No they don't. Spaceships don't have internal heating when the engine isn't running. There isn't an option for a separate gas or electric heating device. If you would like to add extra warmth during colder South Island winter nights then please add a Winter Warmer Pack.
Your Spaceship will keep you warm, even in winter. Our campervans are based on a car model (Toyota Estima). They have better insulation than a campervan that is based on a cargo van model.
And we have various optional accessories to keep you warm in winter and cool in summer.