[. . . ] Use a hand sheetrock saw and provided templates to cut the openings for the blower and diffuser. Case History 2a. [. . . ] It features an on-off switch on the bottom of its grille and accommodates electrical outlets on the right or left side. 2. Hardwired Model AS1 requires a 120 VAC electrical connection from within the wall cavity. The diffuser is installed in the same wall cavity in the adjacent room. AireShareTM ventilators enhance performance and comfort of split system air handlers Harbor View Windows, Heating and Air, Inc. , based in Brookings, Oregon, has installed ductless split system heating/cooling for years and is a top producing dealer. "We thought it might be a great solution to a long term problem. . . to flip a switch and be able to draw air conditioned or heated air out of the main rooms into the small rooms and it's working perfectly, " said Pat and Sherry Nied, Harbor View's owners. The Nieds believe a cost-effective way has finally been found to make ductless systems deliver comfort in a wide range of residential applications. "We think AireShareTM, in unison with the ductless system, fills a gap that has persisted. " Dimensions AS1 & PS2501 FAN PROVING SWITCH (Room-to-Room): Diffuser for Models AS1 and PS2501 FAN PROVING SWITCH 3 7/8" 3" 7 3/4" 7 3/4" Grille for Model AS1 Grille for Model PS2501 FAN PROVING SWITCH 15 1/8 " 15 3/4 " 1/4" 16 " 1 1/4" Dimensions ASLL (Level-to-Level): Model ASLL Floor Grille Ceiling Grille 12 1/4 " Expands from 8 3/4" to 16 1/2" /4" 13 3/4 " 5 3/4" 13 1/2 " 5 1/2" 41 Quick Comfort Calculation: Multiply the Length x Width x Height of uncomfortable room (in feet) and then divide by 75 to determine the number of minutes needed to bring the uncomfortable room to nearly the same air temperature as adjacent room. [. . . ] Ft ÷ 75 = 24 minutes Uncomfortable room dimensions: L_________ x W_________ x H_________ ÷ 75 = _______minutes This calculation relates to air temperature and makes certain basic assumptions. [. . . ]