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Internet # 202312950

Model # KS2004

Store SKU # 961666

2000 Series 4,000 BTU Hot Water Kickspace Heater in Stainless Steel (Not Electric)

$250.43
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  • Stainless steel finish for corrosion resistance & easy cleaning
  • Built-in thermostat for desired results
  • Ideal for 100 sq. ft. bedroom, bathroom or kitchen
  • View More Details

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Product Details

About This Product

The Quiet-One 2000 Series 4,000 BTU Brown Hydronic Kickspace Heater is ideal for installation in hard-to-heat spaces. This totally enclosed unit easily fits under a cabinet or in a wall. The highly efficient heat exchanger with a low water content ensures that the built-in thermostat responds quickly.

Highlights

  • 18-Watt kickspace heater at 120-Volt creates adequate warmth for a hard-to-heat area
  • 100 sq. ft. Heating capacity ideal for a smaller bedroom, bathroom or kitchen
  • Highly efficient heat exchanger with low water content to allow the built-in thermostat to respond quickly
  • High E heat exchanger, low-power motor and a fan with easy glide sleeve bearings ensure low electrical usage
  • Totally enclosed unit can slip easily under a cabinet or in a wall
  • Chassis does not have to be screwed to the floor
  • Removable grille
  • Quiet-One by smith environmental products
  • Return Policy

Product Information

Internet # 202312950

Model # KS2004

Store SKU # 961666

Specifications

Dimensions: H 3.5 in, W 13.9 in, D 10.9 in

Dimensions

Product Depth (in.)

10.9 in

Product Height (in.)

3.5 in

Product Width (in.)

13.9 in

Details

Automatic shutoff

No

Color

Stainless Steel

Fuel Type

Hydronic

Heat rating (BTU/hour)

4810 Btu/h

Heater Controls

Pushbutton

Heater Type

Other

Heating Technology Type

Convection

Ignition Type

No Ignition System

Indoor/Outdoor

Indoor

Installation

Recessed

Max. Motor Speed (RPM)

0 RPM

Number of Heat Settings

2 Heat

Pack Size

1

Power/Fuel Type

Other

Product Weight (lb.)

9.1 lb

Remote Control

No

Returnable

90-Day

Room Size (sq. ft.)

Less than 150

Thermostat

Yes

Timer Included

No

Vented

No

Warranty / Certifications

Certifications and Listings

CSA Listed, UL Certified

Manufacturer Warranty

Limited Warranty

Questions & Answers

Where is this product made?
ByJul 9, 2026
1 Answer | 
Answer This Question

Smith’s Environmental is owned by the Swan Group and American company based in Massachusetts. This product is manufactured from globally sourced components in their factory in Chelmsford, England. The factory is about a one-hour drive North East of London.

By|Jul 13, 2026


    IF USED TO REPLACE AN EXISTING UNIT THAT IS PIPED WITH 1/2 " COPPER, ARE THE SCOOP TEES NECESSARY?
    ByJan 20, 2026
    1 Answer | 
    Answer This Question

    Most heating zones in the US are piped using ¾” tube because of it is capable 45,000 BTUs per hour at 180 F vs 1/2” which can only carry 12,000 BTUs. So that you don’t reduce the capacity of the entire ¾ zone by installing a ½” appliance in the series, scoop aka monoflo tees are used to pipe a ½” loop off the ¾” loop. If you are replacing an old 1/2 “ kick space, heater that worked, I would assume you already have this piping configuration and would not need scoop tees to replace the ones you have. But then again, I am not certain of what piping methodology you have based on the information you have provided. You are welcome to give me a call, and we can get into more specifics. Chris 978 651-3301.

    By|May 18, 2026

      (1)

      Can I install this unit to replace an older unit which is installed on an existing 1/2 inch copper loop?
      ByNov 19, 2025
      1 Answer | 
      Answer This Question

      Generally speaking, yes you can replace and old kick space heater with a new kick space heater. If you have further quesitons or would like to speak about this in greater detail give me a call. Chris 978 651 3301

      By|May 18, 2026

        (1)

        Should the pipe bases look like this out of the box? It almost looks like it was used?
        ByOct 31, 2025
        1 Answer | 
        Answer This Question

        The way the questions are routed to me I cannot see your picture. But as I have received calls in the past, I will assume you are questioning why the copper is either green or black. The fabrication of the coils involves brazing. This process utilizes high heat and flux; an acid. This process will discolor the copper and can even turn it green in the time it takes the units to get from the factory in England to your home. This poses no problem, other than raising concern in the mind of some customers. It does not indicate that that the product has been used or is defective. And the oxidation will not continue or accelerate. The water in a hydronic heating system does not contain oxygen. The air is eliminated, and the same water is used for long periods of time. Boiler water may look dirty but it is noncorrosive due to the lack of oxygen. If you still have concerns, feel free to give me a call and you can text me pictures of your specific unit and I will take a look. Chris 978 651 3301 If my assumption is correct, you have nothing to be concerned about.

