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Can you bleed a combi boiler?
Yes you can bleed a combi boiler. You do just the same as with a conventional boiler. However, the pressure will drop in your system, so you simply need to adjust it using the little tap (usually below the boiler) to bring it back again (Usually aronud 1.5)
When inspecting a boiler always test the air bleed valves on the radiators?
yes
How much does it cost to replace a heating system?
We just had (Dec,2008) estimates on replacing the boiler in a hydronic (hot water) heating system. The building is, commercial, 6000 square feet , basement and upper level combined. The estimates were not all specific as to boiler size. One of them stated, 260,000 BTU, Peerless MI-09. Another estimate stated, Peerless MI-08, at 227,000 BTU. Lowest estimate was, $4870. Highest estimate was, $7285. Two other estimates were in between.
How do you bleed air from heating pipes on boiler?
There is a key similar to those on radiators on the boilers than can be turned round with an adjustable wrench etc.
What is the difference between an air bleed valve and a pressure relief valve on a boiler?
They serve two different purposes. An air bleed valve is used to remove air from the circulation system. A pressure relief valve is designed to automatically open when certain pressure levels are reached.
