buyingabroad
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That pipe needs to be hidden at all costs!!
Presume villa1 means qualpex.
Push for a copper plumb through out. We have come across qualpex pipe in refurbishments, weeping around joints, speedi fittings used - leaking. These can weep long after your plumber is gone.
If your joist runs allow I would recommend plumbing is soldered joints and air pressure tested before commissioning. If you are troubled with joists and bridging use qualpex in complete runs, no joints hidden in the floor or inaccessible positions. You can use copper tails to the radiators, you can leave access to the floor void under the radiators.
Both would be considered good boilers, make sure output rating is high enough to handle the requirements of the house comfortably.
would also like to add, from your listed quotes:
the Worster CDI boilers are excellenton all fronts
won't even dignify the Gloworm with a response!
Pros Qualpex Ideal for hidden work, can be run easily between drilled floor joists, less joints. Will not corrode if in contact with soft acidic well water. Cuts labour costs. Unqualified handymen love it. Cheaper than copper, lightweight and fairly robust in comparison to copper. Less problems with water hammer.
Cons Qualpex, if installed incorrectly will break down and leak, eg, radius bends too tight, pipe kinking, twisting between fittings. I've seen this type of pipe connected directly to boilers and even directyly off solid fuel stoves! Ouch!!These types of polyetylene, polybutylene plastic pipes have rendered many domestic plumbers totally inadequate when it comes to skillfull tasks like boiler house, hot press, and surface pipework. This pipe served the "tiger lash it in mentality" well. It's now time to insist on quality work. This type of pipe can, if incorrectly installed, cause constant airlocking problems if used on low pressure gravity supply systems.
What do you think of Viessmann?. A client insisted on one, comissioned it today and have to say, I am impressed. two flows and two returns form boiler. Primary circuit can be run at a higher temp for a shorter time, with cylinder stat wired directly back to it.
help! advice on heating system needed. have decided on 2 solid fuel stoves+back boilers. space is 2,000 sq. ft, single storey; will also fit solar.question is how to heat the space without using rad.s? geo is too expensive. had thought of ufh but experts directly contradict each other on compatibility with stoves. house will be close to passive and advice on ventilation is also contradictory. hrv seems expensive too. i need a simple system!
Whoever you get to install this system make sure that they are familiar with dual open vented systems coupled up to a solar hot water system. Many plumbers in this country have no clue as to how to install a dual system of central heating let alone linking two open vented solid fuel stoves together.help! advice on heating system needed. have decided on 2 solid fuel stoves+back boilers. space is 2,000 sq. ft, single storey; will also fit solar.question is how to heat the space without using rad.s? geo is too expensive. had thought of ufh but experts directly contradict each other on compatibility with stoves. house will be close to passive and advice on ventilation is also contradictory. hrv seems expensive too. i need a simple system!
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