MEMORANDUM FINDINGS OF FACT AND OPINION
HAMBLEN, Judge: Respondent determined a deficiency in the amount of $ 2,304.00 in petitioners' joint 1980 Federal income tax. The sole issue for determination is whether petitioners are entitled to a residential energy credit under section 44C(a)(2). 1
Some of the facts have been stipulated and are found accordingly. The stipulation of facts and attached exhibits are incorporated herein by this reference.
Petitioners resided in Norfolk, Virginia, when they filed their joint 1980 Federal income tax return and when they filed their petition in this case.
On August 24, 1980, petitioners entered into a contract with AAA Heating and Cooling Company (AAA) of Virginia Beach, Virginia, to install a water source heat pump system (system) in their residence. The system consists of two 53-foot deep wells, water pump, air ducts, registers, compressor, breaker boxes, and thermostats and associated electric circuits. The system operates to heat and cool their residence by exchanging heat to and from underground water from a depth of 53 feet. The average wellhead temperature of the water source used in petitioners' system is 16.6 degrees Celsius. Prior to the installation of the system, petitioners' residence employed a natural gas fired hot water boiler heating system and refrigerant type window cooling units. The installation was completed and the system placed in operation on September 7, 1980, at a total cost of $ 5,760.00. Petitioners' heating and cooling costs have been reduced by an average of 50 percent or more yearly as a result of the system. AAA assured petitioners that their system qualified for a residential energy credit under section 44C. Petitioners subsequently claimed this credit on their 1980 Federal income tax return. Petitioners did not claim a credit under section 44C for any year prior to 1980.
Petitioners contend that they qualify for the residential energy credit of section 44C since the energy used by their system to provide heat and cooling is from a geothermal deposit as that term is used in section 44C(c)(5). Petitioners recognize that the system is not geothermal energy property as defined in section 1.44C-2(h), Income Tax Regs., but argue that this regulation is invalid as an unconstitutional delegation of the legislative power of Congress and for being in conflict with the intent of the statute. Petitioners also object to the retroactive application of the regulation. Respondent contends that the regulation is valid and applies to petitioners. Accordingly, respondent contends that the system is not geothermal energy property.
Section 44C(a)(2) generally provides that an individual taxpayer shall be allowed a credit for qualified renewable energy source expenditures. A renewable energy source expenditures must be made with respect to renewable energy source property. Sec. 44C(c)(2)(A). Renewable energy source property specifically includes certain property which transmits or uses energy derived from geothermal deposits. Sec. 44C(c)(5). 2
Section 44C(6)(A)(i) specifically authorizes the Secretary to issue regulations which establish criteria to be used in prescribing performance and quality standards for renewable energy source property. The Secretary has issued regulations for geothermal energy property which provide, in pertinent part:
(h) Geothermal energy property. The term "geothermal energy property" means equipment (and parts solely related to the functioning of such equipment) necessary to transmit or use energy from a geothermal deposit to heat or cool a dwelling or provide hot water for use within the dwelling. With respect to expenditures made after December 31, 1979, the term "geothermal energy property" also means equipment (and parts solely related to the functioning of such equipment) necessary to transmit or use energy from a geothermal deposit to produce electricity for use within the dwelling. Equipment such as a pipe that serves both a geothermal function (by transmitting hot geothermal water within a dwelling) and a non-geothermal function (by transmitting hot water from a water heater within a dwelling) does not qualify as geothermal property. A geothermal deposit is a geothermal reservoir consisting of natural heat which is from an underground source and is stored in rocks or in an aqueous liquid or vapor (whether or not under pressure), having a temperature exceeding 50 degrees Celsius as measured at the wellhead or, in the case of a natural hot spring (where no well is drilled), at the intake to the distribution system. [Sec. 1.44C-2(h), Income Tax Regs.; emphasis added.] 3
The Supplementary Information relating to the regulations explains that the 50 degree Celsius temperature limitation was included in the final regulations for the following reasons:
Several comments suggested that the definition of geothermal deposit be revised either by deleting the 60 degree Celsius temperature limitation or by lowering the temperature limitation. The temperature limitation has been lowered to 50 degrees Celsius. It has been concluded that 50 degree Celsius is an appropriate measure for determining whether heat is derived from geothermal reservoirs (heated by the earth's magma) or is derived from heat associated with ground water that is affected by atmospheric temperatures. [T.D. 7717, 1980-2 C.B. 7,9.] 4
Petitioners have stipulated that the wellhead temperature of the water source is 16.6 degrees Celsius, far short of that required by the regulation. Absent the regulation's being invalid pursuant to petitioners' claims, petitioners clearly do not quality for the residential energy credit.
Petitioners' first contention is that the regulation is invalid as an unconstitutional delegation of legislative powers. It is well established that Congress may invest the Secretary of Treasury with authority to prescribe regulations not inconsistent with law and that such delegation is not unconstitutional. Sec. 7805(a); Brushaber v. Union Pac. R.R.,240 U.S. 1 (1916). Accordingly, we reject petitioner's argument.
Petitioners also contend the regulation is invalid as it is contrary to the intent of the statute. Regulations promulgated pursuant to specific statutory authority are legislative in nature and are given great weight by this Court. Wing v. Commissioner,81 T.C. 17, 28 (1983). If consistent with the statutory authorization adopted pursuant to proper procedure, and reasonable, they have the force of law. Anderson, Clayton & Co. v. United States,562 F.2d 972, 976 (5th Cir. 1977), cert. denied 436 U.S. 944 (1978). Such legislative regulations must be sustained unless plainly inconsistent with the statute they are intended to implement. Olson v. Commissioner,81 T.C. 318, 323 (1983). Petitioners' argument that the regulation does not reflect the intention of Congress has been previously considered in cases with facts similar to those present here and rejected by this Court. Peach v. Commissioner,84 T.C. 1312 (1985), affd. without published opinion 805 F.2d 393 (4th Cir. 1986). 5 We need not elaborate on this issue.
Petitioners' objection to the retroactive application of the regulation also has been considered and rejected by this Court. In Peach v. Commissioner, supra, the Court observed that under section 7805(b) respondent may apply regulations retroactively unless otherwise specified. The Court further noted that "except in unusual circumstances, making a regulation retroactive is not an abuse of discretion by the Commissioner." Peach v. Commissioner, supra at 1318.
Petitioners requested a waiver of all interest due on the deficiency. This Court has limited jurisdiction and generally interest is not within our jurisdiction. Standard Oil Company v. McMahon,244 F.2d 11, 13 (2d Cir. 1957); LTV Corp. v. Commissioner,64 T.C. 589, 597 (1975). But see Estate of Baumgardner v. Commissioner,85 T.C. 445 (1985). We, therefore, cannot grant petitioners the relief they seek.
To reflect the foregoing,
Decision will be entered for the respondent.