Hi all. I am looking for a conventional boiler for my open vented system to replace an old conventional non condensing boiler and would like a recommendation if possible either for a model or just a brand. I have a 4 bed detached house with 11 radiators. Don't need anything fancy, just something simple, well made and reliable. So far have had a few people out to quote who have offered the following boilers... glowworm Flexicom 24hx, Worcester 18RI and a Vaillant ecoTec plus 428. I don't know anything about these or what makes are good with boilers so would welcome any thoughts or advise.