System Operation

Q: Can I use anti-freeze to protect the system?

A: Anti-freeze can be used with our boilers. We recommend using an anti-freeze designed for hydronic systems, formulated with inhibited propylene glycol, a non-toxic anti-freeze. A solution of up to 50% can be used. No compounds containing petroleum should ever be used in the heating system. Do not use automotive anti-freeze.

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...We continue to highly recommend Weil-McLain products to all of our customers who place their trust in us to provide them with reliable, cost-effective heating equipment.   —  Andrew Stasiw