{"product_id":"airwise-awmav100s-metal-supply-air-valve-100mm-mvhr","title":"Airwise AWMAV100S Metal Supply Air Valve 100mm MVHR","description":"\u003c!-- SEO Product Name: Airwise AWMAV100S Metal Supply Air Valve 100mm MVHR --\u003e\n\u003cdiv style=\"font-size:16px;font-family:Arial,sans-serif;color:#222;max-width:900px;margin:0 auto;line-height:1.6;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eAirwise AWMAV100S\u003c\/strong\u003e is a \u003cstrong\u003e100mm diameter metal supply air valve\u003c\/strong\u003e for mechanical ventilation duct systems. Manufactured from \u003cstrong\u003egalvanised steel finished in RAL 9010 white\u003c\/strong\u003e, it provides the fresh air delivery terminal for \u003cstrong\u003eMVHR whole-house heat recovery, positive-input ventilation (PIV), and mechanical supply ventilation\u003c\/strong\u003e systems operating with a 100mm distribution connection. The \u003cstrong\u003eexverted (convex) adjustable central cone\u003c\/strong\u003e diffuses incoming supply air radially across the ceiling surface using the Coanda effect — delivering fresh air evenly without creating downdraught or cold spots at occupant level.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#e6f4f3;border:1px solid #c8e6e3;border-radius:6px;padding:10px 14px;margin:0 0 18px;font-size:.88em;color:#444;\"\u003e\n\u003cstrong style=\"color:#005c54;\"\u003eAbout Airwise:\u003c\/strong\u003e A leading UK and Ireland ventilation products supplier based in Tetbury, Gloucestershire — known for quality, integrity, and competitive pricing across the full spectrum of ventilation ducting, valves, and accessories.\u003c\/div\u003e\n\n\u003cdiv style=\"display:flex;flex-wrap:wrap;justify-content:space-around;background:#e6f4f3;border-radius:6px;padding:8px 4px;margin:18px 0;\"\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003e100mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eSpigot Diameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003eGalvanised Steel\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eConstruction\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003eRAL 9010\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eFinish (White)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003eExverted Cone\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eRadial Air Diffusion\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003eMVHR \/ PIV\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eCompatible Systems\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background:#e6f4f3;border-left:4px solid #005c54;padding:12px 16px;margin:14px 0;border-radius:0 4px 4px 0;font-size:.95em;\"\u003e\n\u003cstrong\u003eSupply Cone vs Extract Cone:\u003c\/strong\u003e The AWMAV100S has an \u003cstrong\u003eexverted (convex) cone\u003c\/strong\u003e that pushes incoming air outward along the ceiling — spreading fresh supply air evenly into the room. The AWMAV100 extract valve has an \u003cstrong\u003einverted (concave) cone\u003c\/strong\u003e that draws air in. These are not interchangeable — always use the supply valve at fresh air delivery points and the extract valve at stale air collection points.\u003c\/div\u003e\n\u003cdiv style=\"background:#fff8e1;border-left:4px solid #c77a00;padding:12px 16px;margin:14px 0;border-radius:0 4px 4px 0;font-size:.95em;\"\u003e\n\u003cstrong\u003eCommissioning:\u003c\/strong\u003e Set the cone position using a \u003cstrong\u003ecalibrated airflow meter or flow hood\u003c\/strong\u003e after the full system is connected and the MVHR or PIV unit is running. Verify that each room's supply rate meets the design specification and UK Building Regulations Part F minimum ventilation rates.\u003c\/div\u003e\n\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;margin:28px 0 16px;border-radius:4px;font-size:1.05em;font-weight:700;letter-spacing:.3px;\"\u003eKey Features\u003c\/div\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin:16px 0;\"\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eGalvanised Steel Construction\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003e\n\u003cstrong\u003eGalvanised steel body\u003c\/strong\u003e provides long-term durability in ceiling installations across living rooms, bedrooms, and hallways — the typical supply terminal locations in MVHR whole-house systems.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eRAL 9010 White Finish\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003e\n\u003cstrong\u003eFactory powder-coated in RAL 9010 pure white\u003c\/strong\u003e for a clean, unobtrusive ceiling finish that blends with standard domestic and commercial ceiling surfaces without requiring additional decoration.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eExverted Supply Cone\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eThe \u003cstrong\u003econvex central cone spreads incoming supply air radially outward\u003c\/strong\u003e along the ceiling surface, using the Coanda effect to distribute fresh air across the room without directing a cold jet of air onto occupants below.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eAdjustable Flow Rate\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eRotating the cone adjusts the \u003cstrong\u003eannular supply gap\u003c\/strong\u003e, giving direct control over the fresh air delivery rate at each room terminal — the primary tool for balancing supply rates across multiple rooms during MVHR commissioning.