Which heat pump for radiant heat other than Arctic?

I asked questions earlier about HVAC design here:https://www.greenbuildingadvisor.com/question/please-help-me-understand-my-mechanical-planMechanical engineer was asked to revise, and returned with the revised heating load of 58MBH.I asked to avoid using natural gas (which was… I asked questions earlier about HVAC design here:https://www.greenbuildingadvisor.com/question/please-help-me-understand-my-mechanical-planMechanical engineer was asked to revise, and returned with the revised heating load of 58MBH.I asked to avoid using natural gas (which was…Read MoreGreenBuildingAdvisor