referring to the figures , it can be understood that the present invention is embodied in an animal house 10 that is aesthetically pleasing yet can be modified to maintain a comfortable environment for an animal inside the house . house 10 comprises an outer body 12 that is in the shape of an obelisk . as used herein , an obelisk is the frustum of a rectangular pyramid . housing 12 has a rectangular base 14 which rests on the ground when the outer body is in use . rectangular base 14 includes four side edges , such as edge 16 , and four trapezoidal side walls , such as side wall 18 . each side wall has a base edge , such as base edge 20 , which is unitary with one of the side edges of the rectangular base . each side wall further has two non - parallel side edges , such as side edges 22 and 24 , and a top edge 30 that is parallel with and spaced apart from the base edge of the side wall . a rectangular top wall 40 is parallel with and spaced apart from rectangular base 14 and has four side edges , such as side edge 44 , each of which is unitary with a top edge of each of the side walls . the outer body is hollow with the rectangular base , the side walls and the top wall all combining with each other to define an interior volume 50 inside the outer body . an entranceway 60 is defined through one of the side walls . entranceway 60 includes two triangular side elements 62 and 64 which are unitary with one of the side walls of the body . each side element has an apex 66 that is unitary with one of the side edges of the rectangular base . a rectangular overhang 70 is unitary with the side wall that is unitary with the triangular side elements and with the bases of the two triangular side elements and extends parallel to and spaced apart from the rectangular base . an inner body 80 is shaped to match the outer body and , as can be understood from fig2 , is slightly smaller than the outer body to be accommodated in the interior volume of the outer body . the inner body is removably accommodated inside the interior volume of the outer body to it can be changed as will be understood from the teaching of this disclosure . inner body 80 includes a plurality of trapezoidally shaped side walls , such as side wall 82 that are each located immediately adjacent to a corresponding trapezoidally shaped side wall of the outer body and a rectangular top wall 84 that is located immediately subadjacent to rectangular top wall 40 of the outer body . inner body 80 is hollow with the rectangular base of the outer body , the side walls of the inner body and the top wall of the inner body all combining with each other to define an interior volume 88 inside the inner body . as can be understood from fig2 , interior volume 88 coincides with interior volume 50 . a rectangular overhang 90 is unitary with one of the side walls of the inner body and is located immediately subadjacent to rectangular overhang 70 of the outer body and the entranceway . a plurality of flexible flaps , such as flap 100 , hang dependently from rectangular overhang 90 of the inner body and contact the ground adjacent to the outer body to cover the entranceway while permitting an animal ingress to and egress from the interior of the house 10 . a gap 104 is defined between the side walls of the inner body and the side walls of the outer body and between the top wall of the inner body and the top wall of the outer body and between the overhang of the inner body and the overhang of the outer body . insulation 110 is located in the gap . the insulation is of the type commonly used on residential buildings and is sold in sheet form . an interior volume environment conditioning element 120 is mounted on the top wall of the inner body in the interior volume of the inner body . in the form shown in fig2 , element 120 is a heating element to heat the interior of the house during cold weather . however , a fan 120 ′ can be used in place of heating element 120 during hot weather to cool the interior of the house . the element 120 can be powered using an extension cord connected to utility power if suitable . alternatively , the tops 40 and 84 of the housings can be removable from the side walls so the elements 120 and 120 ′ can be changed . the pyramid shape of the house is not only aesthetically pleasing , it acts to control heat transfer to and from the house . the removable nature of the inner body with respect to the outer housing and the slab form of the insulation makes it easy to change the house to accommodate weather conditions . while various embodiments of the invention have been described , it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of this invention . accordingly , the invention is not to be restricted except in light of the attached claims and their equivalents .
an insulated pet house is shaped in the manner of a pyramid to maintain a comfortable environment for an animal and which is also aesthetically pleasing . the pet house includes an interchangeable top portion that has a heat - generating lamp for cold - weather use and another portion has a fan for hot - weather use .