I'm trying to heat a small apartment with a forced air gas furnace. I've already considered both hydronics and heat pumps/electric heat and have ruled them all out for variety of reasons. It's a small apartment (~500sqft) and Manual J gets me to about 14,000 BTU heating. I know "rules of thumb" are useless, but if I use 50 BTU/sqft (as some sources recommend), I get right about 25,000 BTU. I am considering two options: a) a [url=http://www.dettson.com/products/chinook-compact/]Dettson Chinook Compact[/url] - mods from 6,000 BTU - 15,000 BTU. Perfectly sized, but downside is that it's more expensive, harder to service, local suppliers don't stock parts etc. This is a rental property, so I do have to consider ease/cost of servicing. b) a [url=https://www.keeprite.com/en/us/products/gas-furnaces/96-gas-furnace/]Keeprite G9MXE Low Capacity Furnace[/url] - single stage at 26,000 BTUs with ECM. My HVAC guy recommends this one over the Dettson because it's less expensive, and easier to service - he says not to worry about short cycling. What are your thoughts? I'd prefer the Keeprite, but should I worry about problems if it's almost double my heating load? Much appreciated

Problem about my[B] Oil heating furnace in my home, By “Carrier”,.. ( makes very loud explosive noises, inside the fire-chamber,.. where the ignition takes place ) [/B] Below ( link ) are the pictures of my Home’s Oil / Diesel heating furnace, situated in my basement,… roughly 15+ yrs old,…. Using oil / diesel / no.2 oil,…. Specification of my Oil furnace ( please also see 15 pictures in a link, given below ) Carrier , Model 58HUO85101CA, Serial :W556606 Bonnet : 85.0000BTU Furnace No : 731074 DUCANE Models : DMR-10A, 0.76 GPH Fuel injector Nozzle : 0.75, 80 degree, B For last few days, due to the extreme heavy winter in east coast and running a little more,.. it has started making loud explosive kinda noises,….. ( as if, suppose,….you drop a toaster/microwave oven / big - hugh empty tin-can ,…..down the stairs and how loud noises, it makes,.. ) It starts very usual and normal,… ( I played with, reset button..on the motor as well as on unit many times watching all YT videos ) Starts very normal and smooth,…..with no problem,.. but after 2-3 minutes of sound running, it starts making noises like you drop a microwave down the stairs,… same kind of noises,… coming from inside the ignition chamber where fire takes place,… These sounds are not from the fan / elec. motor / pump which are outside ( when you take off the frontal cover ) . No valves are closed,… though I did not do any fuel injector changing or oil filter changing in last 6 years and also used the heater very little too, in last 6 yrs,… . Furnace is just for house-heating (HVAC) and no water- heater work is attaché dto it,.. I am a simple house-hold person and not any technician or craftsman or handyman at all,.. I cant not afford hugh amounts for inspection nor can replace the furnace,… Can do the tune-up myself at the best,.. I bought fuel injector nozzle,… fule filter,… bleeding plastic tube,.. to do the prime,…. Below are the pictures and specifications,.. I have posted all pictures ( 15 pictures ) here, taken by my Cell.[URL]https://www.facebook.com/utpal.yadav.1291/posts/168653137237035[/URL] It has these kind of construction as per this video… In the center is the Fan, right side the electric motor and Left side the Webster pump,…[URL]https://www.youtube.com/watch?v=5EDVdGMzBEA[/URL] I am to plan these, but it will not solve the problem as per my guess,… ( general tune-up ) [LIST=1] [*]Will do bleeding / prime of oil pump on the unit and will remove bubbles and air ( till straight jet of fuel appears. Have seen many videos on YT, so am comfortable with this . [*] Will change oil / fuel filter with 2 small red gaskets and 1 black gasket ting there, have seen many videos on YT, so remain comfortable. Bought from Lowes for around 4 dollars,.. [*] Will take the two electrode and fuel jet nozzle out and will replace with new nozzle and will set the angle and position of electrode straight,.. etc, have seen many YT videos.. [*]Later, if needed, can open the pump’s cover and a small filer inside can be cleaned,.. // risky though, of finding and replacing the gaskets though and leaving more air bubble sin line,.. [/LIST] Can anyone assist with, what is making those sounds as if a big( hugh ) empty,.. tin can/box you drop it down the stairs,… No obvious sound is coming from the motor or bearing or pump , out of shaft,.. but it’s from within the fire chamber, and I have to stop the furnace after every 2-4 minutes, Coz I feel like it will explode like a bomb,.. Is it due to incomplete combustion / air in line / electrode out of angle broken / bent./ loosened ? Any idea,… ? Thanks. [IMG]https://scontent.fphl2-3.fna.fbcdn.net/v/t1.0-9/26231110_168652937237055_6304076618651854616_n.jpg?oh=6dd07e9d8114ecde5e3a999dd1d096e3&oe=5ABC3A9D[/IMG]