Retrofitting a Home in Lower Hutt with Radiator Central Heating & High-Temperature Air-Water Heat Pump

Client’s Initial Concerns

The homeowner had previously invested in double glazing and insulation to improve thermal efficiency. However, they still experienced discomfort, particularly during the colder months. The insulation worked effectively to retain heat but also retained cold air when the house was not actively heated, making it difficult to maintain a comfortable indoor temperature. The client had experimented with air-to-air heat pumps and electric column heaters, but found these solutions to be inconsistent, creating uneven warmth and a drafty environment.

Additionally, the home’s existing hot water system relied on an electric element-heated cylinder, which proved costly to run. With energy prices rising, the homeowner was eager for a more cost-effective and efficient solution.

The Solution: Radiator Central Heating & High-Temperature Air-Water Heat Pump

To address these concerns, Job Flow Heating Wellington proposed and installed a radiator-based central heating system powered by a high-temperature air-to-water heat pump. This solution offered several key benefits:

1. Consistent and Even Heating: The radiator system provided steady, radiant heat throughout the home, eliminating the drafts and uneven warmth caused by air-to-air heat pumps and standalone electric heaters.
2. Energy Efficiency & Cost Savings: By integrating the high-temperature air-to-water heat pump, the system significantly reduced electricity consumption. The heat pump efficiently extracts ambient heat from the air, using it to warm both the central heating system and domestic hot water.
3. Reliable Hot Water Supply: The new system replaced the existing electric element-based hot water cylinder, leading to notable reductions in energy costs while ensuring a consistent and ample hot water supply.
4. Enhanced Comfort: Unlike air-based systems, which often create dry air or fluctuating temperatures, the radiator system delivered comfortable, steady warmth without forced air circulation, improving overall indoor comfort.

Results & Client Satisfaction

Following the installation, the homeowner reported a dramatic improvement in their living conditions. The home maintained a steady, comfortable temperature throughout the winter, with no drafts or cold spots. Additionally, the operational costs for both heating and hot water decreased significantly due to the efficiency of the air-to-water heat pump.

By implementing this tailored heating solution, Job Flow Heating Wellington successfully transformed the home into a warm, energy-efficient, and cost-effective living space. The project stands as a testament to the effectiveness of high-quality central heating solutions in New Zealand’s climate, particularly when combined with prior insulation and double-glazing efforts.