Day: October 28, 2024

Hydrosol image of a multi-split air conditioning system

Air conditioning systems

Choose air conditioning systems that work best with your home design, preferences, and budget. Air conditioning systems are efficient air-to-air heat pumps that convert each 1kW of power into about 4 kW of heating or cooling. Consider a split system for a single room, multi split and ducted systems for multiple rooms.

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Image of a solar power inverter and switchboard

Power for your electric home

Consider power for your electric home at the design stage. Removing gas as an energy source will put more load onto your power supply. Therefore, your home must be energy efficient and have energy efficient appliances. Also, this is required by new 7-Star ‘Whole of Home’ building code, for renovations and new buildings.

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Collage of radiant heating systems

Underfloor heating and radiators

This BLOG explores options for electric underfloor heating, radiator panels and hydronic convectors. It includes hydronic and electric-resistance systems. It excludes reverse cycle air conditioners, which are a subject of their own and do not radiate heat. Hydronic systems are a lot more expensive to install but a lot cheaper to run and add greater capital value to your home. Electric resistance systems are much cheaper to install but a lot more expensive to run. These systems do not stir up dust, airborne pollen and other allergens. Therefore, they are better for people with breathing issues such as asthma. They can be installed as underfloor radiant systems, radiator panels or fan-coil convectors.

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Hydrosol project completion image

Heat Pump Testimonials

This BLOG lists some interesting electric heating and cooling projects, and testimonials. Hydrosol has been involved with many projects over the years involving many different aspects of electric heating, cooling, ventilation, domestic hot water and pool heating. Attention to reducing heating and cooling load is also an important consideration. Use our knowledge and experience to help develop a tailored approach that’s right for you.

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Example of an Galletti ART-U fan coil convector, which provides hydronic heating and effective cooling with chilled water below they dew point.

Heat pump hydronic cooling

The Galletti ART-U can coil convector provides hydronic cooling and heating with a heat pump. The ART-U convector is designed for cooling in summer using chilled water from a reverse cycle heat pump. An internal fan draws air through its coils. Condensation is drained away outside, which gives you latent cooling as well as sensible temperature cooling. In winter, hot water from the heat pump is circulated through the convector.

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Hydrosol image showing a timber covered slab absorbing sunshine radiation in winter, which will improve house heat loss.

Reduce house heat loss

This BLOG discusses the causes and suggests steps to improve your house heat loss in winter and heat gain in summer. The causes come broadly from 3 areas, about one third each: (1) ceilings, (2) windows and (3) walls, floors and general air leaks. Your choices on what do depend firstly on whether you are building a new house, renovating an existing house or improving the thermal performance of an existing house.

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Image to replace gas boiler with heat pump

Replace gas boiler with heat pump

Replace your gas boiler with a hydronic heat pump for efficient heating and a cooling option using your solar power. Benefits include lower operating costs, less greenhouse emissions, adding value to your home, and safer appliances with longer operating life. However, you should also work on improving the thermal performance of your home. Also, explore upgrading your power supply. This BLOG discusses the key points.

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Schematic showing the where air leaks from convection, which needs to be sealed to improve house heat loss.

Factors Affecting HVAC Design

Heating, Ventilation and Cooling (HVAC) Design starts with thinking through your needs. Good building design has low heating and cooling requirements. This enables all-electric solutions with energy efficient appliances such as inverter heat pumps and air conditioners. These appliances can be largely powered by solar panels. The thermal energy can be stored in the mass inside your home during the day and released at night.

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Image of Minitec underfloor heating coils laid over suspended floor

Underfloor heating and cooling on suspended floors

You can enjoy underfloor heating and cooling if you are renovating or building with suspended floors. Use a heat pump as the heat source to have reverse cycle cooling in summer as well. This will absorb heat from your home and expel it outside in reverse cycle mode. You can apply most types of floor coverings over your underfloor heating circuits including tiles timber boards and loose weave carpet.

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Hydrosol image of Stiebel Eltron buffer tanks, 100 and 1500 litre buffer tanks, larger tanks can be used as a thermal battery.

Heat pump thermal battery

Consider adding a larger heat pump buffer tank or thermal battery to increase the internal mass of your home for greater thermal storage. This will help moderate the extremes of your indoor temperatures, reduce your power consumption for heating and cooling and maximise your solar power during the day.

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Hydrosol image of solar panel installation for solar power case study

Manage Your Solar Power

Understanding the power demand of your home appliances, and timing some of them to run during the day when you are producing power, will reduce your power bills. This BLOG explores ways to reduce your power demand from the grid.

