Speedi-Vent SV-4127 SB Hvac Install Kit Speedi-Vent is made in the USA Everything you need to install a heating & air register drop in one kit Now it is simple & easy to add more heating and cooling capacity to any room Speedi-vent will save you energy, time, labor, & money with your heating & cooling system Do your installation & hvac expansion job in an hour or less instead of an all day projec