Housing and equipment in Chelsea
A new Chelsea home has a sealed high-efficiency furnace with sidewall venting, a heat recovery ventilator, and often a tankless or high-recovery water heater in a compact purpose-built mechanical room.
- That equipment is capable but tightly interdependent, and airtight modern construction makes the ventilation side more consequential for indoor comfort than in older housing.
- Much of it has never been serviced since commissioning.

