How Hot Can You Heat A Modpool? July 28, 2020 19:41 The 400k BTU heater can heat the Modpool to 104 degrees. Related articles How Do I Get a Modpool Into My Backyard? Can I Get a Saltwater Modpool? What Preparation/Work Needs to Be Done by the Customer for Installation? Why Should I Purchase a Modpool? Would a Pool Servicing Company Be Able to Do Maintenance on a Modpool?