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provide a temperature range of up to 10 F between full heating and full cooling in sequence. It shall be adjustable to provide a temperature range of up to 10 F between full heating and full cooling, except as followed in 503.3(c)4b. (n) The introductory paragraa2 _:f Section 503.9 in the energy code as adopted March 21, 1979, r�:iui]^s ds `ollows: All duct work shall 'be cor.strucLad and erected in accordance with standards RS -15, RS -16, RS -17, RS -18, RS -19, or RS -20, as applicable, which standards supersede the standards in Section 502 of the Standard Mechanical Code now or hereafter in effect as adopted by the county. The other provisions of Chapter V of the said mechanical code apply to the extent the specific criteria are not addressed in any applicable RS standards. If there is a conflict between any provisions of Chapter V of said mechanical code as amended or hereafter and the RS standards, the RS standards shall control. Subparagraphs (a), (b) and (c) of Section 503.9 are not amended. This amendment continues from the original adoption of the energy code on March 21, 1979. (o) Add the following paragraph 504.2(a)2 at page 5-26 of the energy code between when tested in accordance with Standard RS -7" and "EXCEPTION:-:" All gas-/ and oil -fired water heaters having an input rate over 75,000 Btu/h (22kw) but less than 4,000 Btu/h per gallon (0.3 kw/liter) of self -stored water shall also have a standby loss not exceeding: X = 2.8 + p/002 Q/V Where Q = rated input in Btu/h; V =3 rated volume in gallons (S = 2.8 + 25/9 Q/Y for V of 1.52 m or less; or S = 2.8 + 41 Q/V for V exceeding 1.52 m ) when tested in accordance with Section 2.8 of Standard RS -7. (For determining the efficiency of oil fired units, CF = 1.0; Q = total gallons of oil consumed; and H = total heating value of the oil in Btu/gallon). (p) The italicized paragraph in paragraph (e) of Section 505.2 of the energy code remains deleted. Said deleted paragraph reads as follows: A single meter for the building can be installed to determine power company charges with submetering for each tenant to prorate the charges between tenants. (q) Add the following after the last sentence of paragraph 602.2(a) at page 6-1 of the energy code: Charts 6-C and 6-D shall be used for Group R buildings. Thermal mass factor M = 0.8. (r) Subparagraphs 1 and 2 of Subsection 603.3 on page 6-5 of the energy code are hereby amended to read as follows: 1. Where used to control heating only, a maximum temperature setting of 72 F. 2. Where used to control cooling only, a minimum temperature setting of 78 F. (s) Add Chart 6-C by an inserted new page numbered 6-10.1 following page 6-10 of the energy code. Add the following sentence under the heading of said Chart 6-C: (Includes mass factor of 0.8) Also add Chart 6-D to the reverse side of said new page 6-10; number said reverse side page 6-10.2 and add the following under the heading of said Chart 6-D: (Includes mass factor of 0.8) -4-