NR 440.642(1)(e)(e) Affected facilities manufactured in the U.S. for export are exempt from the applicable emission limits of sub. (3) and the requirements of sub. (4). NR 440.642(1)(f)(f) A wood heater used for research and development purposes that is never offered for sale or sold is exempt from the applicable emission limits of sub. (3) and the requirements of sub. (4). No more than 50 wood heaters manufactured per model line may be exempted for this purpose. NR 440.642(1)(g)(g) A coal-only heater is exempt from the applicable emission limits of sub. (3) and the requirements of sub. (4). NR 440.642(1)(h)(h) The following are not affected facilities and are not subject to this section: NR 440.642(1)(i)(i) Modification or reconstruction, as defined in ss. NR 440.14 and 440.15, does not, by itself, make a wood heater an affected facility under this section. NR 440.642(2)(2) Definitions. As used in this section, terms not defined in this subsection have the meanings given in s. NR 440.02. NR 440.642(2)(a)(a) “At retail” means the sale by a commercial owner of a wood heater to the ultimate purchaser. NR 440.642(2)(b)(b) “Boiler” means a solid burning appliance used primarily for heating spaces, other than the space where the appliance is located, by the distribution through pipes of a gas or fluid heated in the appliance. The appliance shall be tested and listed as a boiler under accepted American or Canadian safety testing codes. A manufacturer may request an exemption in writing from the administrator by stating why the testing and listing requirement is not practicable and by demonstrating that this appliance is otherwise a boiler. NR 440.642(2)(c)(c) “Coal-only heater” means an enclosed, coal-burning appliance capable of space heating, or domestic water heating, which has all of the following characteristics: NR 440.642(2)(c)1.1. An opening for emptying ash that is located near the bottom or the side of the appliance. NR 440.642(2)(c)3.3. A grate or other similar device for shaking or disturbing the fuel bed or power-driven mechanical stoker. NR 440.642(2)(c)4.4. Installation instructions that state that the use of wood in stove, except for coal ignition purposes, is prohibited by law, and NR 440.642(2)(c)5.5. The model is listed by a nationally recognized safety-testing laboratory for use of coal only, except for coal ignition purposes. NR 440.642(2)(d)(d) “Commercial owner” means any person who owns or controls a wood heater in the course of the manufacture, importation, distribution, or sale of the wood heater. NR 440.642(2)(e)(e) “Cookstove” means a wood-fired appliance that is designed primarily for cooking food and that has the following characteristics: NR 440.642(2)(e)1.1. An oven, with a volume of 0.028 cubic meters (1 cubic foot) or greater, and an oven rack, NR 440.642(2)(e)7.7. The absence of a fan or heat channels to dissipate heat from the appliance. NR 440.642(2)(f)(f) “Furnace” means a solid fuel burning appliance that is designed to be located outside of ordinary living areas and that warms spaces other than the space where the appliance is located by the distribution of air heated in the appliance through ducts. The appliance shall be tested and listed as a furnace under accepted American or Canadian safety testing codes unless exempted from this provision by the administrator. A manufacturer may request an exemption in writing from the administrator by stating why the testing and listing requirement is not practicable and by demonstrating that the appliance is otherwise a furnace.