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eLow-Noise Supply Diffusion\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eThe supply valve geometry is engineered for \u003cstrong\u003elow turbulence and minimal airflow-generated noise\u003c\/strong\u003e at the terminal — essential for acoustic comfort in bedrooms and quiet living spaces served by continuous ventilation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eCeiling or Wall Mounting\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eSuitable for \u003cstrong\u003eceiling or wall mounting\u003c\/strong\u003e, accommodating different duct routing layouts in both new-build MVHR installations and retrofit PIV system distribution runs.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;margin:28px 0 16px;border-radius:4px;font-size:1.05em;font-weight:700;letter-spacing:.3px;\"\u003eSpecifications\u003c\/div\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:.92em;margin:16px 0;\"\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eSKU\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eAWMAV100S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eAirwise\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eDiameter\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003e100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eMetal supply air valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eBody Material\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eGalvanised steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eRAL 9010 white powder coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eCone Type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eExverted (convex) — supply air diffusion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eCone Adjustment\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eRotary — adjustable by hand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eMounting\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eCeiling or wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eTypical Rooms\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eLiving room, bedroom, hallway, study — MVHR and PIV supply terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eCompatible Systems\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eMVHR, PIV, mechanical supply ventilation (100mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;margin:28px 0 16px;border-radius:4px;font-size:1.05em;font-weight:700;letter-spacing:.3px;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eWhy must I use a supply valve rather than an extract valve for fresh air?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eThe \u003cstrong\u003econvex (exverted) cone of the supply valve\u003c\/strong\u003e is specifically shaped to spread incoming air across the ceiling using the Coanda effect, preventing cold downdraught at occupant level. The concave extract valve cone draws air inward — using it for supply would deliver a concentrated jet of air directly into the room, causing draughts and poor comfort.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eWhere in the room should I position the supply valve?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eInstall the supply valve in the \u003cstrong\u003eceiling of the habitable room, ideally near the centre or above the primary living\/sleeping area\u003c\/strong\u003e. Avoid positioning directly above chairs, sofas, or beds — even diffused supply air can feel draughty at higher flow rates at very close range.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eWhat is the typical supply rate for a bedroom at 100mm?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eFor a standard domestic bedroom, MVHR design typically specifies \u003cstrong\u003e12–25 litres per second (l\/s) supply\u003c\/strong\u003e depending on room size and occupancy. A 100mm supply valve with appropriate system design comfortably handles this range. Verify with your MVHR commissioning data sheet.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eIs the AWMAV100S suitable for bathrooms?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eSupply valves are installed in \u003cstrong\u003ehabitable rooms only\u003c\/strong\u003e — living rooms, bedrooms, hallways, and studies. Bathrooms and WCs are extract-only points in MVHR systems. Do not install supply valves in wet rooms unless specifically required by your ventilation design.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eCan I use this valve with rigid duct and flexible duct?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eYes — the 100mm spigot connection is compatible with \u003cstrong\u003eboth rigid PVC round duct and flexible duct connections\u003c\/strong\u003e of the same diameter. Secure flexible duct with a worm drive clip before fitting the valve.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"AirWise Ventilation","offers":[{"title":"Default Title","offer_id":64801776271709,"sku":"AWMAV100S","price":3.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/AirwiseAWMAV100SMetalSupplyAirValve100mmMVHR.jpg?v=1779858549","url":"https:\/\/qualityheating.co.uk\/products\/airwise-awmav100s-metal-supply-air-valve-100mm-mvhr","provider":"AIZO Quality Heating","version":"1.0","type":"link"}