A-7/W35: efficiency at -7 °C outdoor air and 35 °C flow.
iGarden Tools
Heat pump check
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A clear indication in 2 minutes
Which heat pump suits your home?
Answer a few simple questions. You will immediately see which iGarden model is likely to suit your home, including capacity, COP and practical domestic hot water options.
- ✓ No contact details required
- ✓ Instant result
- ✓ Based on official operating points
Step 1 · Starting point
Which information would you like to use?
Choose the information you have. A home quick scan is easiest for most people; gas consumption or a known design heat loss provides additional guidance.
m³/year
Good to know
This method assumes 80% for space heating, 90% boiler efficiency and 2,000 full-load hours. The result therefore has a deliberately broad uncertainty range.
kW
The most accurate method
We only add a 5% selection margin and then check the outcome against the property details you entered.
Step 2 · Your home
Tell us briefly about your home
These characteristics determine the home quick scan and provide a useful plausibility check for the other methods.
m²
Comparison point: -7 °C
For this quick check we use -7 °C as a consistent comparison point and compare the models at A-7/W35.
Step 3 · Heat emitters
How is heat distributed in your home?
The insulation level determines how much heat your home needs. The COP belongs to the heat pump at a fixed operating point. Your emitter system then determines whether a 35 °C flow temperature is realistic for your home.
Step 4 · Comfort
Would you also like domestic hot water?
If required, we add a simple domestic hot water tank indication. This does not change the required space-heating capacity.
Do not worry: this will not block your recommendation.
Your personal estimate
This is likely to suit you best
You first receive the key technical information. You can then have your situation checked by an iGarden Certified Partner with no obligation.
Strong preliminary match
iGXC11T
This model covers the calculated heating demand at -7 °C and a 35 °C flow temperature.
Calculated heating demand7.3 kW
Capacity A-7/W3511.38 kW
A7/W35: efficiency at +7 °C outdoor air and 35 °C flow.
The range depends on the selected calculation method.
COP and insulation are two different things
The displayed COP is the fixed unit performance at A-7/W35 or A7/W35. Better insulation reduces the heating demand and electricity consumption, but does not change this COP value. If a home requires a flow temperature above 35 °C, the actual COP will generally be lower.
Practical installation options
This is an indicative preselection. The final choice requires checks of the heat loss, emitter system, hydraulics and electrical connection.
COP is a unit value at a specific test point: at a COP of 3.23, 1 kWh of electricity delivers 3.23 kWh of heat under those conditions. Insulation determines the amount of heat required, not this fixed COP. Actual seasonal efficiency also depends on the weather, required flow temperature, controls, domestic hot water and installation quality.
Optional next step
Let Hewa select your iGarden Certified Partner
Your technical result is already included. Hewa checks the enquiry and sends it only to one affiliated iGarden Certified Partner suited to your region and project.