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Hydrosol Image of Stiebel Eltron Decentralised Heat Recovery Ventilation (HRV) System showing Indoor Facia Panel

Heat Recovery Ventilation

Reduce heat loss and running costs, and improve air quality with Heat Recovery Ventilation (HRV). This BLOG explores HRV and ERV ventilation systems. Homes built years ago were not designed for efficiency and so they leaked air everywhere. Modern homes with 6+ Star rating are much more air tight and require ventilation systems to keep a fresh feel inside without needing open windows in winter and summer. Air leaks and open windows can account for a quarter of your energy costs.

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Hydrosol image of underfloor hydronic circuits laid prior to the concrete screed layer with heat pump for heating and reverse cycle cooling.

Heat Pump Hydronic Heating

Heat pumps use water to transfer heat to your home in winter from the outside air and reverse this process in summer to keep your home cool. Water is 3300 times more capable of transferring heat than air so you don’t need large air ducts with heat pumps.

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Hydrosol image of underground power pit re home power upgrade for converting gas appliances to electric

Home Power Upgrade

Consider a home power upgrade if you plan to add new electrical appliances like heat pumps for heating, cooling, hot water, and pool heating, or electric vehicle charger, induction cooktop, etc. This BLOG explores approaches and pricing. Good power supply ensures that all your electrical appliances will run efficiently with longer life.

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Schematic of Montreal Protocol, Kigali HFC phase-down timeline

Heat Pump Refrigerants

Heat pump refrigerants have steadily evolved since 1987, when the Montreal Protocol set the objective of phasing out harmful refrigerants for the environment. All heat pump and air conditioning refrigerants have their pros and cons. Due to urgent action needed now to avoid catastrophic climate change, natural and man-made refrigerants with low GWP are becoming essential. This BLOG discusses man-made and natural refrigerants. The latter are gaining widespread support because of their environmental and performance benefits, which outweigh concerns about flammability (apart from CO2) that can be managed.

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Hydrosol image of a Cinier Greenor hydronic fan-coil convector heating & cooling installation in Melbourne Australia

Toorak all-electric house renovation

This all-electric house renovation in Toorak involved going off gas and replacing the old ducted air conditioning system with hydronic heating and cooling. Both form and function of the heating and cooling system were important for this project. New radiator panels, hydronic towel rails and fan-coil convectors were installed, powered by an electric heat pump.

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Visualisation of Cinier Greenor hydronic convector heating & cooling system

Cinier Greenor Designer Hydronic Convectors

The Greenor designer range of hydronic fan-coil convectors are manufactured by Cinier in France. They present a fusion of art and leading technology. Greenor convectors are designed for prominent locations in your home, to be admired whilst also providing gentle, silent heating and cooling. They make virtually no noise or air drafts from transferring heat by convection and radiation. The hot or chilled hydronic water flowing to these convectors is produced by electric air-to-water heat pumps.

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Schematic of Stiebel Eltron heat pump hydronic system with buffer tank

Heat Pump Buffer Tank

Do I need a buffer tank with a hydronic heat pump? Heat pump buffer tanks are recommended for heat pump hydronic systems for three key reasons:
1. Hydraulic separation for hydronic systems with heating and cooling
2. Prevent short cycling with insufficient water volume from room zoning
3. Additional thermal storage of heat produced by heat pumps using daytime solar power.

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Image of a Green Pool requiring chemical treatment

Fix Green Pool Water

Fix green pool water because it is likely caused by algae, which is dangerous to your family and friends and will harm your pool equipment. Green pool water is a visual clue that your pool water may be contaminated depending on the specific cause. It reflects significant growth of micro-organisms in your pool water. Swimming pools have restricted water volume and continually pick up micro-organisms that have nowhere to go. If left untreated, they will proliferate and turn your pool water green. Apart from algae, these micro-organisms also include bacteria, fungi and germs.

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Image of a large swimming pool with spa

Heat Pump Pool Heater

Extend your swimming season by heating your pool sustainably. This is achieved naturally from direct sunlight and also from heating systems. Due to concerns of global warming and the rising cost of gas, solar systems and electric heat pumps powered by solar panels have become increasingly popular. The main advantage of heat pump pool heating over a solar system is that it doesn’t take up roof space that can be otherwise used for solar panels, which generate power for other household needs apart from pool heating.

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Hydrosol image of ''Sustainability by greening Melbourne'' illustrating the idea that energy assessment identifies areas to better manage, and reduces energy costs

Energy assessment to reduce energy costs

An energy assessment identifies areas to better manage. It leads to a plan for better energy management that reduces energy costs. Do an energy assessment to help you understand, measure, verify and better manage your energy use. This is more important for a large house or commercial facility, where energy use is higher. If you can measure it, you can manage it!

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