Standard duct locations may not always give you full heating and cooling coverage throughout your new home - ensure that you check that all bedrooms, living areas and bathrooms have ducts. Most standard heating and cooling units have the capacity to support additional ducts without upgrading the unit; your new home sales consultant can provide pricing for the installation of additional ducts and confirm that your standard unit has adequate capacity.
Consider installing an additional heating/cooling controller if you're building a double storey home. Having controllers located on both the ground floor and first floor will allow you to switch units on and off or adjust the temperature without walking downstairs. The cost of installing dual controllers will vary depending on your heating and cooling system.
A ducted reverse cycle air conditioning system will cool your home in summer and provide heating in the cooler months. Ducted reverse cycle systems are expensive to set up and larger double storey homes may need larger units that require 3 phase power. Reverse cycle air conditioning units are more effective than evaporative systems in humid weather and a ducted reverse cycle system usually only has a single outdoor unit.
Evaporative cooling reduces the inside temperature of your home by pumping the hot and dry outside air through wet cooling pads situated inside the roof unit. Evaporative cooling can be cheaper to buy and run compared with refrigerated units however evaporative cooling isn't effective in humid weather.
Much like ducted reverse cycle systems, split system air conditioning will cool and heat your home and is more effective than evaporative systems in humid weather. Because split system units usually only cover a single room, multiple outdoor units are often required to provide heating and cooling to multiple rooms. These outdoor units can be unsightly and take up valuable space.
A zoned heating and cooling system will give you better control over which individual zones (rooms) should be operating or set to a controlled temperature. A dual zone heating and cooling upgrade will allow living areas and bedrooms to be programmed differently. Turning off zones when they're not in use will make your home more energy efficient and save you money. Some heating and cooling units will support up to eight individual zones, however upgrading beyond dual zones can get expensive.