We specialize in Service/Repair, Installation of new equipment, Duct design and installation, Change outs, Mini splits, New construction (Although rare, I'll explain below), Renovations, Add-ons, Heat load calculations, Evaporative coolers, Gas furnaces, Heat pumps, Package units & more. Serving Sonora, Jamestown, Standard, Mono Vista, Columbia, Tuolumne, Angels Camp, Stockton and more.