air openings sized per the National Fuel Gas Code; buildings of unusually tight construction need additional fresh air; expect about 1 oz of water vapor per 1,000 BTU of input per hour.
Mounting: on a solid wall drive the four #10 x 1 in screws, leave a 1/8 in gap under the heads and hang the heater on them; on sheet rock drill four 5/16 in holes for the plastic expansion anchors; the lower louver, reflector and upper louver come off (two screws each) and go back with the louver lip behind and the reflector lip in front of the heat shield; the SRS18W floor stand attaches to the bottom of the heater with its four screws.
Gas: 3/8 in NPT inlet in the bottom of the heater; its own manual shut-off, union, drip-line sediment trap and a 1/8 in NPT test tapping upstream; natural gas 7.0 to 10.5 in w.c. or propane 11.0 to 13.0 in w.c. inlet pressure; 1/2 in pipe for runs to 100 ft on natural gas (3/8 in propane to 10 ft); never plastic pipe or well-head gas.
Altitude: above 2,000 ft reduce the rating 4 percent per 1,000 ft; the manufacturer or gas company rules on orifice changes.
Blower: The SRB18TW automatic blower (the brochure also lists the SRB18W manual blower for this size): the heater comes off the wall (or stays on its floor stand) while the blower housing is fastened to the top heat shield with four screws and the cord set is led through the casing back; three-prong grounding plug into a properly grounded receptacle; unplugging the blower does not stop the heater.
Lighting and care: knob to OFF, wait 10 minutes, knob to PILOT, push in and press the piezo button until the pilot lights, hold about one minute, then counterclockwise to HI and set the thermostat; the gas control's interlock allows a relight about 60 seconds after a shut-off. Annual inspection and cleaning by the dealer before the heating season; no fans blowing at the heater, no scented candles or air fresheners while it runs.
Documents: the Empire installation instructions and owner's manual 39909-3-1124 (11/2024, the family manual that lists SR-18TW-1) and the Empire Heating Systems infrared and blue flame heaters brochure EHS-01032 are attached in the Documents tab.
Dealer service: warranty claims go through the installing dealer with the model number, serial number, type of gas and purchase verification; the dealer initiates warranted parts replacements, and parts after the warranty come through the dealer or a Master Parts Distributor.

The Empire 18" Hydraulic Thermostat, White 18,000 Btu, Vent-Free Infrared Heater is Empire's 18 in white vent-free infrared (radiant) room heater: 18,000 BTU per hour on natural gas or propane (chosen when you order - the heater is built for one gas and is never converted), hydraulic thermostat that cycles the burner on at the full 18,000 BTU per hour and off again, a standing pilot you light with the piezo button, and an Oxygen Depletion Sensor pilot. Nothing in it needs electricity, so it heats through a power outage and, being vent-free, keeps 99.9 percent of the fuel's heat in the room. The ceramic plaques glow red-orange and radiate heat straight to you and the objects in the room, the way sunlight warms through a window.

Two variants in one listing: SR18TWNAT for natural gas and SR18TWLP for propane - the manual's SR-18TW-1. It hangs on the wall from four mounting screws or rests on the optional SRS18W floor stand, takes the SRB18TW automatic blower (the brochure also lists the SRB18W manual blower for this size), and is design-certified to ANSI Z21.11.2 by CSA as an unvented room heater. Rated over 10,000 BTU, it is not a bedroom or bathroom heater. Supplemental heat for a room, never the primary heat for a house.

This listing is part of the Empire Vent-Free Infrared Heater family - use the selector above to compare the sizes and control options.

Key Features

18,000 BTU vent-free radiant heat: natural gas (SR18TWNAT) or propane (SR18TWLP), fixed at purchase; the hydraulic thermostat cycles the burner on at full input and off when the room is satisfied; it does not modulate.
Runs without electricity: standing pilot, piezo pushbutton igniter and a gas control that needs no power or batteries - heat through an outage, 99.9 percent of the fuel's heat kept in the room.
Oxygen Depletion Sensor pilot: the pilot light safety system shuts the heater off when the room runs short of fresh air; the heater is relit only after fresh air is provided.
Thermostat you set once: LO to HI covers roughly 55 F to 90 F at the thermostat bulb at the bottom of the casing (not the room temperature); turn the knob to PILOT when no heat is wanted, since at LO the burner still lights when the bulb drops to 55 F.
Wall or floor: four wall-mounting screws (and plastic anchors for sheet rock) come in the hardware package; the SRS18W floor stand is the optional way to put it on the floor.
Blower-ready: The SRB18TW automatic blower (the brochure also lists the SRB18W manual blower for this size) fits behind the top louver and plugs into a grounded three-prong receptacle; the heater itself keeps running without it.
Warranty: Empire's limited lifetime parts warranty with five-year labor on the combustion chamber and heat exchanger, five-year parts and labor on all other components (except thermostats) and one-year parts on thermostats, accessories and parts - original purchaser, qualified installer, proof of purchase.
Qualified installer: installation, gas piping and service by a qualified agency to the National Fuel Gas Code ANSI Z223.1 / NFPA 54 and local codes (Massachusetts: a licensed plumber or gas fitter, a flexible connector no longer than three feet, and unvented heaters are prohibited in bedrooms and bathrooms).

