Hexonic B45 pool tubular heat exchanger, up to 15 m³, PN 16
- Application: pool water heating (chlorinated water)
- Heat capacity: 6–26 kW (heat source T 40–90 °C, pool T 20 °C)
- Recommended pool volume: up to 15 m³
- Material: stainless steel (shell and tubes)
Where B45 is used
B45 is chosen for private pool heating systems up to 15 m³ — typically medium-sized outdoor or indoor pools, hot tub (SPA) side circuits, small indoor pools and low-capacity solar systems. The heat source side connects to the boiler / heat pump circuit; the pool water side — after the filter, before returning water to the pool. The straight corrugated tube design delivers turbulent flow at low pressure loss and provides a self-cleaning effect against fouling.
Technical specifications
| Parameter | Value |
|---|---|
| Code | 0170-0001 |
| Series / Model | Hexonic B / B45 |
| Construction | Shell-and-tube, single pass, corrugated tubes |
| Heat capacity | 6–26 kW (per heat source T) |
| Recommended pool volume | up to 15 m³ |
| Connection — heat source (K1, K4) | G¾" internal thread |
| Connection — pool water (K2, K3) | G1" internal thread |
| Max. pressure (PN) | 16 bar |
| Max. working temperature | 165 °C |
| Heat exchange area | 0.1 m² |
| Tube diameter | 8 mm |
| Dimensions (A × B × C, ØDz) | 122 × 75 × 289.5 mm; Ø80 mm |
| Weight | ~2.1 kg |
| Material | Stainless steel |
| Media | Chlorinated pool water, potable water, glycol on heat source side |
Pool heat-up time — quick calculation
Exchanger capacity: P = Q × ΔT × 1.163 (kW). Pool heat-up time: τ = V × ρ × Cp × ΔT / P, where V — pool volume (m³), ρ ≈ 1000 kg/m³, Cp ≈ 4.186 kJ/(kg·K).
Example: 15 m³ pool, +5 °C rise, with B45 running at ~18 kW (heat source 70 °C) → E = 15,000 × 4.186 × 5 = 314 MJ ≈ 87 kWh; τ ≈ 87 / 18 ≈ 4.8 h.
When to choose B45
- Private pools up to 15 m³ (typical 3 × 5 m surface, 1.2 m depth)
- Hot tubs / SPA pools (higher temperature regimes)
- Heat source: gas / solid-fuel boiler, heat pump (air-water / ground-water), solar collectors, district heating substation
- Chlorinated water (not salt electrolysis)
B2B delivery and logistics via Amegata.lt
- 24-hour delivery across Lithuania (from our warehouse in Vilnius)
- Competitive B2B pricing — often below market average
- 30-day payment terms for companies (per contract)
- Free technical consultation for pool heat exchanger sizing
Official Hexonic catalogue: hexonic.com/Pool catalog (PDF)
Frequently asked questions
Why B45 for chlorinated water only, not salt electrolysis?
Stainless steel resists low chlorine levels (up to ~1 ppm), but in salt-electrolysis pools (5–7 g/l NaCl) the chloride concentration causes stress corrosion cracking. For those systems, choose the Hexonic TI series (titanium tubes) — same capacity range, but salt-resistant.
How is the size selected by pool volume?
Rule of thumb: exchanger capacity should 3–5 times exceed daily pool heat losses. A 15 m³ pool with a cover typically requires 12–18 kW effective capacity — B45 fits with a 60–70 °C heat source. If the pool is uncovered or in colder climate — step up to B70 or B130.
Suitable for hot tubs (SPA)?
Yes — B45 is among the best choices for small SPA pools (1–5 m³). Higher pool temperature (38–40 °C) is reached quickly with B45 — typically 1.5–3 h from cold start.
Compatible with an air-water heat pump?
Yes, but note the heat pump output temperature: often no higher than 55 °C. Per the catalog, at 50 °C source B45 delivers ~10 kW — good for maintenance, but for fast heat-up choose B70 or B130.
What maintenance is required?
Welded construction without gaskets — no sealing element replacement needed. We recommend draining the tube side in winter (if the pool is not heated) and CIP flushing once per season if fouling signs appear (reduced heat transfer, higher Δp).
