Solar HVAC Design

Image of all-electric house design featuring solar power, all-electric heating, cooling and ventilation.

Consider the following in developing your solar HVAC design:

  • Thermal performance of your house
  • Amount of solar power you can produce
  • Your preferences around heating and cooling methods
  • Heat recovery ventilation
  • Resale value
  • Your project budget 

All-electric House Design

Take a holistic approach to the solar HVAC design for your all-electric house.

Let Hydrosol assist with your heating, ventilation and cooling design to maximize the benefit from your solar power. Consider also the thermal performance of your house.

For solar HVAC and water heating designs to work effectively with your solar power, your house needs to be energy efficient.

Undertake an indicative thermal performance assessment (Star Rating) as soon as possible in the design process. The initial result may cause you to revise your building design.

Thermal Performance Design

Seek advice on how best to achieve the minimum 6 Star thermal performance rating required. Consider these important factors because they affect your thermal performance assessment significantly:

  • Location climate (whether your house is being designed mainly for heating or cooling)
  • House orientation to the sun and prevailing wind
  • Shading in winter and summer
  • The internal mass of your house
  • The amount and type of windows, frames and glazing
  • Insulation of ceilings, walls and floors
  • Thermal bridging
  • Air tightness
  • Ceiling fans
Schematic showing an underfloor hydronic heating and cooling system with a heat pump.
Underfloor Hydronic Heating and Cooling System with a heat pump

Hydronic Heat Pumps and Air Conditioning

Consider whether a hydronic heat pump and/or air conditioning is better for your solar HVAC design.

If your house is well sealed, you may require heat recovery ventilation as well.

Hydronic heat pumps are a good option for southern or inland Australian locations with cool winters and low humidity. This is where heating is required more than cooling. Heat pumps can be powered by your solar power and run in reverse for hydronic cooling.

Air Conditioning

Air conditioning is a better option for northern Australian locations where cooling is needed more than heating and humidity is an issue. Air conditioners can also be powered by your solar power and run in reverse for hydronic cooling.

A combination of heat pumps and air conditioners can make good sense, paticularly for two storey dwellings in southern locations.

Click to read more: Which Air Conditioning System is Best for me?

Schematic of Ducted Air Conditioning system.
Ducted Air Conditioning System
Hydrosol image of solar panel installation for solar power case study
Roof Top Solar Panel Installation

Solar Power

Look at adding solar panels if your roof has unshaded sunlight and you can orient solar panels to the north, west or east.

Heat pumps are ideal with solar power because they typically deliver heating or cooling 4 or 5 times greater than their power they use.  Incorporate high internal building mass into your building design. This allows heating or cooling generated during the day using your solar power to be stored for release during the evening.

Your heat pumps and air conditioners can largely be run from your own solar power if you have good home design.

Click to read more: Managing Your Solar Power

Energy Recovery Ventilation

Explore adding heat recovery ventilation (HRV) if your home is designed to a high energy efficiency standard.

New builds and renovations with 6+ Energy Rating are well insulated and well sealed. This makes a strong case for adding HRV ventilation to keep your home feeling fresh and airy without opening windows.

Hydrosol Image of Stiebel Eltron Decentralised Heat Recovery Ventilation (HRV) System showing Indoor Facia Panel
Stiebel Eltron Decentralised HRV Ventilation system showing indoor facia panel
Image of off-grid solar panel installation maximizing roof space and orientation

Off-grid Homes

You need to consider more carefully your heating, cooling and water heating needs if you have an off-grid home. This is because heating, cooling and water heating represent about 70% of your home’s energy needs.

If you have plenty of wood available, then you may want to use that for heating. However, heat pumps can provide a reliable back up for wood heating. They will standby and automatically switch on to add to the heating load as required then switch off. Also, their reverse cooling ability provides very efficient and low cost cooling in summer, particularly if you run them with ceiling fans on.

Pool and Spa Heating

Consider a heat pump for heating your pool or spa. They do not take up roof space that could otherwise be used for solar panels. Also, they can extract heat from the air even when it’s cold, raining or dark. They are ideal for heating during shoulder seasons to extend your swimming season.

Click to read more: Astral Pool and Spa Heat Pumps

Your hydronic heat pump may be suitable for heating your pool or spa if your water volume is less than 30,000 litres. Your hydronic heat pump will need a suitable heat exchanger to separate the corrosive pool water from your hydronic heat pump.

Click to read more: Elecro Pool Heat Exchangers

If your pool is larger than 30,000 litres, then a dedicated pool heat pump will be more appropriate.

Hydrosol image of Stiebel Eltron 14kW model WPL25ACS hydronic heat pump installation

Explore your needs

Explore your needs before moving to a draft design. Then a final design and installation plan will be developed for your build. See our process map below.

Send us information about your project, your preferences and your building plans. We will be happy to review this and provide an indicative quote. We can also make a referral to G-Store to look at your solar power requirement. These are complimentary services we offer.

Quick Quote

Use our Quick Quote configurator. This will give you a ballpark idea of the cost of supply and installation of a quality system. Contact us to explore different approaches that can vary this pricing.

Consulting Service

Contact us to look at your specific project needs. Our consulting service involves the following:

  • Review of your building plans and preferences
  • Review of your heat load
  • Discussion
  • Recommendations and Indicative Quote
  • Contractor referral

The referral includes your Indicative Quote to be used as the basis for your Final Quote.

Our Design Process

Solar HVAC Process Step 1 is to identify the issues and preferences for a cost effective all-electric heating and cooling system or systems.
Step 1 Identification

Understanding your needs

We know that every client and project is different so we start by understanding your needs, priorities and vision for your build. 

We then develop an indicative supply and installation quote to consider taking account of your preferences, budget, building design, site issues and timing.

Solar HVAC Process step 2 is to design a cost effective all-electric heating and cooling system or systems based upon the information from the identifcation step 1.
Step 2 Design


The design stage looks at equipment specification as well as outdoor and indoor equipment siting or layout.

Your power supply including solar power is part of your whole electric heating and cooling solution.

Solar HVAC Process Step 3 is to select, order and deliver the products for the design created in Step 2.
Step 3 Product Selection


We only recommend the best heating, cooling and ventilation products available.

We want you to be very happy with your system so we only use quality equipment with proven reliability, local Australian support and good product warranties. 

Solar HVAC Process Step 4 is to install the products ordered and delivered in Step 3.
Step 4 Installation


We work with the best and most experienced installers. The installation process starts at the beginning of the build with project planning and design work, followed by the rough-in of plumbing pipes and electrical cables. Towards the end of the build, equipment is installed and connected to power and plumbing.

Solar HVAC Process Step 5 is to commission the all-electric heating and cooling system or systems.
Step 5 Commissioning


Once everything has been installed, your system is tuned and  commissioned.

If available, your system will be connected to your home WIFI. This enables control and monitoring through your electronic devices.

Solar HVAC Process Step 6 is to finalise the project and establish a maintenance plan going forward.
Step 6 After Sales Support

After Sales Support

We recognise that you have made a significant investment in heating, cooling, ventilation and/or water heating and that you want your system/s to function optimally for many years.

Our equipment suppliers are all leading companies with service desks for support. They will be happy to deal with any warranty issues.

Consider a service plan with your installer to ensure optimal performance of your system/s.