Specifications

Nominal Size	18"
Models	SR18TWNAT (natural gas) / SR18TWLP (propane) - SR-18TW-1 in the manual
Heater Type	Vent-free infrared (radiant) ceramic plaque wall heater, supplemental heat
Input	18,000 BTU/h
Fuel	Natural gas or propane as ordered - not field-convertible
Control	Hydraulic thermostat (cycles on / off at full input)
Ignition	Standing pilot, piezo pushbutton igniter, ODS safety pilot - no electricity
Dimensions	18 in W x 22 in H x 6 1/2 in D
Gas Inlet	3/8 in NPT, in the bottom of the heater
Gas Pressure	Natural gas inlet 7.0 to 10.5 in w.c. (manifold about 6.0 in w.c.); propane inlet 11.0 to 13.0 in w.c. (manifold about 10.0 in w.c.)
Clearance to Combustibles	6 in each side; 0 in rear; 36 in to the ceiling; 36 in below a shelf or sill; 2 in above the floor; never in an alcove or closet
Venting	None - vent-free (unvented room heater); an unconfined space of at least 900 cu ft (50 cu ft per 1,000 BTU/h of all appliances in it) or combustion air per the National Fuel Gas Code
Electrical	None to run the heater; the optional blower plugs into a properly grounded three-prong receptacle
Mounting	Wall, on four mounting screws; or the optional SRS18W floor stand
Accessories	SRB18TW blower (manual); brochure also lists the SRB18W; SRS18W floor stand
Shipping Weight (brochure)	27 lb
Certification	ANSI Z21.11.2-2019 unvented room heater, CSA; mobile-home approved; not for bedrooms or bathrooms (over 10,000 BTU/h)
Warranty	Limited lifetime parts + 5-year labor (combustion chamber, heat exchanger); 5-year parts and labor (other components, except thermostats); 1-year parts (thermostats, accessories, parts)

What's Included

Heater with its standing pilot, piezo igniter and gas control
Hardware package: four #10 x 1 in mounting screws and four plastic expansion anchors
Installation instructions and owner's manual, warranty card
Not included: the SRS18W floor stand (sold with its own four screws), the SRB18TW blower

Installation & Planning

Where it may go: a wall or floor-stand position in a room of at least 900 cu ft; rated over 10,000 BTU per hour it is never installed in a bedroom or bathroom; Massachusetts prohibits unvented heaters in bedrooms and bathrooms; out of traffic and away from furniture and draperies; not in an alcove or closet; permitted in an aftermarket manufactured (mobile) home where codes allow.
Clearances: 6 in to each side wall, 0 in to the rear wall, 36 in to the ceiling, 36 in below any shelf or window sill, 2 in from the bottom of the heater to carpeting or tile, plus clearance around the air openings and for service.
Combustion and ventilation air: an unvented heater draws its air from the room: at least 50 cu ft of room volume per 1,000 BTU per hour of every appliance in it (900 cu ft for this heater alone), or two combustion-air openings sized per the National Fuel Gas Code; buildings of unusually tight construction need additional fresh air; expect about 1 oz of water vapor per 1,000 BTU of input per hour.
Mounting: on a solid wall drive the four #10 x 1 in screws, leave a 1/8 in gap under the heads and hang the heater on them; on sheet rock drill four 5/16 in holes for the plastic expansion anchors; the lower louver, reflector and upper louver come off (two screws each) and go back with the louver lip behind and the reflector lip in front of the heat shield; the SRS18W floor stand attaches to the bottom of the heater with its four screws.
Gas: 3/8 in NPT inlet in the bottom of the heater; its own manual shut-off, union, drip-line sediment trap and a 1/8 in NPT test tapping upstream; natural gas 7.0 to 10.5 in w.c. or propane 11.0 to 13.0 in w.c. inlet pressure; 1/2 in pipe for runs to 100 ft on natural gas (3/8 in propane to 10 ft); never plastic pipe or well-head gas.
Altitude: above 2,000 ft reduce the rating 4 percent per 1,000 ft; the manufacturer or gas company rules on orifice changes.
Blower: The SRB18TW automatic blower (the brochure also lists the SRB18W manual blower for this size): the heater comes off the wall (or stays on its floor stand) while the blower housing is fastened to the top heat shield with four screws and the cord set is led through the casing back; three-prong grounding plug into a properly grounded receptacle; unplugging the blower does not stop the heater.
Lighting and care: knob to OFF, wait 10 minutes, knob to PILOT, push in and press the piezo button until the pilot lights, hold about one minute, then counterclockwise to HI and set the thermostat; the gas control's interlock allows a relight about 60 seconds after a shut-off. Annual inspection and cleaning by the dealer before the heating season; no fans blowing at the heater, no scented candles or air fresheners while it runs.
Documents: the Empire installation instructions and owner's manual 39909-3-1124 (11/2024, the family manual that lists SR-18TW-1) and the Empire Heating Systems infrared and blue flame heaters brochure EHS-01032 are attached in the Documents tab.
Dealer service: warranty claims go through the installing dealer with the model number, serial number, type of gas and purchase verification; the dealer initiates warranted parts replacements, and parts after the warranty come through the dealer or a Master Parts Distributor.