July 13, 2011, Introduced by Senator GREEN and referred to the Committee on Regulatory Reform.
A bill to amend 1972 PA 230, entitled
"Stille-DeRossett-Hale single state construction code act,"
(MCL 125.1501 to 125.1531) by adding section 13f.
THE PEOPLE OF THE STATE OF MICHIGAN ENACT:
Sec. 13f. Log walls are permitted in residential buildings if
all of the following requirements are met:
(a) The log walls have a minimum average wall thickness of 5
inches or greater.
(b) The log walls comply with the international code council
standard on the design and construction of log structures, ICC 400-
2007, or other successor standard that the department may specify
by rule.
(c) The area weighted average U-factor for fenestration
products in the log walls is a maximum of 0.31.
(d) All energy efficiency requirements of this act and rules
promulgated under this act applicable to components other than log
walls are met.
(e) The building heating equipment is qualified under the
energy star program jointly operated by the United States
department of energy and the United States environmental protection
agency as provided for in 10 CFR part 430 or the building heating
equipment meets or exceeds the following United States department
of energy ratings:
(i) For a gas furnace, an annual fuel utilization efficiency
(AFUE) of 90.
(ii) For an oil furnace, an annual fuel utilization efficiency
(AFUE) of 85.
(iii) For a boiler, an annual fuel utilization efficiency (AFUE)
of 85.
(iv) For a split system air source heat pump, an 8.2 heating
seasonal performance factor (HSPF).
(v) For a closed loop water-to-air geothermal heat pump, an
energy efficiency rating of 14.1 and a coefficient of performance
of 3.3.
(vi) For an open loop water-to-air geothermal heat pump, an
energy efficiency rating of 16.2 and a coefficient of performance
of 3.6.
(vii) For a closed loop water-to-water geothermal heat pump, an
energy efficiency rating of 15.1 and a coefficient of performance
of 3.0.
(viii) For an open loop water-to-water geothermal heat pump, an
energy efficiency rating of 19.1 and a coefficient of performance
of 3.4.
(ix) For a direct geothermal exchange, an energy efficiency
rating of 15.0 and a coefficient of performance of 3.5.