We are looking to replace a gravity furnace in a 1937 Los Angeles home, with asbestos ductwork. The house is two-story and 1800 sq ft. We do not have A/C and are not planning to add an a/c. We would like to be more energy efficient if possible (and we hope to do attic sealing and add insulation), but we have a very limited budget, so we cannot go for those projects that require very high initial outlays. We also hope to get an energy audit before we do anything, but we would like to know how to understand/compare any initial quotes we are getting.
All that I know about heating is what I have been reading ******, and I just want to make sure I am getting the appropriate elements included within any quote from an HVAC contractor. I have some questions, so I just hoping that someone more knowledgeable than I can weigh in on the following.
* We currently have ducts with vents near the floor on the interior walls. Is the location of these vents appropriate for a forced air furnace?
*There is not currently a return register. Should there be one on each floor? How many?
* We have 8" ductwork. We will be replacing the ducts because we want to get rid of the asbestos, but is 8" the correct size for a furnace in a house this size?
*What is the rough estimate of the appropriate size of the furnace unit for this size house?
Please let me know if there is more information needed to figure out these questions & thank you in advance!