OH4 can be installed on closed-loop, controlled heating and cooling systems — the details below let us size and cost your installation precisely, rather than working from a generic estimate.

Why we're asking: To prepare an accurate proposal, we need a clear picture of your current setup. This form takes most sites 5–10 minutes to complete — if your building runs from a single boiler location, you can skip most of the extra sections.

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Before you start, it helps to have nearby:

• Your boiler nameplate (for KW size and fuel type)

• A recent energy bill (for annual kWh and rate per kWh)

• Rough site measurements, if you know them​

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Once you've submitted the form, our team will review your details and come back to you with a tailored proposal shortly.