Retrofitting heat recovery into an existing building is different from designing new. Space, duct layout, and control integration usually drive the choice more than peak efficiency.
Step 1: Audit the Air Streams
- Confirm there is a dedicated exhaust and a matching supply.
- Measure airflow (m³/h or CFM) and temperature profiles.
- Note operating hours — recovery only pays where runtime is high.
Step 2: Pick a Form Factor
| Constraint | 最適 |
|---|---|
| Exhaust far from supply | ランアラウンドコイル |
| No cross-contamination allowed | Plate or heat pipe |
| Humidity control needed | エンタルピーウィール |
| Tight mechanical room | Heat pipe (compact) |
Step 3: Integrate Controls
- Add a bypass for mild-weather free cooling.
- Interlock with existing BMS via dry contacts or BACnet.
- Use variable-speed fans to follow load.
Step 4: Verify Savings
Before commissioning, baseline energy use. After 3–6 months, compare to confirm payback matches the model.
A retrofit succeeds on planning and verification as much as hardware. Phase the work to avoid shutting down occupied spaces, and confirm the existing duct static pressure before sizing any core so you do not inherit a high-pressure-drop system. Where the exhaust and supply are far apart, a run-around coil keeps the retrofit feasible without re-ducting. Use a measurement and verification plan based on a recognized protocol so the reported savings survive audit: baseline energy, then compare after a full season. Tie the recovery to the existing controls through dry contacts or a network link so it runs only when needed. Our psychrometric guide shows how recovery shifts the air state on the chart.
よくある質問
Do I need to replace the AHU?
Usually not. Add-on cores or remote run-around coils can be fitted around existing equipment.
What is the biggest retrofit risk?
Undersized ducts causing high pressure drop; verify static pressure before specifying.
よくある質問
Do I need to replace the AHU?
Usually not. Add-on cores or remote run-around coils can be fitted around existing equipment.
What is the biggest retrofit risk?
Undersized ducts causing high pressure drop; verify static pressure before specifying.
適切な熱交換器を選定
当社のエンジニアが風量、温度、圧力損失の予算に合わせてコアを設計し、用途に応じて板式・回転式・ヒートパイプ回収を選定します。以下をお読みください： 熱交換器ガイド 、または仕様についてお問い合わせください。
関連製品
HVAC および換気向けの板式・回転式・ヒートパイプ回収。
空気と液体用の大表面積固定コア。
大風量向け高効率エネルギー回収。
清浄用途向けの受動的・完全分離流。