Downsizing Munchkin 399M by Replacing Burner

16sail

The prior homeowners installed a grossly oversized modcon (Munchkin 399M) in our 3,500 sqft New England home.

Our heating contractor suggested replacing the burner with one from a Munchkin 199M to improve efficiency. He indicating this is a very simple exercise, though I suspect the part is not cheap.

Is this a sensible path to follow? Any downsides? Are there any other actions we can take besides a rip and replace of the boiler?

kcopp

The only real answer to that question is a call to HTP.

Grossly oversized is an understatement.

HTP, Inc.
272 Duchaine Boulevard
New Bedford, MA 02745

Telephone: 800 323 9651
Telephone: 508 763 8071
Fax:508 763 3769
E-mail: sales@htproducts.com

Ironman

I doubt if you can do it, but if the factory says it okay, get it in writing with detailed instructions. Also, make them give you a new rating tag for the boiler. Otherwise, the person doing it is totally liable for altering the appliance and any results, which could included personal injury or death.

Another solution which would be less expensive than a new boiler would be to install a properly sized buffer tank.

Rich_49

Your contractor probably should have mentioned or suggested a heat loss be performed . @ 30BTUh sq ft your home is only 105,000 . The 199 is also grossly oversized my friend . Maybe you should find another contractor that is willing to do the right thing . This would be a much better fit and a new warranty also . You won't believe the price point either .

http://www.htproducts.com/UFT-Boiler.html

Sticking a smaller combustion assembly into a wrong sized Giannoni Heat exchanger in a machine with a serial number that is more than likely damn near out of warranty is just plainly a terrible idea . I highly doubt HTP will allow this either . Contact Emerson Swan in Randolph and ask them who might be the best for you to contact in your area to look at this job . They will know who to put you in touch with to get this done right .