I have 2" Z Furring and 2" rigid insulation to install in the 3 exterior walls in the basement... The sooner I can get that completed the sooner I can get into building the panel for the in floor heating and sorting out what I want to use for a heat source...The pex is in the concrete ready to go with 4 zones... Leaning towards a propane tankless water heater...I have no access to natural gas on my road...