Zone 1: Hot Climate

About Climate Zone 1

Climate Zone 1 encompasses the hottest regions of the United States where heating demand is minimal or nonexistent. These areas experience year-round warm temperatures with only brief, mild cool periods that rarely require sustained heating. Homes in Zone 1 are designed primarily for cooling, with air conditioning being the dominant energy consumer. Propane usage in Zone 1 is primarily for non-heating applications such as water heating, cooking, pool and spa heating, and outdoor living appliances. The minimal heating demand means propane furnaces are rarely installed, and when present, they operate for only a few weeks per year. Homeowners in Zone 1 benefit from the lowest heating costs in the nation but may face high propane prices due to limited local demand and distribution infrastructure.

States in Zone 1

The following 2 states fall within Climate Zone 1. The table shows each state's Heating Degree Days, average propane price, and estimated annual propane cost for a standard full-home setup (80K BTU furnace, 40-gallon water heater, cooking range, and clothes dryer).

Heating Efficiency Tips for Zone 1

In Zone 1, propane heating is minimal, so focus on water heating efficiency and outdoor appliance management. A tankless water heater eliminates standby losses. Pool covers reduce pool heater propane consumption by 50-70%. Use timers on spa heaters to avoid heating when not in use.

Insulation Requirements for Zone 1

Zone 1 building codes require minimal insulation (R-13 walls, R-30 ceiling) since cooling is the primary concern. For the occasional cool night, a well-sealed building envelope retains heat from cooking, appliances, and occupants without needing a furnace.

Propane Consumption Patterns in Zone 1

Homes in Zone 1 experience relatively flat propane consumption throughout the year since heating is a minor component. Water heating, cooking, and outdoor appliances drive consistent year-round usage. Pool and spa heaters, if present, may actually increase propane consumption during the swimming season (spring through fall), creating an inverted seasonal pattern compared to northern zones. Delivery scheduling is straightforward with 1-3 fills per year depending on total consumption.

For accurate estimates tailored to your specific state within Zone 1, visit the state pages or use the interactive calculator with your state selected for climate-adjusted results. You can also browse our setup scenarios to find a configuration that matches your home's propane appliance mix.

Other Climate Zones