Air source heat pumps: costs, savings and benefits

There are two main types: monobloc and split systems. 

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• A monobloc system has all the components in a single outdoor unit. Pipes carry water to the central heating system and a hot water cylinder inside your home. 
• A split system separates the heat pump into indoor and outdoor units. 

Monobloc systems tend to be more common because they’re cheaper and quicker to install. They don’t take up as much space inside your home, but they’re slightly less efficient than split systems.

Split systems can be more efficient because some of the heat transfer takes place inside the building where it’s warmer, resulting in less heat being lost. 

A standard air source heat pump doesn’t provide hot water on demand like a combi boiler. So, when you’re thinking about your heating options, you’ll need a way of storing hot water for when you need it: 

Hot water cylinders 

The size of hot water cylinder depends on the amount of hot water your household typically uses. They can usually fit inside any cupboard that measures at least 80cm x 80cm. 

Other options 

If you don’t have space for a hot water cylinder, you still have options. For example, some hybrid heat pump systems have the heat pump providing heating and a boiler providing hot water on demand. 

Want more information on Monobloc Heat Pump? Feel free to contact us.

You could also consider installing a heat battery, which takes up less space than a hot water cylinder. 

Instantaneous hot water heaters are also available. You can install these under your kitchen sink to provide a smaller amount of hot water. 

You’ll need somewhere outside your home where a unit can fit to a wall or on the ground. It must have some space around it to allow a good flow of air. 

If you’re not limited by space inside your home, it may be worth the extra cost of installing a split system. Your installer should be able to talk you through your options and help you choose the design that works best for you. 

Compact heat pumps are specifically designed to heat small, well-insulated modern flats and homes. These only need a cupboard with around 80cm x 80cm floor space in the flat, and this should be near an exterior wall. 

Another potential option is an air-to-air heat pump. These are more often used to heat smaller properties such as park homes or flats. Other solutions are only suitable if you’re in a flat with shared services where each flat has access to communal heating. 

ATW Configurations Cost Analysis

Air to Water Heat Pump can be used to provide either Chilled Water or Hot Water and Pre-Heated DHW or Chilled Water and Hot Water and Pre-Heated DHW. In both cases price difference is driven by machine, glycol, pump and manpower individual prices.

The above schematics depict the 2 most common installations of Air to Water Heat Pumps. The one on the left is for places where simultaneous Cooling / Heating is rare, so one tank with indirect coil is used to preheat DHW to temperatures as high as 130°F (or 55°C) and the other tank is used for either space heating or space cooling. In the schematic on the right, One indirect tank is used for DHW pre-heating and space heating and the other tank is dedicated for chilled water. 

When Heat Pump are used to serve largely Fenestrated Properties with a South and North Exposures, area beside the southern façade could have a cooling demand (even in mid-winter temperatures) and area beside the northern façade will have a heating demand.

For more information, please visit Split System Water Heater Supplier.

CONCLUSION