Is this unit too large for 1200 sq feet?

The best way to answer your question would be to reference our Sizing Guide (https://hvacdirect.com/sizing-air-conditioner-and-heater.html/). Determining what the appropriate size unit you need will vary depending on where you live. Our Sizing Guide (located at the top of our website) is a great resource to use to determine this. On the guide, scroll down to the Quick Sizing calculator. Enter your home's square footage and your zip code and it will calculate the appropriate heating and cooling BTUs for your home. If your result matches the heating BTUs and tonnage of the PHD442000K000F, then its the right unit for you. If not, you will need to choose a unit that closer matches your results. If you need any help with finding the right size unit or sizing your home, please call us and our experts will be happy to assist you.