HRV ERV Size Calculator
Size a heat or energy recovery ventilator from house area and ventilation needs.
Compare Your Options And Get Clear Answers
Size a heat or energy recovery ventilator from house area and ventilation needs.
HRV ERV Size Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Results update as you change the inputs.
Review
Read the breakdown and the explanation.
Adjust
Change values to compare scenarios.
HRV Quick Guide
Typical values for reference.
| Area m2 | Height | ACH | Flow |
|---|---|---|---|
| 140 | 2.5 | 0.35 | 122 m3/h |
| 80 | 2.4 | 0.35 | 67 m3/h |
| 250 | 2.7 | 0.5 | 338 m3/h |
| 60 | 2.4 | 0.3 | 43 m3/h |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
HRV ERV Size Calculator FAQ
Answers to common questions about this calculator.
It uses the formula shown with your inputs. Real prices and rules vary, so treat it as a guide.
Flow = volume x ACH.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.
Yes. Replace each input with your own figures and the result updates instantly.