Home Comfort Explorer
See how a home's size, airtightness and the way people live shape comfort, air quality and moisture — and where ventilation makes the difference. Built for builders and designers to explain it, and for homeowners to explore it.
Built to be explained, not engineered
Most sales consultants can comfortably explain stone benchtops, double glazing, solar, batteries and insulation. But ask “why does this home need MVHR?” and many struggle — not because ventilation doesn’t matter, but because it’s rarely taught in plain language.
Instead of asking your team to design a system, this tool starts where they’re strongest: the client and their home. Answer a few simple questions and it turns the result into a story — and the exact words to use.
What kind of home is your client building?
Set the scenario below to generate talking points tailored to your client.
Start with a preset
Optional starting points. Choose one, then adjust the details below.
Preset loaded: Typical
Adjust the home details
These inputs update the results instantly.
The one thing to remember
This home relies on opening windows for ventilation.
Overall riskSevere
Likely overnight CO₂2,200 ppm
Daily moisture load17 L
Without:Stale bedrooms, Moisture build-up, Reliance on opening windows
With MVHR:Fresh air automatically, Continuous moisture removal, Filtered outdoor air
This home is likely to experience
- Bedrooms may exceed 2,200 ppm overnight
- Approximately 17 litres of moisture are added to the air each day
- Fresh air depends on occupant behaviour
- Heating and cooling energy is lost whenever the home is aired
With balanced MVHR
- ✓Fresh, filtered air is delivered automatically
- ✓Moisture is removed continuously
- ✓Ventilation works regardless of occupant behaviour
- ✓More heating and cooling energy is retained
Without designed ventilation
Fresh air depends on…
- ☐remembering to open windows
- ☐the weather cooperating
- ☐tolerating outdoor noise
- ☐letting in smoke and pollen
With balanced MVHR
Fresh air depends on…
- ✓the system running normally
That consistency, not any single number, is what MVHR really delivers.
Compare the options
Same home, three ways of handling the air. Greener is better.
No designed ventilation
Home as built
Window airing + fans
Depends on weather & habits
Balanced MVHR
Continuous, filtered
MVHR does not create heat. It keeps more of the heating or cooling energy you’ve already paid for. Shown for typical winter conditions, for client education only.
Why it happens
Across the seasons
Window airing only improves the air when the weather is mild. MVHR doesn’t depend on the weather at all.
Window airing
1,695 ppm
in winter
1,316 ppm
in summer
Balanced MVHR
780 ppm
the same fresh air, every season
Daily moisture load
How much water vapour this household adds to the air each day.
17 L/day
≈ 17 × 1 L bottles
Cooking, showers, breathing, drying towels and normal occupancy can release this much water vapour into the home each day, about 17 one-litre bottles, or roughly 1.7 buckets of water.
Moisture doesn’t disappear on its own. It must either leave the building through ventilation or condense somewhere inside the home.
A note on bushfire smoke
MVHR’s real benefit on a smoke day is that ventilation can continue while the windows stay closed, and the incoming air is filtered, generally better than opening up. It does not eliminate smoke: standard filters reduce particles but aren’t dedicated smoke filters, so some fine particles and odour can still enter. Higher-efficiency filters improve smoke performance, but they add resistance and can reduce airflow if the system isn’t designed for them. They’re best fitted for smoke events rather than run year-round, and aren’t a permanent HEPA solution.
Talking points
For each issue: what the client feels, what you can say, and what MVHR changes.
When your client asks…
Tap a question to reveal a plain-English answer.
These figures are indicative and designed for client education — they are not a ventilation design, airflow schedule or commissioning target. HiPer Haus sizes and commissions each MVHR system separately for the actual home. MVHR improves indoor air quality, manages moisture and supplies filtered fresh air, but it does not remove all moisture, guarantee a specific humidity level, or completely stop bushfire smoke. Model assumptions: ≈18 L/h CO₂ per sleeping adult, home volume = floor area × 2.4 m, natural air change ≈ ACH50 ÷ 20, ≈2.7 L/day moisture per occupant plus a wet-area and overnight allowance.
What problem are we solving?
Clients don’t buy features — they buy solutions to problems they recognise. Start here, not with the spec sheet.
Stuffy bedrooms
Why it happens
Two sleeping adults in a closed, well-sealed bedroom can push CO₂ well past 2,000 ppm by morning. There's nowhere for the stale air to go.
How MVHR helps
MVHR supplies a steady stream of fresh, filtered air to every bedroom overnight, so the room feels fresh at 6am — not stuffy.
Condensation
Why it happens
Everyday living adds litres of moisture to the air. In a sealed home that moisture builds up and settles on the coldest surfaces — usually windows and reveals.
How MVHR helps
By continuously removing humid air before it accumulates, MVHR keeps indoor humidity in a healthy range, so windows stay clear.
Mould
Why it happens
Mould needs moisture. Persistent high humidity and condensation give it everything it needs to grow in wardrobes, corners and behind furniture.
How MVHR helps
Controlling humidity at the source removes the conditions mould needs — protecting both the building and the occupants' health.
Bushfire smoke
Why it happens
On smoke-affected days, opening windows is not an option — but a sealed home with no ventilation becomes stuffy fast.
How MVHR helps
MVHR lets the home stay sealed while still delivering fresh, filtered air, so the family breathes comfortably with the windows shut.
Allergies & pollen
Why it happens
Open windows bring in pollen and dust along with fresh air — a daily problem for hay fever and asthma sufferers.
How MVHR helps
Incoming air is filtered before it reaches the home, so occupants get fresh air without the allergens that come with an open window.
Energy loss
Why it happens
Ventilating by opening windows throws away the heating and cooling you've paid for — and sealed homes with no ventilation trap stale air instead.
How MVHR helps
Heat recovery transfers most of the warmth (or coolth) from outgoing air into the incoming fresh air, so the home breathes without the energy penalty.
Don’t say this — say this
A living reference for turning technical language into words a client actually feels.
Don’t say
The system provides balanced ventilation.
Say this
The home gets fresh, filtered air all day — without relying on open windows.
Don’t say
It extracts stale air from wet areas.
Say this
It continuously removes moisture before it becomes condensation or mould.
Don’t say
Heat recovery efficiency is 90%.
Say this
You get fresh air without throwing away the heating and cooling you paid for.
Don’t say
It maintains optimal indoor air quality parameters.
Say this
The air in here stays as fresh as a window just opened — all day, every day.
Don’t say
Supply and extract are commissioned to design airflows.
Say this
We tune every system to your home so each room gets exactly the right amount of fresh air.
Need help explaining ventilation?
HiPer Haus can support your team directly — from display-home sales training and client presentations to design-stage input and project-specific advice.