Purchase two or three space heaters, and place one in the bedroom and bathroom. Space heaters can provide a great deal of heat to a small, enclosed space, and can save on energy costs because of their efficiency in comparison to a central heating system even at their lower settings.
Repair your chimney or fireplace. Many homes built in the 1920s relied on fireplaces to provide warmth for the home. Call a chimney repair company to have your fireplace and chimney inspected first for cracks or damage in the brickwork. You may have a bungalow with a chimney in working order, which can provide some warmth to the living area where the fireplace is by burning traditional split logs.
Install a wood-burning stove in the main living area. Wood stoves use heat from burning logs inside to heat up the cast iron stove, which then radiates heat into the surrounding area. These can give you bungalow a cozy, rustic feel, and are more efficient than traditional fireplaces.
Purchase a central heating system for the house. This option is costly, since you not only have to purchase new equipment, but also have to hire a heating and air technician to install it for you. However, this may be a better investment in the long view if you prefer the comfort of a fully climate-controlled home.
Consult with a geothermal heating company in your area. Geothermal heating and cooling systems may be expensive to install, but they can dramatically decrease your heating costs and are an environmentally friendly way to warm your home. These systems use heat generated by the Earth to warm water in pipes, which is then used to heat your home.