        By|May 18, 2026

          (1)

          What is the decibel level on low and what is the decibel level on high
          ByFeb 19, 2024
          1 Answer | 
          Answer This Question

          Per the manufacturer’s web site, the decibel rating at low speed is 33 and 38 on high.

          By|Feb 21, 2024


            Can the fans be turned off if you don't want them to run to limit the noise? I understand there heat won't be pushed out as far without the fans on.
            ByDec 18, 2023
            1 Answer | 
            Answer This Question

            Yes. If you look at the pictures carefully you will see a switch in the face plate. It has three fan speed settings. High, Low and Off.

            By|Dec 18, 2023


              Hello Chris, could you lead me in the direction where I can fine how to on installation? Like under the cabinet and using the hose kit or even how to remove in-service at a later date Thanks
              ByDec 6, 2023
              1 Answer | 
              Answer This Question

              Under the pictures on the Home Depot product listing page is a section entitled “Product Details”. If you expand that section, you will find PDFs of the product documents, including the installation instructions. The are essentially three companies that make hydronic kick space heaters. Myson, Mestek which markets there product under several brand names including Hydro Therm, Beacon Morris and Turbonics and Smiths Environmental which calls its product Quiet One. It’s a small category and in my opinion, I think all the brands have poor instruction, although all installations are different. After reviewing them if you have any questions feel free to give me a call. In the old days plumbers would hard pipe these in copper. Then install the cabinets. But then when the unit needed repair or maintenance you ended up having to cut the floor out of the base cabinet above to gain access. Hence the creation of hosed kits for the last few feet. This allows you to unscrew the Quiet One unit and pull them out from under the cabinet to service. In what I consider the best installation I have ever seen the installing contractor put draw slides on the side of the unit so it could be pulled out and serviced. It was a little extreme, but I was impressed at the thoughtful way the entire home was built. Chris 978 651 3301

              By|Jun 16, 2026

                (3)

                Can these be turned vertical for install
                BySep 27, 2023
                1 Answer | 
                Answer This Question

                Yes, you can install this kick space heater in the vertical position. In fact, when it is installed in the optional wall kit, The KSWK it would be mounted in a vertical position. However, I would not install it in a floor as the grill is not built to be walked on. For a floor application I would use the FL100 floor unit.

                By|Sep 27, 2023


                  Viewing 1-8 of 42

                  Customer Reviews

                  4.4 out of 5

                  • 4.4 out of 20 reviews
                  • 71% recommend this product
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                  Showing 1-10 of 20 reviews
                  Junk: Unit insides Leaks!
                  Horrible quality-factory made parts leaks inside! Look at how bad the pipes look inside! Imagine cutting your cabinet & running lines only to find the unit itself is junk????
                  by
                    Great unit
                    Sturdy quiet unit very happy with it
                    by
                    • Verified Purchase
                    • Recommended
                    1 found this review helpful
                    Quiet, compact and efficient. This heater is easy to install, too.
                    This unit is an exact replacement for an under-the-stair heater over 20 years old. The old one was sold under the VRV Products name. This new one is Smith’s Environmental. Same unit, though. This product is heavily made. No frills, but no shortcuts, either. The older one lasted 20 or more years. They look identical, so the new one ought to last as well. There’s a handy hi/lo fan switch, but I just leave it on high all the time. It pulls air in from the top and blows heated air out the front. The fan runs quietly and automatically. When your boiler sends hot water to this unit, the fan turns on. If there’s no hot water present, the fan goes off. Simple. There are no instructions to speak of. Plumbing is easy – two ½ inch copper pipes. They tell you which pipe is the inlet (lower) and which is the outlet (upper). I soldered on copper fittings and used unions to connect to the heating system. You can use PEX, as well, which may be easier. There’s an easy-to-reach bleeder valve for getting air out of the heater after installation. Electric is simple – black wire, white wire and a ground lug. You will need two wire nuts and a standard 3/8 inch through-hole clamp, not supplied with the unit. It took me about an hour to remove the old heater and install this unit. It worked right away and is heating the space now. I am pleased with this purchase, would recommend it, and happy to have found it at Home Depot.
                    by
                    • DIY
                    • Recommended
                    18 found this review helpful
                    Serves the purpose. Just ordered a third one/
                    by
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                        Compare Key Features

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                        Product Snapshot

                        Ideal for small spaces, this 4, 000 BTU hydronic kickspace heater offers efficient warmth and quick thermostat response.
                        Ideal for hard-to-heat areas, this hydronic kick space heater offers 8, 400 BTUs and two heat settings for customized comfort.
                        Ideal for small spaces, this 7, 100 BTU hydronic kickspace heater offers efficient warmth and easy installation under cabinets or in walls.
                        Ideal for hard-to-heat areas, this hydronic kick space heater offers 12, 000 BTUs and two heat settings for customized comfort.

                        Heating Capacity

                        100 sq. ft.
                        250-400 sq. ft.
                        150 sq. ft.
                        400-600 sq. ft.

                        BTU Rating

                        4810 Btu/h
                        8400 BTU/h
                        7800 Btu/h
                        12000 Btu/h

                        Thermostat Control

                        Dual Fuel Capability

                        Electricity-Free Operation