TIP No. 22 : BEWARE IN SELECTION OF HEAT PUMP DIMENSIONS ……. YOU NEED A COAXIAL CONDENSER AS THE ONLY RETROFIT DESIGN SUITABLE FOR “SELF-FUNDING” DURABILITY & RESILIENCE ……..

When moving parts CAN break-down; they WILL break-down…sooner or later. When correctly designed this must NEVER require a “Return to Factory”. The “Lowest Life Cycle Cost (LCC)” involves a monobloc ASHP (water-cooled chiller life-span normally at 20-30 years & HMRC NAV amortization @ <6years) to be designed with a larger “footprint” for an overall larger “Enclosure volume” than a standard “compact”designed, residential H.P. This facilitates, the on-site, Lift-in/Lift-out of modular Condensers/Compressors/Fans/UV-C to “Future-Proof” & give “Resilience” for the periodic “state-of-the-art” upgrades in refrigerant specifications; ERV technology and regulatory pandemic H & S protections.

Similarly, each such “ASHP footprint” needs a larger surrounding space allocation for a “bulky” Service technician to perform any component “Lift-outs” in addition to ample clearance around each internal H.P. component. In particular, we give focus to the Condenser, where our years of field expertise, always favours the design longevity for a Coaxial, Double-Walled, Open-Vented Condenser versus the compact Plate Heat Exchanger Design. The Coaxial becomes heavier & bulkier, by requiring larger thermal design oversizing to deliver “instant” set-point hydronic discharge (unless fitted with Head Pressure Controls for a Low Lift Delta T closed circuit L.T. Central Heating).

This (DW-OV) Coaxial Condenser is the ONLY design for long-term, (x2–x300% more robust durability of Plate Condensers) at Lowest Maintenance costs & LCC. It eliminates the long-term problems of fouling & scaling plus the expensive eventual leakage of gasket seals & brazing of Plate Condensers. Coaxial Designs in stainless or titanium steel can be used with full regulatory Approval for potable water even when the ASHP or WWHP “heat source” is brackish pond or seawater.

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