# Heat recovery unit SpiroFlex VENT CLEAR HD4 HE Comfort — horizontal, 450 m³/h

**URL:** https://aio.lv/en/product--spiroflex-sx-rhd4hec--11833425
**Data updated:** 2026-03-09 14:45 (EET)
**Category:** Air purifiers
**Manufacturer:** SpiroFlex
**Manufacturer code:** SX-RHD4HEC
**EAN:** 5903661104870
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 2 505.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 2 070.65 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--spiroflex-sx-rhd4hec--11833425

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

Horizontal heat recovery unit SpiroFlex VENT CLEAR HD4 HE Comfort with a nominal airflow of 450 m³/h. Designed for balanced ventilation and heat recovery in residential or small commercial spaces, it recovers warmth from exhaust air to preheat incoming fresh air. Key features include horizontal installation orientation, heat exchanger with high efficiency (HE) designation, and suitability for continuous mechanical ventilation systems.

## Long description

SpiroFlex VENT CLEAR HD4 HE Comfort is a horizontal heat recovery unit with a nominal airflow of 450 m³/h designed for balanced mechanical ventilation in residential and small commercial spaces. The unit transfers thermal energy from exhaust air to incoming fresh air through a high-efficiency heat exchanger, reducing heating demand while maintaining continuous ventilation. Its horizontal orientation and compact design suit installations where ceiling or wall mounting in a horizontal duct run is preferred.
Advantages
The heat exchanger with HE designation provides effective sensible heat recovery, improving energy efficiency and reducing heating costs. The unit supports continuous operation and balanced airflow, which helps maintain indoor air quality and comfort. Designed for horizontal installation, the unit integrates into standard ductwork layouts and accommodates common ventilation connections. Construction materials and airflow capacity are selected to match typical residential and small commercial requirements.
Suitable for
Balanced ventilation systems in single-family homes and apartments
Small offices, clinics, and commercial premises with continuous ventilation needs
Retrofit projects where horizontal duct routing is available
Environments requiring steady airflow around 450 m³/h
Key specifications
Nominal airflow: 450 m³/h
Orientation: horizontal installation
Heat recovery: high-efficiency sensible heat exchanger
Application: continuous mechanical ventilation for residential and small commercial spaces
How to use
Install the unit in a horizontal position according to local building codes and ventilation design, connecting supply and exhaust ducts to the appropriate spigots. Ensure access for service and filter replacement. Commission the ventilation system by adjusting fan speeds, balancing supply and extract airflow to achieve the intended ventilation rate. Integrate controls and bypass or frost protection as required by the local climate and system design. Follow manufacturer instructions for electrical connections and safety clearances.
Usage recommendations
For reliable operation and optimal heat recovery, perform regular maintenance including filter checks and scheduled cleaning of accessible components. Verify airflow balance after installation and after any ductwork changes. In cold climates use appropriate frost protection strategies and consult installation guidance for bypass settings or preheating measures.

## Specifications

### Power

| Feature | Value |
|---|---|
| Energy efficiency class | A |

## FAQ

### How much does the Heat recovery unit SpiroFlex VENT CLEAR HD4 HE Comfort cost, and is it available for purchase?

The price is 2,505.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 07.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Heat recovery unit SpiroFlex VENT CLEAR HD4 HE Comfort be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All SpiroFlex products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized SpiroFlex service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for Heat recovery unit SpiroFlex VENT CLEAR HD4 HE Comfort?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/11833425/67233940_large.webp