HVAC for 2 stories: 2 systems or single zoned unit?
Confused on which way to go, new construction and HVAC….
2 separate HVAC systems vs a single zoned system?
Generally speaking mind you, our new house will be about 3,000 sq ft and 2 stories. I’ve done a bit of reading on a few sites and kind of stuck on which way to approach HVAC.
Option 1: 2 separate systems, 1 for each floor. I like the redundancy factor. The obvious downside, ,the cost of 2 units and maintaining them on a yearly basis. Basically 2X the costs regarding maintenance and the same goes for replacing the systems.
Option 2: 1 PROPERLY installed and zoned system. I’ve dug and dug and then dug more, I’ve got a local company who I am very confident in. They sell and install Carrier equipment but will install any equipment of my choosing. I would lean towards American Standard only due to prior experience with the brand.
When the day is done, it’s all about the install and not so much the brand of equipment.
I’ve been in countless 2 story houses where in just about every case, the upstairs has ALWAYS been hotter when the house had a single unit installed. Either the install was awful or there are other issues. I’ve been in several 2 story houses with 2 units and across the board, a nice even temperature between both floors.
Local company indicates they can install as many as 8 zones on one system. Another expense would be 8 thermostats and I am partial to the Nest Thermostat so there goes another big chunk of change for thermostats.
On the single zoned unit, assuming the installers know what they are doing mind you what additional maintenance issues are there with a zone unit vs a unit that is not zoned? On the flip side if we did a single unit that is zoned and we were not happy and wanted to add a second unit, would that duct work be able to work correctly when a second system was added say for the upstairs?
I’m pretty confident in the 2 systems, not so much so with a single zoned system. We are in Zone 1 in Pensacola and in the summertime, extremely HIGH humidity is the norm here.