Maryland Code, Housing and Community Development § 4-218

(i) caulking or weather stripping;

(ii) a clock thermostat;

(iii) ceiling, attic, wall, floor, or duct insulation;

(iv) water heater insulation;

(v) a storm window or door, multiglazed window or door, or heat-absorbing or heat-reflecting window or floor material;

(vi) a device associated with load management techniques;

(vii) an automatic energy control system;

(viii) machinery, equipment, or a facility that uses groundwater as a heat source for a heating system or as a heat sink for an air conditioning system;

(ix) a furnace efficiency modification, including:

(x) any other energy conservation improvement that the Administration determines by regulation to be appropriate and consistent with this subtitle; or

(i) caulking or weather stripping;

(ii) insulating the building structure or a system in the building;

(iii) a storm window or door, a multiglazed window or door, a heat-absorbing or heat-reflecting window or door system, glazing, a reduction in glass area, or another window or door system modification;

(iv) an automatic energy control system;

(v) equipment that is associated with an automatic energy control system and that is required to operate a variable steam, hydraulic, or ventilation system;

(vi) the replacement or modification of a lighting system to increase energy efficiency without increasing the overall illumination, unless the increase in illumination is necessary to conform to State or local law;

(vii) an energy recovery system;

(viii) a cogeneration system;

(ix) machinery, equipment, or a facility that uses groundwater as a heat source for a heating system or as a heat sink for an air conditioning system;

(x) a modification of a furnace or utility plant and distribution system including:

(xi) any other energy conservation improvement that the Administration determines by regulation to be appropriate and consistent with this subtitle; or