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mtmsm t1_j5y930u wrote

I’m no handy man, but based on my googling I think the combi boiler in my closet provides both heat and hot water to my unit only. My place is on the newer side so, for instance, I lose very little heat through my windows. It may just be better insulated in general compared to older units.

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Master_Dogs t1_j5zn52n wrote

How large is the building you're in? A multi unit building with proper insulation is definitely possible to be that efficient. Proper insulation, plus sharing walls/floors with other units gives you more heat for free/less heat loss to the outside.

Even a modern SFH with good insulation can be pretty cheap to heat if insulation is good and the windows / doors aren't drafty. Most of us just have early 1900s units that weren't updated properly or at all in some cases. Mass Save like programs should really do more to encourage landlords to upgrade.

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mtmsm t1_j5zqk64 wrote

A few dozen units. I have two exterior walls and am on the ground floor so I'm sure other units are even more insulated than mine.

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