Frequently Asked Questions - Gas Fired Boilers

If you are a homeowner who installed your own boiler and are not a professional heating contractor, you must contact the distributor/dealer who sold you the boiler for technical support and warranty action. 

Anti-freeze can be used with most boilers.  Recommended is an anti-freeze designed for hydronic systems and formulated with inhibited propylene glycol, a non-toxic antifreeze. A solution of up to 50% can be used.  No compounds containing petroleum should ever be used in your heating system.  Do not use automotive anit-freeze.

Please contact your local heating professional to troubleshoot your system.

The average setting for the aquastat (the temperature control device on a boiler) for a forced hot water system is 180 degreesF.  It can be raised as high as 210 degreesF if needed in severe weather.  For systems that use coils to heat domestic hot water, the high limit setting is 210 degreesF and the low limit setting 140 degreesF.

Your local heating professional should perform a heat-loss estimate based upon the size and construction of your home before recommending a boiler size and model.

Your local heating professional should perform a heat-loss estimate based upon the size and construction of your home before recommending a boiler size and model.

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