Typical retrofit: 1–3 days depending on duct and flue works. New installs with duct upgrades: 3–7+ days.

We assess safe termination routes; in many flats, balanced flue/condensing terminations or electric backup may be more practical.

We survey ducts, coil/furnace sizes, and propose compact layouts or bulkheads where needed.

Yes—thermostats + dampers or VAV. We ensure the AHU/furnace can handle low-flow modes safely.

Some frost is normal; the unit should defrost periodically. Persistent ice means airflow/refrigerant/defrost issues—call us.

Turn off the supply at the cylinder/valve, ventilate, avoid sparks, and call us/gas utility. We’ll leak-test and repair.

Yes—by letting the heat pump handle mild days and the furnace step in only when it’s cheaper/warmer to do so.

Yes—models with outdoor sensor/aux lockout logic. We configure staging, defrost, and emergency heat.

Semi-annual: pre-summer cooling service and pre-winter combustion service. Filters may need monthly checks in dusty areas.

Any combustion appliance must be tested. We perform CO/draft checks and recommend CO alarms in living/sleeping areas.

A furnace still needs electricity for controls and blower. We can right-size an inverter/UPS or generator for backup.

Often yes. We match a DX coil, verify blower/duct capacity, add outdoor unit and controls, then commission as a hybrid.

PNG works best in metros; LPG is possible with correct regulators/jets and safe cylinder placement. We follow local codes.

By outdoor temperature (balance point) and your tariff/comfort preferences. We program lockout temps and staging to suit your climate.

In mild weather the heat pump is most efficient; in colder snaps the gas furnace delivers faster, economical heat—optimising comfort and cost.