Douglas Council says it's spent over £462,000 installing energy efficient boilers in public housing over the past year.
That's according to a response to a Freedom of Information request.
It says it's important to replace boilers when they reach end of life, but this doesn't take priority over other maintenance.
The local authority adds the eco boilers are also more economical to run, which benefits council tenants.
Vampire show featuring Manx ferry cancelled
Did chief minister's message spark fuel panic-buying?
Joe Locke lands purr-fect new role!
Steam Packet fuel surcharge isn't about profit, says chief minister
Ferry crossing delayed by half an hour
Paw-some rescue effort after Milo gets trapped in ravine
New laws for young workers come into force today
Manx Care extends mental health service to more surgeries